Volume 3 - 2014 CDC 2a651s Jet Aircraft
Questions and Answers
- 1.
(401) What is the composition of JP–8 fuel?
- A.
Gasoline and kerosene.
- B.
Gasoline and diesel fuel.
- C.
Diesel fuel and kerosene.
- D.
Diesel fuel and aviation gasoline.
Correct Answer
A. Gasoline and kerosene.Explanation
JP-8 fuel is a type of jet fuel used by the United States military. It is a blend of kerosene and gasoline. This composition gives JP-8 fuel a high flash point and low volatility, making it suitable for use in both jet engines and diesel engines. The addition of gasoline helps improve the cold weather performance of the fuel, while the kerosene component provides the necessary energy density for efficient combustion.Rate this question:
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- 2.
(401) At room temperature, how many times longer will it take water to settle out of JP–8 than out of gasoline?
- A.
Two.
- B.
Three.
- C.
Four.
- D.
Five.
Correct Answer
C. Four.Explanation
Water will take four times longer to settle out of JP-8 than out of gasoline at room temperature.Rate this question:
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- 3.
(401) Jet aircraft operating at moderately high altitudes increase the fuel system’s susceptibility to an icing condition, further aggravated by the
- A.
Lower viscosity of jet fuels.
- B.
Higher viscosity of jet fuels.
- C.
Lower viscosity of free water.
- D.
Higher viscosity of free water.
Correct Answer
B. Higher viscosity of jet fuels.Explanation
Jet aircraft operating at moderately high altitudes increase the fuel system's susceptibility to an icing condition. This is because at higher altitudes, the temperature is lower, increasing the likelihood of ice formation. The viscosity of a fuel refers to its thickness or resistance to flow. A higher viscosity means the fuel is thicker and less likely to flow easily. In the case of jet fuels, a higher viscosity would make it more difficult for the fuel to flow through the fuel system, increasing the risk of icing. Therefore, the correct answer is higher viscosity of jet fuels.Rate this question:
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- 4.
(402) The main fuel control allows the jet engine to safely accelerate, reducing the possibility of
- A.
Flameout.
- B.
Turbine seizure.
- C.
Compressor shift.
- D.
Overtemperature.
Correct Answer
A. Flameout.Explanation
The main fuel control allows the jet engine to safely accelerate, reducing the possibility of flameout. Flameout refers to the sudden extinguishing of the flame in the engine combustion chamber, leading to a loss of thrust. The main fuel control ensures the proper fuel-air mixture is maintained, preventing an overly lean or rich mixture that could result in flameout. By controlling the fuel flow, the main fuel control helps maintain a stable and continuous combustion process, ensuring the engine operates smoothly and avoids flameout.Rate this question:
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- 5.
(402) During a visual inspection, how can you tell when a fuel filter is clogged?
- A.
A green flag pops out of the filter.
- B.
Fuel pressure from the fuel pump is low.
- C.
A differential pressure indicator is actuated.
- D.
There is no way to tell without disassembling the filter.
Correct Answer
C. A differential pressure indicator is actuated.Explanation
A differential pressure indicator is actuated when a fuel filter is clogged. This means that there is a noticeable difference in pressure between the inlet and outlet of the filter, indicating a blockage. This indicator serves as a visual or audible signal to the inspector that the filter needs to be cleaned or replaced. It provides a convenient and efficient way to determine if a fuel filter is clogged without the need to disassemble it.Rate this question:
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- 6.
(403) On a dual-spool, axial-flow engine, what controls thrust production of the engine?
- A.
Regulating engine RPM.
- B.
Regulating compressor discharge pressure.
- C.
Controlling turbine exhaust pressure.
- D.
Controlling turbine inlet temperature.
Correct Answer
D. Controlling turbine inlet temperature.Explanation
Controlling turbine inlet temperature is the correct answer because it directly affects the amount of power generated by the engine. By regulating the temperature of the air entering the turbine, the engine can control the amount of energy extracted from the combustion process, which in turn affects the thrust production. This allows for precise control of the engine's performance and ensures optimal efficiency and power output.Rate this question:
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- 7.
(403) During jet engine deceleration, a hydromechanical fuel control schedules fuel flow as a function of
- A.
RPM.
- B.
Inlet temperature.
- C.
Burner pressure.
- D.
Inlet pressure.
