CDC Volume 3 Edit Code 2

1. What is the composition of JP–8 fuel?

Gasoline and kerosene.

Gasoline and diesel fuel.

Diesel fuel and kerosene.

Diesel fuel and aviation gasoline.

JP-8 fuel is a military specification jet fuel that is commonly used by the United States military. It is a kerosene-based fuel that is blended with gasoline. This composition allows JP-8 fuel to have a higher flash point and better performance in cold weather compared to regular jet fuel. The gasoline component also helps to improve the energy density of the fuel, making it more efficient for use in military aircraft.

Explanation

JP-8 fuel is a military specification jet fuel that is commonly used by the United States military. It is a kerosene-based fuel that is blended with gasoline. This composition allows JP-8 fuel to have a higher flash point and better performance in cold weather compared to regular jet fuel. The gasoline component also helps to improve the energy density of the fuel, making it more efficient for use in military aircraft.

2. What is the term for the process of producing voltage in a conductor when it passes through a magnetic field?

Static.

Electronics.

Mutual induction.

Electromagnetic induction.

Electromagnetic induction is the process through which voltage is produced in a conductor when it moves through a magnetic field. This phenomenon was discovered by Michael Faraday and is the basis for the functioning of generators, transformers, and other electrical devices. It involves the generation of an electromotive force (EMF) in the conductor due to the changing magnetic field. This process is widely used in various applications, including power generation, motors, and wireless charging.

Explanation

Electromagnetic induction is the process through which voltage is produced in a conductor when it moves through a magnetic field. This phenomenon was discovered by Michael Faraday and is the basis for the functioning of generators, transformers, and other electrical devices. It involves the generation of an electromotive force (EMF) in the conductor due to the changing magnetic field. This process is widely used in various applications, including power generation, motors, and wireless charging.

3. The SEM/EDX analysis process differs from conventional oil analysis in that the SEM/EDX

Samples must be sent off-site for analysis.

Particles must be oil free for analysis to take place.

Samples can only be obtained in an intermediate maintenance shop.

Provides results only concerning equipment and components condition.

SEM/EDX analysis is a technique used to analyze the composition of particles. In this process, the particles being analyzed must be free of oil in order to obtain accurate results. Oil can interfere with the analysis and affect the identification and characterization of the particles. Therefore, it is necessary to ensure that the particles are oil-free before conducting SEM/EDX analysis.

Explanation

SEM/EDX analysis is a technique used to analyze the composition of particles. In this process, the particles being analyzed must be free of oil in order to obtain accurate results. Oil can interfere with the analysis and affect the identification and characterization of the particles. Therefore, it is necessary to ensure that the particles are oil-free before conducting SEM/EDX analysis.

4. What are microscopic metallic particles in the oil system called?

Wear metals.

Friction metals.

Precious metals.

Transformation metals.

Microscopic metallic particles in the oil system are called wear metals. These particles are formed as a result of friction and wear between moving parts in the engine or machinery. They are typically small and can be detected through oil analysis. The presence of wear metals in the oil can indicate the level of wear and potential damage to the components. Therefore, monitoring wear metals is important for maintenance and diagnosing potential issues in the system.

Explanation

Microscopic metallic particles in the oil system are called wear metals. These particles are formed as a result of friction and wear between moving parts in the engine or machinery. They are typically small and can be detected through oil analysis. The presence of wear metals in the oil can indicate the level of wear and potential damage to the components. Therefore, monitoring wear metals is important for maintenance and diagnosing potential issues in the system.

5. On the T56 engine, how many and what type of fuel pumps are contained in the fuel pump and filter assembly?

3 gear; 1 boost.

2 gear; 2 boost.

2 gear; 1 boost.

1 gear; 2 boost.

The correct answer is 2 gear; 1 boost. This means that the fuel pump and filter assembly on the T56 engine contains two gear pumps and one boost pump. Gear pumps are used to deliver a steady flow of fuel at a consistent pressure, while the boost pump is responsible for providing additional fuel pressure during high power settings or in case of a failure in the gear pumps.

Explanation

The correct answer is 2 gear; 1 boost. This means that the fuel pump and filter assembly on the T56 engine contains two gear pumps and one boost pump. Gear pumps are used to deliver a steady flow of fuel at a consistent pressure, while the boost pump is responsible for providing additional fuel pressure during high power settings or in case of a failure in the gear pumps.

6. Which type of oil pump consists of a gear and rotor within a housing?

Gear.

Gerotor.

Rotogear.

Sliding vane.

A gerotor oil pump consists of a gear and rotor within a housing. The gear and rotor work together to create a pumping action, drawing oil into the pump and then forcing it out under pressure. This type of pump is commonly used in automotive engines and other machinery to circulate oil and lubricate moving parts.

Explanation

A gerotor oil pump consists of a gear and rotor within a housing. The gear and rotor work together to create a pumping action, drawing oil into the pump and then forcing it out under pressure. This type of pump is commonly used in automotive engines and other machinery to circulate oil and lubricate moving parts.

7. Chip detectors have an electrical connection for making which type of check?

AC high-voltage.

DC high-voltage.

Continuity.

Polarity.

Chip detectors have an electrical connection for making a continuity check. This means that they are used to determine if there is a continuous electrical path between two points, ensuring that there are no breaks or interruptions in the circuit. By checking continuity, chip detectors can identify any potential faults or issues in the electrical system.

Explanation

Chip detectors have an electrical connection for making a continuity check. This means that they are used to determine if there is a continuous electrical path between two points, ensuring that there are no breaks or interruptions in the circuit. By checking continuity, chip detectors can identify any potential faults or issues in the electrical system.

8. What type of oil seal has soft metal as its basic composition and allows a small amount of airflow to prevent oil seepage?

Silicone.

Carbon.

Synthetic.

Labyrinth.

A labyrinth oil seal is made of soft metal and has a complex structure that allows a small amount of airflow. This airflow helps to prevent oil seepage by creating a barrier that makes it difficult for the oil to escape. The labyrinth design consists of multiple small channels or grooves that create a tortuous path for the oil, reducing the likelihood of leakage.

Explanation

A labyrinth oil seal is made of soft metal and has a complex structure that allows a small amount of airflow. This airflow helps to prevent oil seepage by creating a barrier that makes it difficult for the oil to escape. The labyrinth design consists of multiple small channels or grooves that create a tortuous path for the oil, reducing the likelihood of leakage.

9. Use extreme care when working with labyrinth seals because of their

Soft metal construction; these seals can be damaged easily.

Soft metal construction; they are sharp and can cut your hand.

Hard metal construction; they are sharp and can cut your hand.

Hard metal construction; these seals can damage the bearing races.

Labyrinth seals are made of soft metal construction, which makes them susceptible to damage. This is why extreme care should be taken when working with them.

Explanation

Labyrinth seals are made of soft metal construction, which makes them susceptible to damage. This is why extreme care should be taken when working with them.

10. Calibration and/or adjustment screws that require setting during an engine trim procedure must be

Replaced.

Die marked.

Safety sealed and/or lockwired.

Applied a thread locking compound.

During an engine trim procedure, calibration and/or adjustment screws may need to be set to ensure proper functioning. To prevent tampering or accidental adjustment after the procedure, these screws should be safety sealed and/or lockwired. Safety sealing involves applying a seal or marking to indicate that the screws have been properly set and should not be tampered with. Lockwiring involves using a wire or other locking device to physically secure the screws in place. This ensures that the screws remain in their correct positions and prevents any unintended adjustments.

Explanation

During an engine trim procedure, calibration and/or adjustment screws may need to be set to ensure proper functioning. To prevent tampering or accidental adjustment after the procedure, these screws should be safety sealed and/or lockwired. Safety sealing involves applying a seal or marking to indicate that the screws have been properly set and should not be tampered with. Lockwiring involves using a wire or other locking device to physically secure the screws in place. This ensures that the screws remain in their correct positions and prevents any unintended adjustments.

11. What is the basic function of an augmentor (afterburner) when it is not operating?

Act as the basic engine tailpipe.

Control engine discharge pressure.

Aid in control of engine oil pressure.

Help to control pressure and N2 speed.

When an augmentor (afterburner) is not operating, its basic function is to act as the basic engine tailpipe. This means that it serves as the outlet for the engine exhaust gases. The augmentor does not have any additional functions or roles when it is not in use.

Explanation

When an augmentor (afterburner) is not operating, its basic function is to act as the basic engine tailpipe. This means that it serves as the outlet for the engine exhaust gases. The augmentor does not have any additional functions or roles when it is not in use.

12. During a visual inspection, how can you tell when a fuel filter is clogged?

A green flag pops out of the filter.

Fuel pressure from the fuel pump is low.

A differential pressure indicator is actuated.

There is no way to tell without disassembling the filter.

A differential pressure indicator is actuated when a fuel filter is clogged. This means that there is a noticeable difference in pressure on either side of the filter, indicating that it is obstructed and not allowing fuel to flow freely. This can be a helpful visual indication during a visual inspection to determine if the fuel filter needs to be replaced.

Explanation

A differential pressure indicator is actuated when a fuel filter is clogged. This means that there is a noticeable difference in pressure on either side of the filter, indicating that it is obstructed and not allowing fuel to flow freely. This can be a helpful visual indication during a visual inspection to determine if the fuel filter needs to be replaced.

13. The purpose of a fuel/oil cooler in a fuel system is to

Heat the fuel and cool the oil.

Cool the fuel and cool the oil.

Heat the fuel and heat the oil.

Cool the fuel and heat the oil.

The purpose of a fuel/oil cooler in a fuel system is to heat the fuel and cool the oil. This is important because fuel needs to be heated in order to vaporize properly and improve combustion efficiency. On the other hand, oil needs to be cooled to prevent it from overheating and losing its lubricating properties. Therefore, a fuel/oil cooler serves the purpose of maintaining the optimal temperature for both the fuel and the oil in a fuel system.

Explanation

The purpose of a fuel/oil cooler in a fuel system is to heat the fuel and cool the oil. This is important because fuel needs to be heated in order to vaporize properly and improve combustion efficiency. On the other hand, oil needs to be cooled to prevent it from overheating and losing its lubricating properties. Therefore, a fuel/oil cooler serves the purpose of maintaining the optimal temperature for both the fuel and the oil in a fuel system.

14. The main fuel control allows the jet engine to safely accelerate, reducing the possibility of

Flameout.

Turbine seizure.

Compressor shift.

Overtemperature.

The main fuel control in a jet engine is responsible for regulating the amount of fuel being supplied to the engine. By carefully controlling the fuel flow, it ensures that the engine operates within safe limits and prevents flameout. Flameout refers to the sudden extinguishing of the flame in the combustion chamber, which can occur if the fuel-air mixture is not properly maintained. This can happen during acceleration if the fuel flow is not adequately controlled, leading to a loss of thrust and potentially dangerous situations. Therefore, the main fuel control is essential in preventing flameout and maintaining the engine's safe operation.

Explanation

The main fuel control in a jet engine is responsible for regulating the amount of fuel being supplied to the engine. By carefully controlling the fuel flow, it ensures that the engine operates within safe limits and prevents flameout. Flameout refers to the sudden extinguishing of the flame in the combustion chamber, which can occur if the fuel-air mixture is not properly maintained. This can happen during acceleration if the fuel flow is not adequately controlled, leading to a loss of thrust and potentially dangerous situations. Therefore, the main fuel control is essential in preventing flameout and maintaining the engine's safe operation.

15. Jet aircraft operating at moderately high altitudes increase the fuel system's susceptibility to an icing condition, further aggravated by the

Lower viscosity of jet fuels.

Higher viscosity of jet fuels.

Lower viscosity of free water.

Higher viscosity of free water.

Jet aircraft operating at moderately high altitudes can experience icing conditions in their fuel system. This is because the lower temperatures at high altitudes can cause the jet fuel to become more viscous. The higher viscosity of the jet fuel can lead to a higher likelihood of ice formation within the fuel system, which can impact its performance and potentially cause issues for the aircraft. Therefore, the correct answer is higher viscosity of jet fuels.

Explanation

Jet aircraft operating at moderately high altitudes can experience icing conditions in their fuel system. This is because the lower temperatures at high altitudes can cause the jet fuel to become more viscous. The higher viscosity of the jet fuel can lead to a higher likelihood of ice formation within the fuel system, which can impact its performance and potentially cause issues for the aircraft. Therefore, the correct answer is higher viscosity of jet fuels.

16. In an engine oil tank, which device separates the air from the oil?

Aerator.

Deaerator.

Check valve.

Bypass valve.

A deaerator is a device that is used to remove air and other gases from the oil in an engine oil tank. It works by heating the oil and allowing the gases to escape, effectively separating them from the oil. This helps to prevent air bubbles from forming in the oil, which can cause damage to the engine and reduce its efficiency.

Explanation

A deaerator is a device that is used to remove air and other gases from the oil in an engine oil tank. It works by heating the oil and allowing the gases to escape, effectively separating them from the oil. This helps to prevent air bubbles from forming in the oil, which can cause damage to the engine and reduce its efficiency.

17. Who is responsible for ensuring that the OAP operates properly?

Project monitor.

Logistics commander.

Propulsion flight chief.

Laboratory supervisor.

The project monitor is responsible for ensuring that the OAP (presumably referring to some kind of project or system) operates properly. They oversee the project and monitor its progress, making sure that everything is running smoothly and according to plan. The logistics commander, propulsion flight chief, and laboratory supervisor may have other responsibilities related to the project, but it is the project monitor's role to ensure its proper operation.

Explanation

The project monitor is responsible for ensuring that the OAP (presumably referring to some kind of project or system) operates properly. They oversee the project and monitor its progress, making sure that everything is running smoothly and according to plan. The logistics commander, propulsion flight chief, and laboratory supervisor may have other responsibilities related to the project, but it is the project monitor's role to ensure its proper operation.

18. When an engine is not operating, static preload for a carbon oil seal is provided by

Air pressure.

Oil pressure.

Spring pressure.

Hydraulic pressure.

When an engine is not operating, the static preload for a carbon oil seal is provided by spring pressure. This means that a spring is used to apply a constant force on the seal, ensuring that it remains in contact with the rotating shaft and prevents any leakage of oil. This preload is necessary to maintain the seal's effectiveness even when the engine is not running and there is no oil or hydraulic pressure available.

Explanation

When an engine is not operating, the static preload for a carbon oil seal is provided by spring pressure. This means that a spring is used to apply a constant force on the seal, ensuring that it remains in contact with the rotating shaft and prevents any leakage of oil. This preload is necessary to maintain the seal's effectiveness even when the engine is not running and there is no oil or hydraulic pressure available.

19. The primary benefit of identifying an impending failure through the OAP is

Improved safety.

Increased component life.

Reduced maintenance cost.

Increased equipment availability.

The primary benefit of identifying an impending failure through the OAP is improved safety. By detecting potential failures in advance, necessary precautions can be taken to prevent accidents or injuries. This ensures a safer working environment for employees and reduces the risk of equipment malfunction or failure causing harm to individuals.

Explanation

The primary benefit of identifying an impending failure through the OAP is improved safety. By detecting potential failures in advance, necessary precautions can be taken to prevent accidents or injuries. This ensures a safer working environment for employees and reduces the risk of equipment malfunction or failure causing harm to individuals.

20. The hazardous property of modern jet engine oil the journeyman must be aware of is

Toxicity.

Viscosity.

Alkalinity.

Corrosiveness.

The correct answer is corrosiveness. Modern jet engine oil can be corrosive, meaning it has the ability to cause damage or deterioration to metal surfaces it comes into contact with. This is an important hazard for a journeyman to be aware of, as it can lead to the degradation of engine components and potentially compromise the safety and performance of the aircraft.

Explanation

The correct answer is corrosiveness. Modern jet engine oil can be corrosive, meaning it has the ability to cause damage or deterioration to metal surfaces it comes into contact with. This is an important hazard for a journeyman to be aware of, as it can lead to the degradation of engine components and potentially compromise the safety and performance of the aircraft.

21. Before taking an oil sample from a drain, drain enough fluid into a container in order to

Check for large particles.

Check the drain operation.

Drain off uncirculated oil.

Drain off water and sludge.

Before taking an oil sample from a drain, it is important to drain off water and sludge. This is because water and sludge can contaminate the oil sample and affect the accuracy of the analysis. By draining off water and sludge, the oil sample will be more representative of the actual condition of the oil and provide more reliable information about its quality and any potential issues.

Explanation

Before taking an oil sample from a drain, it is important to drain off water and sludge. This is because water and sludge can contaminate the oil sample and affect the accuracy of the analysis. By draining off water and sludge, the oil sample will be more representative of the actual condition of the oil and provide more reliable information about its quality and any potential issues.

22. On an F100-PW–220 engine, the air/oil coolers are mounted on the fan duct and use

Secondary fan airflow as a coolant.

Secondary fan airflow as an oil heater.

Primary core engine airflow as a coolant.

Primary core engine airflow as an oil heater.

The air/oil coolers on an F100-PW-220 engine are mounted on the fan duct and use secondary fan airflow as a coolant. This means that the coolers are designed to be cooled by the air that is being pushed by the secondary fan. This airflow helps to dissipate heat from the oil and keep it at a suitable temperature for optimal engine performance.

Explanation

The air/oil coolers on an F100-PW-220 engine are mounted on the fan duct and use secondary fan airflow as a coolant. This means that the coolers are designed to be cooled by the air that is being pushed by the secondary fan. This airflow helps to dissipate heat from the oil and keep it at a suitable temperature for optimal engine performance.

23. In addition to the visual inspection, what other type of inspection does the T–56 engine fuel nozzle require?

Nondestructive.

Spray pattern.

Pre-torque.

Ultrasonic.

The T-56 engine fuel nozzle requires a spray pattern inspection in addition to visual inspection. This suggests that the spray pattern of the fuel nozzle needs to be checked to ensure that it is functioning correctly. This type of inspection is important as it helps to verify that the fuel is being sprayed evenly and efficiently, which is crucial for the engine's performance.

Explanation

The T-56 engine fuel nozzle requires a spray pattern inspection in addition to visual inspection. This suggests that the spray pattern of the fuel nozzle needs to be checked to ensure that it is functioning correctly. This type of inspection is important as it helps to verify that the fuel is being sprayed evenly and efficiently, which is crucial for the engine's performance.

24. What type of fuel control uses items such as thermocouples, relays, amplifiers, and solenoids to help control a jet engine?

Pneumatic.

Fuel injection.

Hydromechanical.

Electrohydromechanical.

Electrohydromechanical fuel control uses items such as thermocouples, relays, amplifiers, and solenoids to help control a jet engine. This type of fuel control combines electrical and hydraulic systems to regulate the flow of fuel into the engine. The thermocouples measure temperature, relays control electrical signals, amplifiers boost signals, and solenoids control the flow of hydraulic fluid. This integrated system ensures precise and efficient fuel control for optimal engine performance.

Explanation

Electrohydromechanical fuel control uses items such as thermocouples, relays, amplifiers, and solenoids to help control a jet engine. This type of fuel control combines electrical and hydraulic systems to regulate the flow of fuel into the engine. The thermocouples measure temperature, relays control electrical signals, amplifiers boost signals, and solenoids control the flow of hydraulic fluid. This integrated system ensures precise and efficient fuel control for optimal engine performance.

25. When in the primary mode, what controls the operation of the F100-PW–220 engine?

MEC.

PMG.

TSFC.

DEEC.

The DEEC (Digital Electronic Engine Control) controls the operation of the F100-PW-220 engine when it is in the primary mode. The DEEC is responsible for monitoring and adjusting various engine parameters such as fuel flow, temperature, and pressure to ensure optimal performance and efficiency. It receives inputs from various sensors and uses algorithms to make real-time adjustments to the engine's operation. This control system helps maintain the engine's performance within safe limits and maximize its efficiency.