Correct Answer
C. Burner pressure.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. This is important because the burner pressure directly affects the combustion process, and by controlling the fuel flow in relation to the burner pressure, the engine can maintain optimal performance and efficiency during deceleration. The other options, RPM, inlet temperature, and inlet pressure, are not directly related to the fuel flow adjustment during deceleration.Rate this question:
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- 8.
(403) What type of fuel control uses items such as thermocouples, relays, amplifiers, and solenoids to help control a jet engine?
- A.
Pneumatic.
- B.
Fuel injection.
- C.
Hydromechanical.
- D.
Electrohydromechanical.
Correct Answer
D. Electrohydromechanical.Explanation
Electrohydromechanical fuel control uses components such as thermocouples, relays, amplifiers, and solenoids to regulate the fuel flow in a jet engine. These components work together to measure and control various parameters such as temperature, pressure, and flow rate to ensure efficient and precise fuel delivery. This type of fuel control system combines electrical, hydraulic, and mechanical elements to achieve optimal engine performance.Rate this question:
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- 9.
(403) Which term describes a jet engine fuel metering device that is really two fuel controls in one component?
- A.
Unified.
- B.
Combined.
- C.
Bimechanical.
- D.
Electrosecondary.
Correct Answer
A. Unified.Explanation
The term "unified" describes a jet engine fuel metering device that is really two fuel controls in one component. This means that the device combines two separate fuel controls into a single component, providing a more efficient and streamlined system for metering fuel in a jet engine.Rate this question:
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- 10.
(403) The F100 UFC senses certain variables from the engine through the use of
- A.
A closed loop design.
- B.
An open circuit design.
- C.
The feedback control unit.
- D.
A direct mechanical connection to all engine sensors.
Correct Answer
A. A closed loop design.Explanation
The F100 UFC senses certain variables from the engine through a closed loop design. In a closed loop system, the output is continuously monitored and compared to the desired input. Any deviation from the desired input is corrected through feedback control. This design allows the F100 UFC to constantly adjust and maintain the desired variables from the engine, ensuring optimal performance and efficiency.Rate this question:
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- 11.
(403) If the safety seals on a fuel system component are broken or removed, and you suspect the factory adjustment was altered, you should
- A.
Adjust and reseal the component.
- B.
Keep the component in service to meet the mission.
- C.
Forward the component to the authorized depot for reflow and resealing.
- D.
Continue to keep the component in service if it is documented as a red diagonal on Form 781A, Hydromechanical Fuel Control.
Correct Answer
C. Forward the component to the authorized depot for reflow and resealing.Explanation
If the safety seals on a fuel system component are broken or removed and there is suspicion that the factory adjustment was altered, the appropriate action is to forward the component to the authorized depot for reflow and resealing. This ensures that the component is properly inspected, adjusted, and sealed by authorized personnel, maintaining its safety and functionality.Rate this question:
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- 12.
(403) Calibration and/or adjustment screws that require setting during an engine trim procedure must be
- A.
Replaced.
- B.
Die marked.
- C.
Safety sealed and/or lockwired.
- D.
Treated with a thread locking compound.
Correct Answer
C. Safety sealed and/or lockwired.Explanation
During an engine trim procedure, calibration and/or adjustment screws may need to be set. To ensure that these screws remain in the correct position and prevent any unauthorized tampering or adjustment, they must be safety sealed and/or lockwired. Safety sealing involves adding a seal or tag to indicate that the screws have been properly set and should not be tampered with. Lockwiring involves securing the screws with a wire or other locking mechanism to prevent them from loosening or changing position. This helps maintain the accuracy and reliability of the engine trim procedure.Rate this question:
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- 13.
(404) When in the primary mode, what controls the operation of the F100-PW–220 engine?
- A.
MEC.
- B.
PMG.
- C.
TSFC.
- D.
DEEC.
Correct Answer
D. DEEC.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, exhaust temperature, and compressor speed to ensure optimal engine performance and efficiency. It receives inputs from various sensors and uses its algorithms to make real-time adjustments to maintain the engine within safe operating limits.Rate this question:
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- 14.
(404) On an F100-PW–220 engine, the DEEC is cooled by
- A.
Oil.
- B.
Fuel.
- C.
Ram air.
- D.
Hydraulic fluid.
Correct Answer
B. Fuel.Explanation
The DEEC (Digital Electronic Engine Control) on an F100-PW-220 engine is cooled by fuel. The DEEC is responsible for monitoring and controlling various engine parameters, such as fuel flow, temperature, and pressure. Since fuel is already present in the engine, it is utilized to cool the DEEC as it circulates through the system. This helps to maintain the optimal operating temperature of the DEEC and ensures its proper functioning.Rate this question:
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- 15.