Explanation

The DEEC (Digital Electronic Engine Control) controls the operation of the F100-PW-220 engine when it is in the primary mode. The DEEC is responsible for monitoring and adjusting various engine parameters such as fuel flow, temperature, and pressure to ensure optimal performance and efficiency. It receives inputs from various sensors and uses algorithms to make real-time adjustments to the engine's operation. This control system helps maintain the engine's performance within safe limits and maximize its efficiency.

26. Core engine fuel flow sequence on an F100-PW–220 engine starts at the main fuel pump and then goes through the

AFP, AFC, fuel/oil cooler, P&D, and fuel nozzles.

MFC, fuel/oil cooler, P&D, and fuel nozzles.

AFC, AFP, fuel/oil cooler, P&D, and fuel nozzles.

Fuel/oil cooler, P&D, MFC, and fuel nozzles.

The correct answer is MFC, fuel/oil cooler, P&D, and fuel nozzles. This sequence indicates the order in which the fuel flows through the different components of the engine. It starts at the MFC (Main Fuel Control), which regulates the fuel flow. Then, it goes through the fuel/oil cooler, which cools the fuel and oil. Next, it passes through the P&D (Pump and Drain Valve), which controls the flow and drains any excess fuel. Finally, it reaches the fuel nozzles, where the fuel is injected into the combustion chamber.

Explanation

The correct answer is MFC, fuel/oil cooler, P&D, and fuel nozzles. This sequence indicates the order in which the fuel flows through the different components of the engine. It starts at the MFC (Main Fuel Control), which regulates the fuel flow. Then, it goes through the fuel/oil cooler, which cools the fuel and oil. Next, it passes through the P&D (Pump and Drain Valve), which controls the flow and drains any excess fuel. Finally, it reaches the fuel nozzles, where the fuel is injected into the combustion chamber.

27. On an F100-PW–220 engine, how many modes is the MFC capable of operating in?

One.

Two.

Three.

Four.

The MFC (Main Fuel Control) on an F100-PW-220 engine is capable of operating in two modes.

Explanation

The MFC (Main Fuel Control) on an F100-PW-220 engine is capable of operating in two modes.

28. Which F100-PW–220 engine fuel system component controls pressurization of the core engine fuel system?

Fuel nozzle.

P&D valve.

N2 sensor.

Tt 2.5 sensor.

The P&D valve is the fuel system component that controls pressurization of the core engine fuel system. It regulates the flow of fuel to maintain the correct pressure for efficient engine operation. The fuel nozzle, N2 sensor, and Tt 2.5 sensor are not directly involved in controlling the pressurization of the fuel system.

Explanation

The P&D valve is the fuel system component that controls pressurization of the core engine fuel system. It regulates the flow of fuel to maintain the correct pressure for efficient engine operation. The fuel nozzle, N2 sensor, and Tt 2.5 sensor are not directly involved in controlling the pressurization of the fuel system.

29. If the red button on an F100-PW–220 engine oil filter pops out and remains extended, the

Button is defective.

Scheduled oil change is due.

Design ambient pressure has been exceeded.

Design pressure differential has been exceeded.

When the red button on an F100-PW–220 engine oil filter pops out and remains extended, it indicates that the design pressure differential has been exceeded. The design pressure differential refers to the maximum pressure difference that the oil filter can handle before it is considered to be operating outside of its intended range. This could be caused by factors such as a clogged filter or a malfunctioning oil pump, which leads to an excessive pressure buildup within the system.

Explanation

When the red button on an F100-PW–220 engine oil filter pops out and remains extended, it indicates that the design pressure differential has been exceeded. The design pressure differential refers to the maximum pressure difference that the oil filter can handle before it is considered to be operating outside of its intended range. This could be caused by factors such as a clogged filter or a malfunctioning oil pump, which leads to an excessive pressure buildup within the system.

30. On an F100-PW–220 engine, what component permits oil to bypass the oil filter during cold weather starts?

Oil relief valve.

Filter poppet valve.

Oil pressure transmitter tap.

Filter assembly bypass valve.

The filter assembly bypass valve is the component that allows oil to bypass the oil filter during cold weather starts. This is necessary because cold weather can cause the oil to thicken and make it difficult for it to flow through the filter. By bypassing the filter, the oil can flow more easily and ensure proper lubrication of the engine during startup.

Explanation

The filter assembly bypass valve is the component that allows oil to bypass the oil filter during cold weather starts. This is necessary because cold weather can cause the oil to thicken and make it difficult for it to flow through the filter. By bypassing the filter, the oil can flow more easily and ensure proper lubrication of the engine during startup.

31. On an F100-PW–220 engine, the DEEC is cooled by

Oil.

Fuel.

Ram air.

Hydraulic fluid.

The DEEC (Digital Electronic Engine Control) is a critical component in the F100-PW-220 engine. It is responsible for regulating and controlling the engine's performance. Since the DEEC is an electronic device, it generates heat during operation. To prevent overheating and ensure proper functioning, it needs to be cooled. In the case of the F100-PW-220 engine, the DEEC is cooled by fuel. This means that a portion of the fuel flowing through the engine is diverted to cool the DEEC, dissipating the heat and maintaining optimal operating conditions.

Explanation

The DEEC (Digital Electronic Engine Control) is a critical component in the F100-PW-220 engine. It is responsible for regulating and controlling the engine's performance. Since the DEEC is an electronic device, it generates heat during operation. To prevent overheating and ensure proper functioning, it needs to be cooled. In the case of the F100-PW-220 engine, the DEEC is cooled by fuel. This means that a portion of the fuel flowing through the engine is diverted to cool the DEEC, dissipating the heat and maintaining optimal operating conditions.

32. In what position must the TD valve switches be placed in order to make the T56 engine fuel trimming system inoperative?

OFF.

NULL.

AUTO.

LOCKED.

The TD valve switches must be placed in the NULL position in order to make the T56 engine fuel trimming system inoperative.

Explanation

The TD valve switches must be placed in the NULL position in order to make the T56 engine fuel trimming system inoperative.

33. Which type of oil cooler operates on the same principle as a radiator in an automobile?

Air.

Fuel.

Hydraulic.

Pneumatic.

An air oil cooler operates on the same principle as a radiator in an automobile. Both the air oil cooler and the radiator use air to cool down a fluid, whether it is oil or coolant. In both cases, the fluid passes through a series of tubes or fins, and air is blown or drawn over these tubes or fins to dissipate the heat. This process helps to cool down the fluid and prevent overheating. Therefore, the correct answer is air.

Explanation

An air oil cooler operates on the same principle as a radiator in an automobile. Both the air oil cooler and the radiator use air to cool down a fluid, whether it is oil or coolant. In both cases, the fluid passes through a series of tubes or fins, and air is blown or drawn over these tubes or fins to dissipate the heat. This process helps to cool down the fluid and prevent overheating. Therefore, the correct answer is air.

34. Which stage of compressor air drives the augmenter fuel pump on an F100-PW–220 engine?

7th.

10th.

13th.

14th.

The 13th stage of the compressor drives the augmenter fuel pump on an F100-PW-220 engine.

Explanation

The 13th stage of the compressor drives the augmenter fuel pump on an F100-PW-220 engine.

35. Which part of a generator acts as an automatic switching device, changing alternating current to direct current?

Brushes.

Slip rings.

Commutator.

Permanent magnet.

The commutator is the part of a generator that acts as an automatic switching device, changing alternating current to direct current. It consists of a set of copper segments that are connected to the ends of the armature coil. As the armature rotates, the brushes make contact with different segments of the commutator, effectively reversing the current flow in the coil. This reversal ensures that the current produced by the generator is always in the same direction, resulting in direct current output.

Explanation

The commutator is the part of a generator that acts as an automatic switching device, changing alternating current to direct current. It consists of a set of copper segments that are connected to the ends of the armature coil. As the armature rotates, the brushes make contact with different segments of the commutator, effectively reversing the current flow in the coil. This reversal ensures that the current produced by the generator is always in the same direction, resulting in direct current output.

36. When the null orifice on the T56 engine TD valve is set at zero, how much fuel will the valve bypass?

0%.

10%.

20%.

30%.

When the null orifice on the T56 engine TD valve is set at zero, it means that there is no bypass of fuel through the valve. Therefore, the valve will not bypass any fuel, resulting in 0% fuel bypass.

Explanation

When the null orifice on the T56 engine TD valve is set at zero, it means that there is no bypass of fuel through the valve. Therefore, the valve will not bypass any fuel, resulting in 0% fuel bypass.

37. Under what condition would you not receive an OAP laboratory sample report?

The sample is the first taken after an oil change.

The aircraft is on TDY.

It was a special oil sample.

The results are normal.

If the laboratory results for the OAP sample are normal, it means that there are no abnormalities or issues detected in the sample. Therefore, there would be no need to receive a report for this sample as everything is within the normal range.

Explanation

If the laboratory results for the OAP sample are normal, it means that there are no abnormalities or issues detected in the sample. Therefore, there would be no need to receive a report for this sample as everything is within the normal range.

38. How many sparks per second can the AE2100D3 ignition exciters produce?

1 to 3.

2 to 5.

3 to 6.

4 to 7.

The AE2100D3 ignition exciters can produce a range of 4 to 7 sparks per second.

Explanation

The AE2100D3 ignition exciters can produce a range of 4 to 7 sparks per second.

39. Once the cooling airflow has done its job of cooling the turbine section, where does it go?

Through a heat exchanger.

Out the turbine case bleed holes.

Into the gas stream to exit the engine.

Back to the compressor to be used again.

After the cooling airflow has cooled the turbine section, it is directed into the gas stream to exit the engine. This means that the airflow is released into the exhaust gases and expelled from the engine.

Explanation

After the cooling airflow has cooled the turbine section, it is directed into the gas stream to exit the engine. This means that the airflow is released into the exhaust gases and expelled from the engine.

40. The F100 engine augmentor's primary nozzle actuator is driven by cables from the

T5 amplifier.

Unified control.

Afterburner fuel control.

Convergent exhaust nozzle control.