(404) For actuation of the variable vane systems on an F100-PW–220 engine, the MFC provides both the CIVV and
- A.
Rear compressor variable vane actuators with pneumatic (air) pressure.
- B.
Rear compressor variable vane actuators with fuel pressure.
- C.
Variable exhaust nozzle actuators with pneumatic pressure.
- D.
Variable exhaust nozzle actuators with fuel pressure.
Correct Answer
B. Rear compressor variable vane actuators with fuel pressure.Explanation
The correct answer is rear compressor variable vane actuators with fuel pressure. This means that the MFC (Main Fuel Control) provides fuel pressure to the rear compressor variable vane actuators in order to actuate them. This allows for the adjustment of the variable vanes in the rear compressor section of the F100-PW-220 engine, which helps optimize engine performance and efficiency.Rate this question:
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- 16.
(404) Which F100-PW–220 engine fuel system component controls pressurization of the core engine fuel system?
- A.
Fuel nozzle.
- B.
P&D valve.
- C.
N2 sensor.
- D.
Tt 2.5 sensor.
Correct Answer
B. P&D valve.Explanation
The P&D valve controls the pressurization of the core engine fuel system. It regulates the flow of fuel to maintain the required pressure in the system. The fuel nozzle, N2 sensor, and Tt 2.5 sensor are not directly responsible for controlling the pressurization of the fuel system.Rate this question:
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- 17.
(404) Which stage of compressor air drives the augmenter fuel pump on an F100-PW–220 engine?
- A.
7th.
- B.
10th.
- C.
13th.
- D.
14th.
Correct Answer
C. 13th.Explanation
The correct answer is 13th. In a F100-PW-220 engine, the 13th stage of the compressor is responsible for driving the augmenter fuel pump. This stage provides the necessary power to pump fuel into the afterburner, increasing thrust and performance.Rate this question:
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- 18.
(404) On the F100-PW–220 engine, which component controls the augmentor fuel control?
- A.
Fuel pump.
- B.
Fuel pump controller.
- C.
Signature elimination probe.
- D.
DEEC.
Correct Answer
D. DEEC.Explanation
The correct answer is DEEC. The DEEC (Digital Electronic Engine Control) is the component that controls the augmentor fuel control on the F100-PW-220 engine. It is responsible for monitoring and regulating the fuel flow to the augmentor, which is a device used to increase the thrust of the engine during afterburner operation. The DEEC ensures that the correct amount of fuel is delivered to the augmentor, optimizing engine performance and efficiency.Rate this question:
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- 19.
(404) Core engine fuel flow sequence on an F100-PW–220 engine starts at the main fuel pump and then goes through the
- A.
AFP, AFC, fuel/oil cooler, P&D, and fuel nozzles.
- B.
MFC, fuel/oil cooler, P&D, and fuel nozzles.
- C.
AFC, AFP, fuel/oil cooler, P&D, and fuel nozzles.
- D.
Fuel/oil cooler, P&D, MFC, and fuel nozzles.
Correct Answer
B. MFC, fuel/oil cooler, P&D, and fuel nozzles.Explanation
The correct answer is MFC, fuel/oil cooler, P&D, and fuel nozzles. This is the correct sequence for the core engine fuel flow on an F100-PW-220 engine. The fuel flow starts at the MFC (Main Fuel Control) which regulates the fuel flow rate. Then, it goes through the fuel/oil cooler to cool the fuel before entering the P&D (Pump and Dump) system. Finally, the fuel flows through the fuel nozzles where it is injected into the combustion chamber for combustion.Rate this question:
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- 20.
(405) When classified as to structure, which of the following is not a type of an oil pump?
- A.
Gear.
- B.
Gerotor.
- C.
Rotogear.
- D.
Sliding vane.
Correct Answer
C. Rotogear.Explanation
The question asks for a type of oil pump that is not classified by structure. The options provided are Gear, Gerotor, Rotogear, and Sliding vane. The correct answer is Rotogear because it is not a recognized type of oil pump. Gear, Gerotor, and Sliding vane are all valid types of oil pumps that are classified by their specific structures.Rate this question:
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- 21.
(405) Which type of oil pump consists of a gear and rotor within a housing?
- A.