The correct answer is convergent exhaust nozzle control. The primary nozzle actuator of the F100 engine augmentor is driven by cables from the convergent exhaust nozzle control. This control system is responsible for adjusting the position and shape of the exhaust nozzle, which helps regulate the flow of exhaust gases and optimize engine performance.

Explanation

The correct answer is convergent exhaust nozzle control. The primary nozzle actuator of the F100 engine augmentor is driven by cables from the convergent exhaust nozzle control. This control system is responsible for adjusting the position and shape of the exhaust nozzle, which helps regulate the flow of exhaust gases and optimize engine performance.

41. At room temperature, how many times longer will it take water to settle out of JP–8 than out of gasoline?

Two.

Three.

Four.

Five.

Water will take four times longer to settle out of JP-8 than out of gasoline at room temperature.

Explanation

Water will take four times longer to settle out of JP-8 than out of gasoline at room temperature.

42. When classified as to structure, which of the following is not a type of an oil pump?

Gear.

Gerotor.

Rotogear.

Sliding vane.

The given options are different types of oil pumps. Gear, gerotor, and sliding vane are all types of oil pumps. However, "rotogear" is not a recognized type of oil pump. Therefore, the correct answer is Rotogear.

Explanation

The given options are different types of oil pumps. Gear, gerotor, and sliding vane are all types of oil pumps. However, "rotogear" is not a recognized type of oil pump. Therefore, the correct answer is Rotogear.

43. The temperature datum system static check must be made whenever which component has been replaced?

Compressor.

Power section.

Torquemeter shaft.

Reduction gearbox.

The temperature datum system static check must be made whenever the power section component has been replaced. This is because the power section is responsible for generating power in an engine, and any changes or replacements in this section can affect the temperature datum system. Therefore, it is important to perform a static check on the temperature datum system after replacing the power section to ensure its proper functioning.

Explanation

The temperature datum system static check must be made whenever the power section component has been replaced. This is because the power section is responsible for generating power in an engine, and any changes or replacements in this section can affect the temperature datum system. Therefore, it is important to perform a static check on the temperature datum system after replacing the power section to ensure its proper functioning.

44. The AE2100D3 oil tank pendulum is designed to supply pressurized oil for approximately how long during negative G conditions?

Minimum of 10 seconds.

Minimum of 20 seconds.

Maximum of 10 seconds.

Maximum of 20 seconds.

The AE2100D3 oil tank pendulum is designed to supply pressurized oil for a minimum of 10 seconds during negative G conditions. This means that even in situations where the aircraft is experiencing negative G forces, the oil tank pendulum will continue to provide pressurized oil for at least 10 seconds.

Explanation

The AE2100D3 oil tank pendulum is designed to supply pressurized oil for a minimum of 10 seconds during negative G conditions. This means that even in situations where the aircraft is experiencing negative G forces, the oil tank pendulum will continue to provide pressurized oil for at least 10 seconds.

45. From where does the AE2100D3 ignition system receive its electrical power?

Generator.

Aircraft battery.

Essential DC bus.

Engine-mounted alternator stator.

The AE2100D3 ignition system receives its electrical power from the engine-mounted alternator stator. This component generates electricity through the rotation of the engine, providing a continuous source of power for the ignition system. Unlike the other options listed, such as the generator, aircraft battery, or essential DC bus, the engine-mounted alternator stator is specifically designed to supply power to the ignition system.

Explanation

The AE2100D3 ignition system receives its electrical power from the engine-mounted alternator stator. This component generates electricity through the rotation of the engine, providing a continuous source of power for the ignition system. Unlike the other options listed, such as the generator, aircraft battery, or essential DC bus, the engine-mounted alternator stator is specifically designed to supply power to the ignition system.

46. On the T56 engine, at what percent of engine RPM is the ignition system turned off?

16%.

30%.

65%.

94%.

The ignition system on the T56 engine is turned off at 65% of engine RPM. This means that once the engine reaches 65% of its maximum rotational speed, the ignition system is no longer needed to maintain combustion and can be safely turned off.

Explanation

The ignition system on the T56 engine is turned off at 65% of engine RPM. This means that once the engine reaches 65% of its maximum rotational speed, the ignition system is no longer needed to maintain combustion and can be safely turned off.

47. What is the output VAC of the AE2100D3 alternator stator?

1 to 20 VAC.

20 to 40 VAC.

40 to 60 VAC.

60 to 80 VAC.

The output VAC of the AE2100D3 alternator stator is in the range of 20 to 40 VAC.

Explanation

The output VAC of the AE2100D3 alternator stator is in the range of 20 to 40 VAC.

48. What component monitors the AE2100D3 ignition exciters spark rate?

FADEC.

GMAD.

PUAD.

NIU.

The NIU (Network Interface Unit) is responsible for monitoring the AE2100D3 ignition exciters spark rate. The NIU acts as a communication interface between the engine control system and other components, gathering and transmitting data. In this case, it receives information about the spark rate from the ignition exciters and ensures that it is within the specified parameters.

Explanation

The NIU (Network Interface Unit) is responsible for monitoring the AE2100D3 ignition exciters spark rate. The NIU acts as a communication interface between the engine control system and other components, gathering and transmitting data. In this case, it receives information about the spark rate from the ignition exciters and ensures that it is within the specified parameters.

49. Which term describes a jet engine fuel metering device that is really two fuel controls in one component?

Unified.

Combined.

Bimechanical.

Electrosecondary.

A unified fuel metering device is a jet engine component that combines two separate fuel controls into a single unit. This allows for more efficient and streamlined fuel management in the engine.

Explanation

A unified fuel metering device is a jet engine component that combines two separate fuel controls into a single unit. This allows for more efficient and streamlined fuel management in the engine.

50. What engine section houses the JFS combustion section?

Geartrain.

Turbine plenum.

Generator control unit.

Gas generator and accessory drive assembly.

The turbine plenum is the engine section that houses the JFS (Jet Fuel Starter) combustion section. The JFS is responsible for starting the engine by providing the initial combustion needed to power the engine's turbine. Therefore, it makes sense for the JFS combustion section to be located in the turbine plenum, which is a crucial part of the engine where the combustion process takes place.

Explanation

The turbine plenum is the engine section that houses the JFS (Jet Fuel Starter) combustion section. The JFS is responsible for starting the engine by providing the initial combustion needed to power the engine's turbine. Therefore, it makes sense for the JFS combustion section to be located in the turbine plenum, which is a crucial part of the engine where the combustion process takes place.

51. The compressor bleed system reduces the probability of compressor stall in a dual-rotor engine by

Reducing the amount of air available to the N2 compressor.

Reducing the amount of air available to the N1 compressor.

Increasing the amount of air delivered to the N2 compressor.

Increasing the amount of air delivered by the N1 compressor.

The compressor bleed system reduces the probability of compressor stall in a dual-rotor engine by reducing the amount of air available to the N2 compressor. This is because compressor stall occurs when there is too much air entering the compressor, causing disruptions in the airflow and a loss of efficiency. By reducing the amount of air available to the N2 compressor, the system helps maintain a more stable airflow and reduces the risk of stall.

Explanation

The compressor bleed system reduces the probability of compressor stall in a dual-rotor engine by reducing the amount of air available to the N2 compressor. This is because compressor stall occurs when there is too much air entering the compressor, causing disruptions in the airflow and a loss of efficiency. By reducing the amount of air available to the N2 compressor, the system helps maintain a more stable airflow and reduces the risk of stall.

52. What law does the C-D supersonic inlet use to slow down the airflow?

Ohm’s law.

Bernoulli’s law.

Newton’s first law.

Newton’s third law.

The C-D supersonic inlet uses Bernoulli's law to slow down the airflow. According to Bernoulli's principle, as the speed of a fluid increases, its pressure decreases. The C-D supersonic inlet is designed in a way that it increases the area of the flow passage, causing the airflow to slow down and the pressure to increase. This allows the supersonic airflow to be converted into subsonic flow, which is necessary for the functioning of the inlet.

Explanation

The C-D supersonic inlet uses Bernoulli's law to slow down the airflow. According to Bernoulli's principle, as the speed of a fluid increases, its pressure decreases. The C-D supersonic inlet is designed in a way that it increases the area of the flow passage, causing the airflow to slow down and the pressure to increase. This allows the supersonic airflow to be converted into subsonic flow, which is necessary for the functioning of the inlet.

53. Which type of oil system stores the oil in a tank fitted to the side of the engine?

Dry sump.

Wet sump.

Cold tank.

Hot tank.

A dry sump oil system stores the oil in a separate tank that is mounted to the side of the engine, rather than in the oil pan (sump) at the bottom of the engine. This design allows for a larger oil capacity, better oil control, and improved lubrication, especially in high-performance or racing engines. The oil is pumped from the tank to the engine, and then returns to the tank to be cooled and recirculated. In contrast, a wet sump system stores the oil in the engine's oil pan, which is located underneath the engine.

Explanation

A dry sump oil system stores the oil in a separate tank that is mounted to the side of the engine, rather than in the oil pan (sump) at the bottom of the engine. This design allows for a larger oil capacity, better oil control, and improved lubrication, especially in high-performance or racing engines. The oil is pumped from the tank to the engine, and then returns to the tank to be cooled and recirculated. In contrast, a wet sump system stores the oil in the engine's oil pan, which is located underneath the engine.

54. On the T56 engine, what compares the desired throttle setting from the coordinator with the actual TIT signal from the thermocouples?

TD valve.

Speed-sensitive control.

TD potentiometers.

TD amplifier.

The TD amplifier on the T56 engine compares the desired throttle setting from the coordinator with the actual TIT (Turbine Inlet Temperature) signal from the thermocouples. This comparison helps to ensure that the engine is operating at the correct temperature and that the throttle setting is accurately adjusted based on the TIT signal. The TD amplifier plays a crucial role in maintaining the engine's performance and efficiency.

Explanation

The TD amplifier on the T56 engine compares the desired throttle setting from the coordinator with the actual TIT (Turbine Inlet Temperature) signal from the thermocouples. This comparison helps to ensure that the engine is operating at the correct temperature and that the throttle setting is accurately adjusted based on the TIT signal. The TD amplifier plays a crucial role in maintaining the engine's performance and efficiency.

55. On a simple AC generator, which item takes the current from the slip rings to operate the electrical device?

Brushes.

Commutator.

Rotating loop.

Permanent magnet.

The correct answer is "Brushes." In a simple AC generator, the brushes are responsible for taking the current from the slip rings to operate the electrical device. The brushes make contact with the slip rings, which are connected to the rotating loop of wire in the generator. As the loop rotates, the brushes maintain contact with the slip rings, allowing the current to flow from the generator to the electrical device. The brushes act as conductors, transferring the electrical energy from the generator to the device.

Explanation

The correct answer is "Brushes." In a simple AC generator, the brushes are responsible for taking the current from the slip rings to operate the electrical device. The brushes make contact with the slip rings, which are connected to the rotating loop of wire in the generator. As the loop rotates, the brushes maintain contact with the slip rings, allowing the current to flow from the generator to the electrical device. The brushes act as conductors, transferring the electrical energy from the generator to the device.

56. What component heats augmentor fuel to provide better vaporization and combustion?

Fuel control.

Fuel spraybars.

Fuel manifolds.

Fuel/oil cooler.

The fuel/oil cooler is responsible for heating the augmentor fuel to improve vaporization and combustion. By cooling the oil, the heat is transferred to the fuel, increasing its temperature and enhancing the combustion process. This component plays a crucial role in optimizing the performance of the engine by ensuring efficient fuel combustion.

Explanation

The fuel/oil cooler is responsible for heating the augmentor fuel to improve vaporization and combustion. By cooling the oil, the heat is transferred to the fuel, increasing its temperature and enhancing the combustion process. This component plays a crucial role in optimizing the performance of the engine by ensuring efficient fuel combustion.

57. The ACAWS message low oil level advisory for the AE2100D3 engine occurs when the engine oil level drops below

2 US gallons.

3 US gallons.

4 US gallons.

5 US gallons.

The correct answer is 4 US gallons. This means that the ACAWS message low oil level advisory for the AE2100D3 engine will occur when the engine oil level drops below 4 US gallons.

Explanation

The correct answer is 4 US gallons. This means that the ACAWS message low oil level advisory for the AE2100D3 engine will occur when the engine oil level drops below 4 US gallons.

58. On the T56 engine, the manifold pressure switch opens to deenergize the fuel enrichment relay when fuel pressure, in psi, in the manifold reaches

30 psi.

40 psi.

50 psi.

60 psi.

The manifold pressure switch on the T56 engine is designed to open and deenergize the fuel enrichment relay when the fuel pressure in the manifold reaches a certain level. In this case, the correct answer is 50 psi. This means that when the fuel pressure in the manifold reaches or exceeds 50 psi, the manifold pressure switch will open, causing the fuel enrichment relay to be deenergized.

Explanation

The manifold pressure switch on the T56 engine is designed to open and deenergize the fuel enrichment relay when the fuel pressure in the manifold reaches a certain level. In this case, the correct answer is 50 psi. This means that when the fuel pressure in the manifold reaches or exceeds 50 psi, the manifold pressure switch will open, causing the fuel enrichment relay to be deenergized.

59. What provides the PTO shaft that is used to drive the CSD?

Engine fittings.

Engine adapter.

Aircraft fittings.

Aircraft adapter.

The PTO shaft used to drive the CSD is provided by the engine adapter. This component connects the engine to the CSD and allows for the transfer of power from the engine to the CSD through the PTO shaft. Engine fittings, aircraft fittings, and aircraft adapters are not directly involved in providing the PTO shaft for driving the CSD.

Explanation

The PTO shaft used to drive the CSD is provided by the engine adapter. This component connects the engine to the CSD and allows for the transfer of power from the engine to the CSD through the PTO shaft. Engine fittings, aircraft fittings, and aircraft adapters are not directly involved in providing the PTO shaft for driving the CSD.

60. What are the two main types of augmentor (afterburner) ignition systems?

Torch igniter and hot streak.

Hot streak and fuel injection.

Pilot burner ring and hot streak.

Torch igniter and pilot burner ring.

The two main types of augmentor (afterburner) ignition systems are torch igniter and pilot burner ring. Torch igniter is a type of ignition system that uses a high-energy spark to ignite the fuel-air mixture in the afterburner. Pilot burner ring, on the other hand, is a type of ignition system that uses a continuous flame to ignite the fuel-air mixture. These two types of ignition systems are commonly used in afterburners to ensure reliable and efficient ignition of the fuel-air mixture.

Explanation

The two main types of augmentor (afterburner) ignition systems are torch igniter and pilot burner ring. Torch igniter is a type of ignition system that uses a high-energy spark to ignite the fuel-air mixture in the afterburner. Pilot burner ring, on the other hand, is a type of ignition system that uses a continuous flame to ignite the fuel-air mixture. These two types of ignition systems are commonly used in afterburners to ensure reliable and efficient ignition of the fuel-air mixture.

61. How many linear hydraulic actuators are used to deploy and stow the fan thrust on the F117-PW–100 engine?

2

3

4

5

The F117-PW-100 engine uses four linear hydraulic actuators to deploy and stow the fan thrust.

Explanation

The F117-PW-100 engine uses four linear hydraulic actuators to deploy and stow the fan thrust.

62. What AE2100D3 component drives the PGB lube and scavenge pump?

Alternator stator.

Prop gearbox.

PUAD.

GMAD.

The GMAD (Gearbox Mounted Accessory Drive) is the component that drives the PGB (Propeller Gearbox) lube and scavenge pump in the AE2100D3 engine. The GMAD is responsible for transmitting power from the engine to various accessories, including the lube and scavenge pump. This ensures proper lubrication and scavenging of the propeller gearbox, which is essential for the smooth operation of the engine. The other options mentioned, such as the alternator stator, prop gearbox, and PUAD, are not directly involved in driving the PGB lube and scavenge pump.

Explanation

The GMAD (Gearbox Mounted Accessory Drive) is the component that drives the PGB (Propeller Gearbox) lube and scavenge pump in the AE2100D3 engine. The GMAD is responsible for transmitting power from the engine to various accessories, including the lube and scavenge pump. This ensures proper lubrication and scavenging of the propeller gearbox, which is essential for the smooth operation of the engine. The other options mentioned, such as the alternator stator, prop gearbox, and PUAD, are not directly involved in driving the PGB lube and scavenge pump.

63. On an F100 engine, the breather pressurizing valve is internally mounted in the

Oil tank.

Gearbox.

Oil filter.

Oil pump.

The breather pressurizing valve on an F100 engine is internally mounted in the gearbox. This means that it is located inside the gearbox rather than being a separate component. The purpose of the breather pressurizing valve is to regulate the pressure within the gearbox, ensuring that it is at the appropriate level for optimal performance. By being internally mounted, it is able to directly control the pressure within the gearbox, making it an essential component for the engine's operation.

Explanation

The breather pressurizing valve on an F100 engine is internally mounted in the gearbox. This means that it is located inside the gearbox rather than being a separate component. The purpose of the breather pressurizing valve is to regulate the pressure within the gearbox, ensuring that it is at the appropriate level for optimal performance. By being internally mounted, it is able to directly control the pressure within the gearbox, making it an essential component for the engine's operation.

64. During jet engine deceleration, a hydromechanical fuel control schedules fuel flow as a function of

RPM.

Inlet temperature.

Burner pressure.

Inlet pressure.

During jet engine deceleration, a hydromechanical fuel control schedules fuel flow as a function of burner pressure. This means that the fuel flow is adjusted based on the pressure in the burner, which is the part of the engine where fuel is burned to generate thrust. By monitoring and regulating the burner pressure, the fuel control system can ensure that the engine is operating efficiently and safely during deceleration. RPM, inlet temperature, and inlet pressure may also be important factors in engine operation, but in this specific scenario, burner pressure is the most relevant parameter for scheduling fuel flow.

Explanation

During jet engine deceleration, a hydromechanical fuel control schedules fuel flow as a function of burner pressure. This means that the fuel flow is adjusted based on the pressure in the burner, which is the part of the engine where fuel is burned to generate thrust. By monitoring and regulating the burner pressure, the fuel control system can ensure that the engine is operating efficiently and safely during deceleration. RPM, inlet temperature, and inlet pressure may also be important factors in engine operation, but in this specific scenario, burner pressure is the most relevant parameter for scheduling fuel flow.

65. Discharge air used for aircraft engine anti-icing to heat-critical areas is taken from which engine area?

Compressor.

Combustion.

Augmentor.

Turbine.

The discharge air used for aircraft engine anti-icing is taken from the compressor. The compressor is responsible for compressing the incoming air before it enters the combustion chamber. This compressed air is then used for various purposes, including anti-icing to prevent ice formation on critical areas of the engine. By taking the discharge air from the compressor, it ensures that the air is at a high enough temperature to effectively prevent ice buildup.

Explanation

The discharge air used for aircraft engine anti-icing is taken from the compressor. The compressor is responsible for compressing the incoming air before it enters the combustion chamber. This compressed air is then used for various purposes, including anti-icing to prevent ice formation on critical areas of the engine. By taking the discharge air from the compressor, it ensures that the air is at a high enough temperature to effectively prevent ice buildup.

66. On early ignition systems, the high-energy capacitor-type ignition system does not include a

Centrifugal switch.

Gas-filled rectifier.

Capacitor.

Vibrator.

The high-energy capacitor-type ignition system does not include a centrifugal switch. A centrifugal switch is a device that is commonly used in ignition systems to control the timing of the spark. It is typically found in older, points-type ignition systems where it is responsible for advancing the spark timing as the engine speed increases. However, in a high-energy capacitor-type ignition system, the timing is controlled electronically and does not require a centrifugal switch.

Explanation

The high-energy capacitor-type ignition system does not include a centrifugal switch. A centrifugal switch is a device that is commonly used in ignition systems to control the timing of the spark. It is typically found in older, points-type ignition systems where it is responsible for advancing the spark timing as the engine speed increases. However, in a high-energy capacitor-type ignition system, the timing is controlled electronically and does not require a centrifugal switch.