Gear.
- B.
Gerotor.
- C.
Rotogear.
- D.
Sliding vane.
Correct Answer
B. Gerotor.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 through the outlet. This type of pump is commonly used in automotive engines and other applications where a reliable and efficient oil pump is needed.Rate this question:
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- 22.
(405) One micron is a metric linear measurement that is equal to
- A.
1/25 inch.
- B.
1/250 inch.
- C.
1/2,500 inch.
- D.
1/25,000 inch.
Correct Answer
D. 1/25,000 inch.Explanation
One micron is a very small unit of measurement, equal to one millionth of a meter. To convert it to inches, we need to know that there are 25,400 microns in an inch. Therefore, to find the equivalent measurement in inches, we divide 1 by 25,400, which gives us 1/25,400 inch.Rate this question:
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- 23.
(405) Chip detectors have an electrical connection for making which type of check?
- A.
AC high-voltage.
- B.
DC high-voltage.
- C.
Continuity.
- D.
Polarity.
Correct Answer
C. Continuity.Explanation
Chip detectors have an electrical connection for making a continuity check. This means that the chip detector is used to check whether there is a continuous electrical connection between two points or components. By checking for continuity, the chip detector can determine if there is a break or interruption in the electrical circuit, which could indicate a potential issue or fault.Rate this question:
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- 24.
(405) Which type of valve permits oil flow in only one direction?
- A.
Check.
- B.
Relief.
- C.
Bypass.
- D.
Pressurizing.
Correct Answer
A. Check.Explanation
A check valve is a type of valve that allows fluid to flow in only one direction. It has a one-way flow design, which means that it prevents backflow and ensures that the fluid can only move in the desired direction. In this case, the check valve would permit oil flow in only one direction, making it the correct answer.Rate this question:
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- 25.
(405) Which type of oil cooler operates on the same principle as a radiator in an automobile?
- A.
Air/oil.
- B.
Fuel.
- C.
Hydraulic.
- D.
Pneumatic.
Correct Answer
A. Air/oil.Explanation
An air/oil cooler operates on the same principle as a radiator in an automobile. In both cases, heat is transferred from a hot fluid (oil in the case of an air/oil cooler, coolant in the case of a radiator) to the surrounding air. The hot fluid flows through a series of tubes or fins, and air is passed over these surfaces to cool the fluid down. This process allows for efficient cooling of the fluid, preventing it from overheating and maintaining optimal operating conditions.Rate this question:
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- 26.
(405) The purpose of an oil-temperature control valve used with air/oil coolers is to
- A.
Control the oil poppet valve.
- B.
Direct oil around the fuel filter.
- C.
Control oil exiting from the cooler.
- D.
Direct oil around or through the cooler.
Correct Answer
D. Direct oil around or through the cooler.Explanation
The purpose of an oil-temperature control valve used with air/oil coolers is to direct oil around or through the cooler. This valve is responsible for regulating the flow of oil to ensure that it is properly cooled before returning to the engine. By directing the oil around or through the cooler, the valve helps maintain the optimal temperature of the oil, preventing it from overheating and potentially causing damage to the engine.Rate this question:
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- 27.
(405) What type of oil seal has soft metal as its basic composition and allows a small amount of airflow to prevent oil seepage?
- A.
Silicone.
- B.
Carbon.
- C.
Synthetic.
- D.
Labyrinth.
Correct Answer
D. Labyrinth.Explanation
A labyrinth oil seal is made of soft metal and allows a small amount of airflow to prevent oil seepage. It is designed with a complex maze-like structure that creates multiple barriers for the oil, making it difficult for it to escape. This type of seal is commonly used in machinery and engines to ensure proper lubrication while minimizing oil leakage.Rate this question:
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- 28.
(405) Use extreme care when working with labyrinth seals because of their
- A.
Soft metal construction; these seals can be damaged easily.
- B.
Soft metal construction; they are sharp and can cut your hand.
- C.
Hard metal construction; they are sharp and can cut your hand.
- D.
Hard metal construction; these seals can damage the bearing races.
Correct Answer
A. Soft metal construction; these seals can be damaged easily.Explanation
The correct answer is "soft metal construction; these seals can be damaged easily." This is because labyrinth seals are made of soft metal, which means they are more susceptible to damage. They can easily be bent, dented, or scratched, leading to a compromised seal and potential leakage. It is important to handle them with extreme care to avoid any damage. The other options are incorrect because they either mention sharpness and cutting, which is not relevant to the construction material, or they mention hard metal construction, which is not true for labyrinth seals.Rate this question:
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- 29.
(405) When an engine is not operating, static preload for a carbon oil seal is provided by
- A.
Air pressure.
- B.
Oil pressure.
- C.
Spring pressure.
- D.
Hydraulic pressure.
Correct Answer
C. Spring pressure.Explanation
When an engine is not operating, the carbon oil seal needs to maintain a static preload to prevent leakage. This preload is provided by spring pressure. The springs in the oil seal apply a constant force on the seal, ensuring that it remains in contact with the shaft and prevents oil from escaping.Rate this question:
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- 30.
(405) Carbon seals should be cleaned by soaking them in clean, warm
- A.
JP–4 for 60 minutes.
- B.
PD–680 for 30 minutes.
- C.
Kerosene for 60 minutes.
- D.
Engine lubricating oil for 30 minutes.
Correct Answer
D. Engine lubricating oil for 30 minutes. -
- 31.
(406) The F100-PW–100 engine oil pressure varies with N2, engine inlet oil temperature, and
- A.
Oil jet pressure.
- B.
Fan turbine speed.
- C.
Oil nozzle condition.
- D.
Number of oil jets used.
Correct Answer
C. Oil nozzle condition.Explanation
The oil pressure in the F100-PW-100 engine varies with factors such as N2 (fan turbine speed), engine inlet oil temperature, and the condition of the oil nozzle. The oil nozzle condition refers to the state of the nozzle through which the oil is sprayed into the engine. If the nozzle is damaged or clogged, it can affect the oil pressure. Therefore, the condition of the oil nozzle is a crucial factor in determining the oil pressure in the engine.Rate this question:
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- 32.
(406) What term is used to indicate that air is being mixed with the oil in the oil pump to create pockets of air?
- A.
Aeration.
- B.
Induction.
- C.
Convection.
- D.
Compression.
Correct Answer
A. Aeration.Explanation
Aeration is the term used to indicate that air is being mixed with the oil in the oil pump to create pockets of air.Rate this question:
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- 33.
(406) The number1, 4, and 5 bearing compartments are capped on the F100-PW–100 engine oil system. Which oil subsystem (or subsystems) do these compartments breathe through?
- A.
Scavenge only.
- B.
Breather only.
- C.
Scavenge and pressure.
- D.
Scavenge and breather.
Correct Answer
A. Scavenge only.Explanation
The number 1, 4, and 5 bearing compartments on the F100-PW-100 engine oil system are capped, which means they are sealed off from the outside environment. These compartments do not have a breather, which means they do not breathe air from the atmosphere. Instead, they rely on the scavenge system to remove any excess oil or contaminants from the compartments. Therefore, the correct answer is "Scavenge only."Rate this question:
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- 34.
(406) Which type of oil system stores the oil in a tank fitted to the side of the engine?
- A.
Dry sump.
- B.
Wet sump.
- C.
Cold tank.
- D.
Hot tank.
Correct Answer
A. Dry sump.Explanation
A dry sump oil system stores the oil in a separate tank that is fitted to the side of the engine. This system is commonly used in high-performance or racing engines because it allows for better oil control and prevents oil starvation during high-speed or high-g turns. The oil is pumped from the tank to lubricate the engine components and then returned to the tank to be cooled and filtered before being recirculated. In contrast, a wet sump system stores the oil in a pan at the bottom of the engine, which is simpler but can lead to oil sloshing and starvation in extreme conditions.Rate this question:
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- 35.
(406) Which type of oil system design places the oil cooler in the pressure subsystem?
- A.
Cold tank.
- B.
Wet tank.
- C.
Dry tank.
- D.
Hot tank.
Correct Answer
D. Hot tank.Explanation
In a hot tank oil system design, the oil cooler is placed in the pressure subsystem. This means that the oil cooler is located after the oil pump, where the oil is pressurized. The purpose of the oil cooler is to cool down the hot oil before it is circulated back into the engine. By placing the oil cooler in the pressure subsystem, the oil is cooled more effectively as it is exposed to higher pressure, allowing for better heat dissipation.Rate this question:
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- 36.
(406) Which type of oil tank design do most fighter aircraft engines incorporate to help with weight savings?
- A.
Wet tank.
- B.
Dry tank.
- C.
Hot tank.
- D.
Cold tank.