67. On early ignition systems, what is the purpose of compositors in an ignition system?

Prevent the points from arcing.

Cause a voltage to jump across the spark gap in the ignition unit.

Step up voltage high enough to break down the air gap of the igniter plug.

Hold back the current flow until the voltage is high enough to be rectified.

Compositors in an ignition system are used to step up the voltage to a level that is high enough to break down the air gap of the igniter plug. This is necessary because the air gap acts as an insulator, preventing the flow of current. By increasing the voltage, the compositors ensure that the spark can jump across the gap and ignite the fuel-air mixture in the engine.

Explanation

Compositors in an ignition system are used to step up the voltage to a level that is high enough to break down the air gap of the igniter plug. This is necessary because the air gap acts as an insulator, preventing the flow of current. By increasing the voltage, the compositors ensure that the spark can jump across the gap and ignite the fuel-air mixture in the engine.

68. What is the primary input power to the main ignition system?

28 VAC.

28 VDC.

120 VAC.

120 VDC.

The primary input power to the main ignition system is 28 VDC.

Explanation

The primary input power to the main ignition system is 28 VDC.

69. Which T56 engine component receives 120 percent of the engine fuel requirement?

TD valve.

Fuel control.

TD control.

Fuel nozzle.

The TD valve receives 120 percent of the engine fuel requirement.

Explanation

The TD valve receives 120 percent of the engine fuel requirement.

70. Oil is supplied to the F–15 JFS through the

Oil tank.

Aircraft filter.

JFS oil system.

CGB oil system.

The correct answer is the CGB oil system. The CGB (Compressor Gearbox) oil system is responsible for supplying oil to the F-15 JFS (Jet Fuel Starter) to lubricate and cool its components. The oil tank and aircraft filter are not directly involved in supplying oil to the JFS, while the JFS oil system is a broader term that encompasses the entire oil system of the JFS, not just the supply. Therefore, the CGB oil system is the most accurate choice.

Explanation

The correct answer is the CGB oil system. The CGB (Compressor Gearbox) oil system is responsible for supplying oil to the F-15 JFS (Jet Fuel Starter) to lubricate and cool its components. The oil tank and aircraft filter are not directly involved in supplying oil to the JFS, while the JFS oil system is a broader term that encompasses the entire oil system of the JFS, not just the supply. Therefore, the CGB oil system is the most accurate choice.

71. What is used to open and close flap-type and iris-type variable-exhaust nozzle systems?

Oil pressure for both types.

Air pressure for both types.

Oil pressure for the flap-type and fuel pressure for the iris-type.

Fuel pressure for the flap-type and air pressure for the iris-type.

Air pressure is used to open and close both flap-type and iris-type variable-exhaust nozzle systems. This means that air pressure is responsible for controlling the movement of these nozzle systems, allowing them to adjust the exhaust flow as needed.

Explanation

Air pressure is used to open and close both flap-type and iris-type variable-exhaust nozzle systems. This means that air pressure is responsible for controlling the movement of these nozzle systems, allowing them to adjust the exhaust flow as needed.

72. What is the purpose of jet engine thrust reversers?

Direct engine thrust in a rearward direction.

Direct engine thrust upward during landing.

Direct engine thrust in the opposite direction.

Provide directional control of the aircraft on the ground.

Jet engine thrust reversers are used to direct the engine thrust in the opposite direction. This is typically done during landing to help the aircraft slow down by redirecting the exhaust gases forward, creating a reverse thrust. By doing so, the aircraft can effectively decelerate and shorten its landing roll. This is especially useful in situations where the runway length is limited or when landing on wet or icy surfaces. The purpose of thrust reversers is not to provide directional control on the ground, but rather to assist in braking and reducing the aircraft's speed after touchdown.

Explanation

Jet engine thrust reversers are used to direct the engine thrust in the opposite direction. This is typically done during landing to help the aircraft slow down by redirecting the exhaust gases forward, creating a reverse thrust. By doing so, the aircraft can effectively decelerate and shorten its landing roll. This is especially useful in situations where the runway length is limited or when landing on wet or icy surfaces. The purpose of thrust reversers is not to provide directional control on the ground, but rather to assist in braking and reducing the aircraft's speed after touchdown.

73. The two air source requirements for a pneumatic starter to operate properly are sufficient

Volume and velocity.

Volume and pressure.

Temperature and velocity.

Temperature and pressure.

A pneumatic starter requires a sufficient volume of air to ensure that there is enough air available to power the starter. This is important because the starter needs a continuous supply of air to operate properly. Additionally, the starter also requires a sufficient pressure of air to ensure that there is enough force to drive the starter mechanism. Without enough pressure, the starter may not be able to generate enough power to start the engine. Therefore, both volume and pressure are necessary air source requirements for a pneumatic starter to operate properly.

Explanation

A pneumatic starter requires a sufficient volume of air to ensure that there is enough air available to power the starter. This is important because the starter needs a continuous supply of air to operate properly. Additionally, the starter also requires a sufficient pressure of air to ensure that there is enough force to drive the starter mechanism. Without enough pressure, the starter may not be able to generate enough power to start the engine. Therefore, both volume and pressure are necessary air source requirements for a pneumatic starter to operate properly.

74. Which type of combustion chamber does the JFS use?

Can.

Annular.

Can-annular.

Restricted flow.

The JFS (Jet Fuel Starter) uses an annular combustion chamber. An annular combustion chamber is a type of combustion chamber in which the fuel and air are mixed in a ring-shaped chamber surrounding the turbine. This design allows for efficient combustion and provides a compact and lightweight solution for the JFS.

Explanation

The JFS (Jet Fuel Starter) uses an annular combustion chamber. An annular combustion chamber is a type of combustion chamber in which the fuel and air are mixed in a ring-shaped chamber surrounding the turbine. This design allows for efficient combustion and provides a compact and lightweight solution for the JFS.

75. The F100-PW–100 engine oil pressure varies with rear compressor rotor speeds (N2), engine inlet oil temperature, and

Oil jet pressure.

Fan turbine speed.

Oil nozzle condition.

Number of oil jets used.

The oil pressure in the F100-PW-100 engine is influenced by various factors such as rear compressor rotor speeds, engine inlet oil temperature, and oil jet pressure. However, the condition of the oil nozzle specifically affects the oil pressure.

Explanation

The oil pressure in the F100-PW-100 engine is influenced by various factors such as rear compressor rotor speeds, engine inlet oil temperature, and oil jet pressure. However, the condition of the oil nozzle specifically affects the oil pressure.

76. Which type of oil system design places the oil cooler in the pressure subsystem?

Cold tank.

Wet tank.

Dry tank.

Hot tank.

The hot tank oil system design places the oil cooler in the pressure subsystem. In this design, the oil cooler is located in the high-pressure side of the system, which allows for efficient cooling of the oil. This design is commonly used in applications where the oil temperature needs to be closely controlled and maintained within a specific range. By placing the oil cooler in the pressure subsystem, the hot tank design ensures that the oil is adequately cooled before it is returned to the system, helping to prevent overheating and potential damage to the components.

Explanation

The hot tank oil system design places the oil cooler in the pressure subsystem. In this design, the oil cooler is located in the high-pressure side of the system, which allows for efficient cooling of the oil. This design is commonly used in applications where the oil temperature needs to be closely controlled and maintained within a specific range. By placing the oil cooler in the pressure subsystem, the hot tank design ensures that the oil is adequately cooled before it is returned to the system, helping to prevent overheating and potential damage to the components.

77. The F100 engine augmentor's exhaust nozzle is variable to control engine

N2 compressor rotor speed.

Thrust and fan stall margin.

Fan stall margin only.

Thrust only.

The F100 engine augmentor's exhaust nozzle is variable to control both the engine's thrust and fan stall margin. By adjusting the size of the exhaust nozzle, the engine can increase or decrease its thrust output. Additionally, the variable nozzle helps maintain a safe margin against fan stall, which is a condition where the airflow over the engine's fan becomes disrupted, leading to a loss of thrust and potential engine damage. Therefore, the variable exhaust nozzle plays a crucial role in managing both thrust and fan stall margin for the F100 engine.

Explanation

The F100 engine augmentor's exhaust nozzle is variable to control both the engine's thrust and fan stall margin. By adjusting the size of the exhaust nozzle, the engine can increase or decrease its thrust output. Additionally, the variable nozzle helps maintain a safe margin against fan stall, which is a condition where the airflow over the engine's fan becomes disrupted, leading to a loss of thrust and potential engine damage. Therefore, the variable exhaust nozzle plays a crucial role in managing both thrust and fan stall margin for the F100 engine.

78. On a dual-spool, axial-flow engine, what controls thrust production of the engine?

Regulating engine RPM.

Regulating compressor discharge pressure.

Controlling turbine exhaust pressure.

Controlling turbine inlet temperature.

The correct answer is controlling turbine inlet temperature. In a dual-spool, axial-flow engine, the thrust production is controlled by regulating the temperature of the air entering the turbine. By controlling the turbine inlet temperature, the engine can adjust the power output and consequently the thrust produced. This is achieved by regulating the fuel flow and adjusting the combustion process to maintain the desired temperature level.

Explanation

The correct answer is controlling turbine inlet temperature. In a dual-spool, axial-flow engine, the thrust production is controlled by regulating the temperature of the air entering the turbine. By controlling the turbine inlet temperature, the engine can adjust the power output and consequently the thrust produced. This is achieved by regulating the fuel flow and adjusting the combustion process to maintain the desired temperature level.

79. On an F110-GE–129 engine, the anti-icing system prevents detrimental formation and accumulation of ice on front frame struts, forward centerbody, and

Ring cowl.

Fan inlet guide vane flaps.

Variable exhaust nozzle flaps.

C-D duct.

The anti-icing system on an F110-GE-129 engine is designed to prevent the formation and accumulation of ice on various parts of the engine. In this case, it specifically targets the fan inlet guide vane flaps. These flaps are located at the front of the engine and play a crucial role in directing airflow. If ice were to form on these flaps, it could disrupt the airflow and potentially cause damage to the engine. Therefore, the anti-icing system is necessary to ensure the proper functioning and safety of the engine.

Explanation

The anti-icing system on an F110-GE-129 engine is designed to prevent the formation and accumulation of ice on various parts of the engine. In this case, it specifically targets the fan inlet guide vane flaps. These flaps are located at the front of the engine and play a crucial role in directing airflow. If ice were to form on these flaps, it could disrupt the airflow and potentially cause damage to the engine. Therefore, the anti-icing system is necessary to ensure the proper functioning and safety of the engine.

80. The OSG on the cartridge-pneumatic starter consists of a body containing

A shaft and piston.

An igniter and cable.

Two pinned flyweights and a piston.

Two pinned flyweights and an igniter.

The OSG (OverSpeed Governor) on the cartridge-pneumatic starter consists of two pinned flyweights and a piston. This configuration allows the OSG to regulate the speed of the starter by controlling the flow of air from the cartridge. As the speed of the starter increases, the flyweights move outward, causing the piston to restrict the flow of air. This helps prevent the starter from overspeeding and potentially causing damage.

Explanation

The OSG (OverSpeed Governor) on the cartridge-pneumatic starter consists of two pinned flyweights and a piston. This configuration allows the OSG to regulate the speed of the starter by controlling the flow of air from the cartridge. As the speed of the starter increases, the flyweights move outward, causing the piston to restrict the flow of air. This helps prevent the starter from overspeeding and potentially causing damage.

81. Approximately how many GPM does the AE2100D3 PUAD lube and scavenge pump provide at engine PTO?

3

5

7

9

The AE2100D3 PUAD lube and scavenge pump provides approximately 5 gallons per minute (GPM) at engine PTO.

Explanation

The AE2100D3 PUAD lube and scavenge pump provides approximately 5 gallons per minute (GPM) at engine PTO.

82. Which T56 engine component sends the fuel to the fuel manifold?

TD valve.

Main fuel pump.

TD amplifier.

Fuel control.

The TD valve is the component that sends the fuel to the fuel manifold in the T56 engine.

Explanation

The TD valve is the component that sends the fuel to the fuel manifold in the T56 engine.

83. The slide-type resistor in the EGT circuit is used to

Adjust the thermocouples.

Calibrate the EGT indicator in the flight station.

Compensate for minor voltage buildups in the circuit.

Compensate for differences in temperatures at altitude.

The slide-type resistor in the EGT circuit is used to calibrate the EGT indicator in the flight station. This means that it is used to adjust the EGT indicator to ensure its accuracy and reliability. By using the slide-type resistor, the EGT indicator can be calibrated to accurately measure the exhaust gas temperature, allowing for precise monitoring of engine performance. This calibration is important for maintaining the safety and efficiency of the aircraft.

Explanation

The slide-type resistor in the EGT circuit is used to calibrate the EGT indicator in the flight station. This means that it is used to adjust the EGT indicator to ensure its accuracy and reliability. By using the slide-type resistor, the EGT indicator can be calibrated to accurately measure the exhaust gas temperature, allowing for precise monitoring of engine performance. This calibration is important for maintaining the safety and efficiency of the aircraft.

84. Which unit of an AC ignition system develops 20,000 volts?

Inverter.

Capacitor.

Generator.

Transformer.

A transformer is a unit of an AC ignition system that develops 20,000 volts. A transformer works by converting the low voltage from the power source into a high voltage output. This high voltage is necessary for the ignition system to create a spark and ignite the fuel mixture in the engine. The other options, such as inverter, capacitor, and generator, are not specifically designed to develop high voltage in an AC ignition system.

Explanation

A transformer is a unit of an AC ignition system that develops 20,000 volts. A transformer works by converting the low voltage from the power source into a high voltage output. This high voltage is necessary for the ignition system to create a spark and ignite the fuel mixture in the engine. The other options, such as inverter, capacitor, and generator, are not specifically designed to develop high voltage in an AC ignition system.

85. Which item on the JFS provides pads for mounting the fuel atomizer assembly?

Stator ring.

Turbine plenum.

Exhaust housing.

Generator assembly.

The turbine plenum on the JFS provides pads for mounting the fuel atomizer assembly.

Explanation

The turbine plenum on the JFS provides pads for mounting the fuel atomizer assembly.

86. Which item initially rotates the JFS?

ESS PTO.

Electric motor mounted on the aircraft.

Hydraulic motor.

Engine PTO.

The hydraulic motor is the item that initially rotates the JFS (Jet Fuel Starter). This motor is responsible for providing the initial rotation to start the engine. The ESS PTO, electric motor mounted on the aircraft, and engine PTO are not involved in the initial rotation of the JFS.

Explanation

The hydraulic motor is the item that initially rotates the JFS (Jet Fuel Starter). This motor is responsible for providing the initial rotation to start the engine. The ESS PTO, electric motor mounted on the aircraft, and engine PTO are not involved in the initial rotation of the JFS.

87. On an F108-CF–100 engine anti-ice system, what is the purpose of the air injector on the air regulator?

Provide controlled airflow during VBV operation.

Control air velocity at high RPM.

Provide auxiliary airflow during engine start.

Control air temperature and pressure.

The air injector on the air regulator of an F108-CF–100 engine anti-ice system is used to control air temperature and pressure. This component helps regulate the flow of air to maintain the desired temperature and pressure levels within the system. It plays a crucial role in ensuring that the engine operates efficiently and prevents any potential damage due to extreme temperatures or pressure imbalances.

Explanation

The air injector on the air regulator of an F108-CF–100 engine anti-ice system is used to control air temperature and pressure. This component helps regulate the flow of air to maintain the desired temperature and pressure levels within the system. It plays a crucial role in ensuring that the engine operates efficiently and prevents any potential damage due to extreme temperatures or pressure imbalances.

88. The F117-PW–100 fan thrust reverser door upper right and left sensors send a signal to which channel or channels of the EEC?

A channel.

B channel.

Both A & B channels.

Both A & C channels.

The F117-PW-100 fan thrust reverser door upper right and left sensors send a signal to the A channel of the EEC.

Explanation

The F117-PW-100 fan thrust reverser door upper right and left sensors send a signal to the A channel of the EEC.

89. On an F110-GE–129 engine, compressor bleed air is used for anti-icing, customer bleed, and

VSV actuator control.

IGV actuator control.

Low-pressure turbine cooling functions.

Main engine fuel pump operation.

Compressor bleed air is used for various purposes in an F110-GE-129 engine, including anti-icing, customer bleed, VSV actuator control, and IGV actuator control. However, the correct answer is low-pressure turbine cooling functions. This means that the compressor bleed air is used to cool the low-pressure turbine, which helps to maintain its efficiency and prevent overheating. This is an important function as the low-pressure turbine plays a crucial role in the overall performance of the engine.

Explanation

Compressor bleed air is used for various purposes in an F110-GE-129 engine, including anti-icing, customer bleed, VSV actuator control, and IGV actuator control. However, the correct answer is low-pressure turbine cooling functions. This means that the compressor bleed air is used to cool the low-pressure turbine, which helps to maintain its efficiency and prevent overheating. This is an important function as the low-pressure turbine plays a crucial role in the overall performance of the engine.

90. The T56 engine speed-sensitive control, measured in RPM, lets electrical current flow to the fuel and ignition system at

16% RPM.

30% RPM.

65% RPM.

94% RPM.

The T56 engine speed-sensitive control allows electrical current to flow to the fuel and ignition system at 16% RPM. This means that at this specific engine speed, the control system activates and enables the necessary electrical current to power the fuel and ignition system, ensuring proper functioning and performance of the engine.

Explanation

The T56 engine speed-sensitive control allows electrical current to flow to the fuel and ignition system at 16% RPM. This means that at this specific engine speed, the control system activates and enables the necessary electrical current to power the fuel and ignition system, ensuring proper functioning and performance of the engine.

91. The core reverser lock proximity sensors are mounted on the

Control valve.

Fwd fan duct.

Aft fan duct.

Actuator.

The correct answer is actuator. The core reverser lock proximity sensors are mounted on the actuator. This means that the sensors are located on the actuator, which is a device responsible for controlling or moving a mechanism. The proximity sensors are likely used to detect the position or movement of the actuator in order to ensure proper functioning of the core reverser lock system.

Explanation

The correct answer is actuator. The core reverser lock proximity sensors are mounted on the actuator. This means that the sensors are located on the actuator, which is a device responsible for controlling or moving a mechanism. The proximity sensors are likely used to detect the position or movement of the actuator in order to ensure proper functioning of the core reverser lock system.

92. On a T56 engine, what controls the rotary movement of the fuel control metering valve?

Temperature.

Engine speed.

Throttle position.

Compressor inlet pressure.

The rotary movement of the fuel control metering valve on a T56 engine is controlled by the compressor inlet pressure. This pressure is used to regulate the amount of fuel being supplied to the engine, ensuring proper combustion and performance. By adjusting the fuel flow based on the compressor inlet pressure, the engine can maintain optimal operating conditions at different power settings and altitudes.

Explanation

The rotary movement of the fuel control metering valve on a T56 engine is controlled by the compressor inlet pressure. This pressure is used to regulate the amount of fuel being supplied to the engine, ensuring proper combustion and performance. By adjusting the fuel flow based on the compressor inlet pressure, the engine can maintain optimal operating conditions at different power settings and altitudes.

93. How many independent circuits are within an F100-PW–100 engine ignition system?

One.

Two.

Three.

Five.

The correct answer is three because an F100-PW-100 engine ignition system consists of three independent circuits.

Explanation

The correct answer is three because an F100-PW-100 engine ignition system consists of three independent circuits.

94. On an F108-CF–100 engine, the variable bleed valves bleed air from the

N1 compressor.

N2 compressor.

First stage fan.

Last stage of compression.

The variable bleed valves on an F108-CF–100 engine are responsible for bleeding air from the N1 compressor. This means that these valves control the amount of air that is released from the N1 compressor, which is an essential part of the engine. Bleeding air from the N1 compressor helps to regulate the engine's performance and ensure optimal operation. Therefore, the correct answer is N1 compressor.