Correct Answer
C. Hot tank.Explanation
Most fighter aircraft engines incorporate a hot tank design for oil tanks to help with weight savings. A hot tank design allows for better heat dissipation, reducing the need for additional cooling systems. This helps to save weight and improve overall aircraft performance.Rate this question:
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- 37.
(407) On an F100 engine, the breather pressurizing valve is internally mounted in the
- A.
Oil tank.
- B.
Gearbox.
- C.
Oil filter.
- D.
Oil pump.
Correct Answer
B. Gearbox.Explanation
The correct answer is gearbox. The breather pressurizing valve on an F100 engine is internally mounted in the gearbox. This valve helps to regulate the pressure within the gearbox by allowing excess pressure to be released. It is important for the breather pressurizing valve to be located in the gearbox to ensure proper functioning and to prevent any potential damage or malfunctioning of the engine components.Rate this question:
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- 38.
(407) If the red button on an F100-PW–220 engine oil filter pops out and remains extended, the
- A.
Button is defective.
- B.
Scheduled oil change is due.
- C.
Design ambient pressure has been exceeded.
- D.
Design pressure differential has been exceeded.
Correct Answer
D. Design pressure differential has been exceeded.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. This means that the pressure difference between the inlet and outlet of the oil filter has surpassed the maximum limit set by the design specifications. This could be due to various factors such as a clogged filter, excessive pressure in the engine, or a malfunctioning pressure relief valve. It is important to address this issue promptly to prevent any potential damage to the engine.Rate this question:
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- 39.
(407) On an F100-PW–220 engine, the air/oil coolers are mounted on the fan duct and use
- A.
Secondary fan airflow as a coolant.
- B.
Secondary fan airflow as an oil heater.
- C.
Primary core engine airflow as a coolant.
- D.
Primary core engine airflow as an oil heater.
Correct Answer
A. Secondary fan airflow as a coolant.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 cool the air and oil by utilizing the airflow generated by the secondary fan. This airflow helps to dissipate heat and maintain optimal operating temperatures for the engine.Rate this question:
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- 40.
(407) On an F100-PW–220 engine, what component permits oil to bypass the oil filter during cold weather starts?
- A.
Oil relief valve.
- B.
Filter poppet valve.
- C.
Oil pressure transmitter tap.
- D.
Filter assembly bypass valve.
Correct Answer
D. Filter assembly bypass valve.Explanation
The correct answer is the Filter assembly bypass valve. During cold weather starts, the oil filter can become clogged with cold, thick oil. The filter assembly bypass valve allows the oil to bypass the filter and flow directly to the engine, ensuring that the engine receives the necessary lubrication even if the filter is not functioning optimally. This helps to protect the engine from damage during cold starts.Rate this question:
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- 41.
(407) On an F100-PW–220 engine, which bearing compartments drain into the gearbox by the tower shaft cavity?
- A.
1 and 2.
- B.
1 and 3.
- C.
2 and 3.
- D.
2 and 4.
Correct Answer
C. 2 and 3.Explanation
On an F100-PW-220 engine, bearing compartments 2 and 3 drain into the gearbox by the tower shaft cavity.Rate this question:
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- 42.
(408) How does the AFTLA obtain oil samples for analysis?
- A.
Upon request from the depot.
- B.
Automatically from the depot.
- C.
Upon request from the manufacturer.
- D.
Automatically from the manufacturer.
Correct Answer
D. Automatically from the manufacturer.Explanation
The AFTLA obtains oil samples for analysis automatically from the manufacturer. This means that the manufacturer sends the oil samples to the AFTLA without the need for a specific request. This method ensures a regular and consistent supply of oil samples for analysis, allowing the AFTLA to conduct their analysis and testing efficiently.Rate this question:
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- 43.
(408) The hazardous property of modern jet engine oil the journeyman must be aware of is
- A.
Toxicity.
- B.
Viscosity.
- C.
Alkalinity.
- D.
Corrosiveness.
Correct Answer
D. Corrosiveness.Explanation
The correct answer is corrosiveness. Modern jet engine oil can be corrosive, meaning it has the ability to cause damage or deterioration to materials it comes into contact with. This is an important property for a journeyman to be aware of, as it can impact the maintenance and safety of the aircraft.Rate this question:
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- 44.
(408) Which action concerning open oil containers is correct?
- A.
Dispose of any portion not immediately used.
- B.
Store remaining portion immediately after use.
- C.