Explanation

The variable bleed valves on an F108-CF–100 engine are responsible for bleeding air from the N1 compressor. This means that these valves control the amount of air that is released from the N1 compressor, which is an essential part of the engine. Bleeding air from the N1 compressor helps to regulate the engine's performance and ensure optimal operation. Therefore, the correct answer is N1 compressor.

95. On an F110-GE–129 engine, which component supplies fuel pressure to operate the IGV actuator?

Main fuel pump.

Main engine control.

Augmentor engine control.

Digital electronic engine control.

The main engine control supplies fuel pressure to operate the IGV actuator on an F110-GE-129 engine. This component is responsible for regulating and controlling various functions of the engine, including the fuel system. It ensures that the correct amount of fuel is delivered to the engine components, such as the IGV actuator, to optimize performance and efficiency. The main fuel pump, augmentor engine control, and digital electronic engine control are not directly involved in supplying fuel pressure to operate the IGV actuator.

Explanation

The main engine control supplies fuel pressure to operate the IGV actuator on an F110-GE-129 engine. This component is responsible for regulating and controlling various functions of the engine, including the fuel system. It ensures that the correct amount of fuel is delivered to the engine components, such as the IGV actuator, to optimize performance and efficiency. The main fuel pump, augmentor engine control, and digital electronic engine control are not directly involved in supplying fuel pressure to operate the IGV actuator.

96. An F110-GE–129 engine contains how many stages of VSV?

Two.

Three.

Five.

Seven.

The correct answer is three because an F110-GE-129 engine contains three stages of Variable Stator Vanes (VSV). Variable Stator Vanes are used in the compressor section of the engine to control the airflow and optimize engine performance at different operating conditions.

Explanation

The correct answer is three because an F110-GE-129 engine contains three stages of Variable Stator Vanes (VSV). Variable Stator Vanes are used in the compressor section of the engine to control the airflow and optimize engine performance at different operating conditions.

97. On the F–15 secondary power system CGB, how are the isolation decouplers extended?

Manually.

Electrically.

Hydraulically.

By spring pressure.

The isolation decouplers on the F-15 secondary power system CGB are extended hydraulically.

Explanation

The isolation decouplers on the F-15 secondary power system CGB are extended hydraulically.

98. On an F108 engine, which manifold is anti-ice air ducted from?

Pneumatic.

Augmentor.

Combustion case.

Compressor case.

The correct answer is "Pneumatic." In an F108 engine, the anti-ice air is ducted from the pneumatic manifold. This means that the air used for anti-icing purposes is sourced from the pneumatic system of the engine.

Explanation

The correct answer is "Pneumatic." In an F108 engine, the anti-ice air is ducted from the pneumatic manifold. This means that the air used for anti-icing purposes is sourced from the pneumatic system of the engine.

99. On the F117-PW–100 engine, what component controls hydraulic power for actuating both the fan and core thrust reversers?

Electronic engine control.

Hydraulic pump.

Control valve.

Fuel control.

The control valve is the component that controls hydraulic power for actuating both the fan and core thrust reversers on the F117-PW-100 engine. This valve regulates the flow of hydraulic fluid to the actuators, allowing for precise control of the thrust reversers and fan. The electronic engine control, hydraulic pump, and fuel control are not directly responsible for controlling hydraulic power in this context.

Explanation

The control valve is the component that controls hydraulic power for actuating both the fan and core thrust reversers on the F117-PW-100 engine. This valve regulates the flow of hydraulic fluid to the actuators, allowing for precise control of the thrust reversers and fan. The electronic engine control, hydraulic pump, and fuel control are not directly responsible for controlling hydraulic power in this context.

100. On an F108-CF–100 engine, the direction of the variable bleed valve rotation is controlled by the

Flexible shafts.

Feedback cable.

Fuel gear motor.

Ballscrew actuators.

The direction of the variable bleed valve rotation on an F108-CF–100 engine is controlled by the fuel gear motor.

Explanation

The direction of the variable bleed valve rotation on an F108-CF–100 engine is controlled by the fuel gear motor.

CDC Volume 3 Edit Code 2

1. What is the composition of JP–8 fuel?

2.

What first name or nickname would you like us to use?

2. What is the term for the process of producing voltage in a conductor when it passes through a magnetic field?

3. The SEM/EDX analysis process differs from conventional oil analysis in that the SEM/EDX

4. What are microscopic metallic particles in the oil system called?

5. On the T56 engine, how many and what type of fuel pumps are contained in the fuel pump and filter assembly?

6. Which type of oil pump consists of a gear and rotor within a housing?

7. Chip detectors have an electrical connection for making which type of check?

8. What type of oil seal has soft metal as its basic composition and allows a small amount of airflow to prevent oil seepage?

9. Use extreme care when working with labyrinth seals because of their

10. Calibration and/or adjustment screws that require setting during an engine trim procedure must be

11. What is the basic function of an augmentor (afterburner) when it is not operating?

12. During a visual inspection, how can you tell when a fuel filter is clogged?

13. The purpose of a fuel/oil cooler in a fuel system is to

14. The main fuel control allows the jet engine to safely accelerate, reducing the possibility of

15. Jet aircraft operating at moderately high altitudes increase the fuel system's susceptibility to an icing condition, further aggravated by the

16. In an engine oil tank, which device separates the air from the oil?

17. Who is responsible for ensuring that the OAP operates properly?

18. When an engine is not operating, static preload for a carbon oil seal is provided by

19. The primary benefit of identifying an impending failure through the OAP is

20. The hazardous property of modern jet engine oil the journeyman must be aware of is

21. Before taking an oil sample from a drain, drain enough fluid into a container in order to

22. On an F100-PW–220 engine, the air/oil coolers are mounted on the fan duct and use

23. In addition to the visual inspection, what other type of inspection does the T–56 engine fuel nozzle require?

24. What type of fuel control uses items such as thermocouples, relays, amplifiers, and solenoids to help control a jet engine?

25. When in the primary mode, what controls the operation of the F100-PW–220 engine?

26. Core engine fuel flow sequence on an F100-PW–220 engine starts at the main fuel pump and then goes through the

27. On an F100-PW–220 engine, how many modes is the MFC capable of operating in?

28. Which F100-PW–220 engine fuel system component controls pressurization of the core engine fuel system?

29. If the red button on an F100-PW–220 engine oil filter pops out and remains extended, the

30. On an F100-PW–220 engine, what component permits oil to bypass the oil filter during cold weather starts?

31. On an F100-PW–220 engine, the DEEC is cooled by

32. In what position must the TD valve switches be placed in order to make the T56 engine fuel trimming system inoperative?

33. Which type of oil cooler operates on the same principle as a radiator in an automobile?

34. Which stage of compressor air drives the augmenter fuel pump on an F100-PW–220 engine?

35. Which part of a generator acts as an automatic switching device, changing alternating current to direct current?

36. When the null orifice on the T56 engine TD valve is set at zero, how much fuel will the valve bypass?

37. Under what condition would you not receive an OAP laboratory sample report?

38. How many sparks per second can the AE2100D3 ignition exciters produce?

39. Once the cooling airflow has done its job of cooling the turbine section, where does it go?

40. The F100 engine augmentor's primary nozzle actuator is driven by cables from the

41. At room temperature, how many times longer will it take water to settle out of JP–8 than out of gasoline?

42. When classified as to structure, which of the following is not a type of an oil pump?

43. The temperature datum system static check must be made whenever which component has been replaced?

44. The AE2100D3 oil tank pendulum is designed to supply pressurized oil for approximately how long during negative G conditions?

45. From where does the AE2100D3 ignition system receive its electrical power?

46. On the T56 engine, at what percent of engine RPM is the ignition system turned off?

47. What is the output VAC of the AE2100D3 alternator stator?

48. What component monitors the AE2100D3 ignition exciters spark rate?

49. Which term describes a jet engine fuel metering device that is really two fuel controls in one component?

50. What engine section houses the JFS combustion section?

51. The compressor bleed system reduces the probability of compressor stall in a dual-rotor engine by

52. What law does the C-D supersonic inlet use to slow down the airflow?

53. Which type of oil system stores the oil in a tank fitted to the side of the engine?

54. On the T56 engine, what compares the desired throttle setting from the coordinator with the actual TIT signal from the thermocouples?

55. On a simple AC generator, which item takes the current from the slip rings to operate the electrical device?

56. What component heats augmentor fuel to provide better vaporization and combustion?

57. The ACAWS message low oil level advisory for the AE2100D3 engine occurs when the engine oil level drops below

58. On the T56 engine, the manifold pressure switch opens to deenergize the fuel enrichment relay when fuel pressure, in psi, in the manifold reaches

59. What provides the PTO shaft that is used to drive the CSD?

60. What are the two main types of augmentor (afterburner) ignition systems?

61. How many linear hydraulic actuators are used to deploy and stow the fan thrust on the F117-PW–100 engine?

62. What AE2100D3 component drives the PGB lube and scavenge pump?

63. On an F100 engine, the breather pressurizing valve is internally mounted in the

64. During jet engine deceleration, a hydromechanical fuel control schedules fuel flow as a function of

65. Discharge air used for aircraft engine anti-icing to heat-critical areas is taken from which engine area?

66. On early ignition systems, the high-energy capacitor-type ignition system does not include a

67. On early ignition systems, what is the purpose of compositors in an ignition system?

68. What is the primary input power to the main ignition system?

69. Which T56 engine component receives 120 percent of the engine fuel requirement?

70. Oil is supplied to the F–15 JFS through the

71. What is used to open and close flap-type and iris-type variable-exhaust nozzle systems?

72. What is the purpose of jet engine thrust reversers?

73. The two air source requirements for a pneumatic starter to operate properly are sufficient

74. Which type of combustion chamber does the JFS use?

75. The F100-PW–100 engine oil pressure varies with rear compressor rotor speeds (N2), engine inlet oil temperature, and

76. Which type of oil system design places the oil cooler in the pressure subsystem?

77. The F100 engine augmentor's exhaust nozzle is variable to control engine