Dispose of any portion not used within 60 days.
- D.
Store remaining portion in clearly marked containers.
Correct Answer
A. Dispose of any portion not immediately used.Explanation
The correct action concerning open oil containers is to dispose of any portion not immediately used. This is important because leaving open containers of oil can lead to contamination and the oil can deteriorate over time. It is best to only use what is needed and properly dispose of the excess oil to maintain its quality and prevent any potential hazards.Rate this question:
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- 45.
(409) Through the use of spectrometric oil analysis, aircraft will have a higher in-commission rate because there will be
- A.
More oil sampling.
- B.
More engine removals.
- C.
Less unnecessary maintenance.
- D.
Less wear metal found in the oil.
Correct Answer
C. Less unnecessary maintenance.Explanation
Through the use of spectrometric oil analysis, aircraft can detect potential issues early on, allowing for targeted maintenance and reducing the need for unnecessary maintenance. This means that only necessary maintenance tasks will be performed, resulting in less downtime and a higher in-commission rate for the aircraft.Rate this question:
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- 46.
(409) For bases that do not have an OAP laboratory, who designates the facility to which oil samples are sent?
- A.
Base commander.
- B.
Unit commander.
- C.
Program manager.
- D.
Unit safety officer.
Correct Answer
C. Program manager.Explanation
The program manager is responsible for designating the facility to which oil samples are sent in bases that do not have an OAP laboratory. This is because the program manager oversees the overall maintenance and inspection program, including the analysis of oil samples. The base commander, unit commander, and unit safety officer may have their own responsibilities, but they are not specifically designated to determine the facility for oil sample testing.Rate this question:
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- 47.
(409) Who is responsible for ensuring that the OAP operates properly?
- A.
Project monitor.
- B.
Logistics commander.
- C.
Propulsion flight chief.
- D.
Laboratory supervisor.
Correct Answer
A. Project monitor.Explanation
The project monitor is responsible for ensuring that the OAP (Operational Availability Plan) operates properly. They oversee and monitor the progress of the project, ensuring that all aspects are functioning as intended. This includes coordinating with various team members, tracking the project's performance, and making any necessary adjustments to ensure its success. The project monitor plays a crucial role in ensuring the smooth operation of the OAP.Rate this question:
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- 48.
(409) What are microscopic metallic particles in the oil system called?
- A.
Wear metals.
- B.
Friction metals.
- C.
Precious metals.
- D.
Transformation metals.
Correct Answer
A. Wear metals.Explanation
Microscopic metallic particles in the oil system are called wear metals. These particles are generated as a result of friction and wear between moving parts in the machinery. They can come from various sources such as the engine, transmission, or other mechanical components. Monitoring the levels of wear metals in the oil can provide valuable information about the condition of the machinery and can help identify potential issues or failures before they occur.Rate this question:
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- 49.
(409) Increased friction between moving parts in the oil system
- A.
Accelerates the rate of wear, decreasing the production of wear metal particles.
- B.
Accelerates the rate of wear, increasing the production of wear metal particles.
- C.
Slows the rate of wear, decreasing the production of wear metal particles.
- D.
Slows the rate of wear, increasing the production of wear metal particles.
Correct Answer
B. Accelerates the rate of wear, increasing the production of wear metal particles.Explanation
Increased friction between moving parts in the oil system accelerates the rate of wear, increasing the production of wear metal particles. When there is increased friction, the surfaces of the moving parts rub against each other more vigorously, causing more wear. This wear leads to the generation of wear metal particles, which are small metal fragments that are released into the oil system. Therefore, the correct answer is that increased friction accelerates the rate of wear and increases the production of wear metal particles.Rate this question:
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- 50.
(409) During an OAP sample collection, using your mouth to draw oil up into the plastic tube could result in
- A.
Insufficient oil collection.
- B.
Contaminated samples.
- C.
A minor stomach ache.
- D.
Paralysis or death.
Correct Answer
D. Paralysis or death.Explanation
Using your mouth to draw oil up into the plastic tube during an OAP sample collection can result in paralysis or death. This is because the oil may contain toxic substances or chemicals that can be harmful if ingested. Ingesting these substances can lead to severe health complications, including paralysis or even death. Therefore, it is important to follow proper safety procedures and use the appropriate equipment when collecting oil samples to avoid such risks.Rate this question:
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Mar 21, 2023Quiz Edited by
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Oct 09, 2014Quiz Created by
AustinCope
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