2A6X1 Vol. 5 Ure's (Mfe)

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Samh5112
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1. Most engine montioring guages and instruments require some type of

Explanation

Most engine monitoring gauges and instruments require a transmitter and indicator. These two components work together to provide information about the engine's performance. The transmitter is responsible for converting the engine's measurements into electrical signals, which are then sent to the indicator. The indicator, in turn, displays the information in a readable format for the operator. Without both the transmitter and indicator, the engine monitoring system would not be able to accurately measure and display important data.

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About This Quiz
2A6X1 Vol. 5 Ure

This quiz assesses knowledge in engine troubleshooting for aircraft maintenance, focusing on practices, troubleshooting charts, and understanding system functions within the F100-PW-220 engine. It is essential for aerospace maintenance professionals.

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2. Using the wrong cleaning agent on a jet engine part

Explanation

Using the wrong cleaning agent on a jet engine part could destroy it. Jet engine parts are made of delicate materials that can be easily damaged by harsh chemicals or cleaning agents. Using the wrong cleaning agent could cause corrosion, erosion, or other forms of damage to the part, leading to its destruction. It is important to use the correct cleaning agent specifically designed for jet engine parts to ensure their proper maintenance and longevity.

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3. The oil pressure indicator receives an electrical signal from the

Explanation

The oil pressure indicator receives an electrical signal from the transmitter. The transmitter is responsible for converting the oil pressure into an electrical signal that can be interpreted by the indicator. This allows the indicator to accurately display the oil pressure level in the system.

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4. Making general entries on the test cell engine log sheet, what should you do with the engine model and serial number?

Explanation

When making general entries on the test cell engine log sheet, it is important to verify the engine model and serial number on the engine data plate. This ensures that the correct and accurate information is recorded on the log sheet. By checking the numbers on the engine data plate, any discrepancies or errors can be avoided, and the log sheet can be filled out correctly.

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5. To become an expert troubleshooter, you must

Explanation

To become an expert troubleshooter, it is essential to understand the function of each unit within each system. This knowledge allows the troubleshooter to identify and diagnose problems accurately. Without understanding how each unit operates and contributes to the overall system, it would be challenging to troubleshoot effectively. The other options mentioned, such as being a 7-level, having experience, and attending college courses, may enhance troubleshooting skills but are not as crucial as understanding the function of each unit within each system.

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6. The engine fuel-flow indicating system of most jet powered aircraft contains a fuel-flow

Explanation

The engine fuel-flow indicating system of most jet powered aircraft consists of a fuel-flow transmitter and a fuel-flow indicator. The transmitter measures the rate at which fuel is flowing to the engine and sends this information to the fuel-flow indicator. The indicator then displays this information to the pilot, allowing them to monitor the fuel consumption of the aircraft.

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7. Two units that work together to indicate that the oil system is operating correctly are the oil pressure

Explanation

The correct answer is transmitter and indicator. The oil pressure transmitter measures the pressure in the oil system and sends a signal to the oil pressure indicator, which displays the pressure reading. These two units work together to indicate whether the oil system is operating correctly.

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8. When an engine arrives for a test run at the test cell, it must

Explanation

When an engine arrives for a test run at the test cell, it must be operable with all known discrepancies corrected. This means that the engine should be in a condition where it can function properly and all issues or problems that were previously identified have been fixed. This ensures that the engine can be tested accurately and any performance or operational data obtained will be reliable. It also indicates that the engine has undergone necessary repairs or maintenance to address any known problems before the test.

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9.
aircraft power plant and engine intermediate maintenance technical order (TO) contain information on troubleshootin. This information is presented in the form of
 

Explanation

The correct answer is troubleshooting charts. Aircraft power plant and engine intermediate maintenance technical orders (TO) provide information on troubleshooting. This information is typically presented in the form of troubleshooting charts, which help technicians identify and resolve issues with the power plant and engine systems. These charts outline a step-by-step process to diagnose and fix problems, making them an essential resource for maintenance personnel.

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10. Responsibility for the proper preventive maintenance of a test cell facility rest with the

Explanation

The correct answer is individuals assigned. The responsibility for the proper preventive maintenance of a test cell facility rests with the individuals who are assigned to it. This means that it is the responsibility of the specific individuals who are assigned to the test cell facility to ensure that preventive maintenance is carried out effectively and regularly. This may include tasks such as regular inspections, cleaning, and servicing of equipment to prevent any potential issues or breakdowns.

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11. On a disassembled engine, a visual inspecton of the combustion chamber is preferred over a borescope inspection because

Explanation

A visual inspection of the combustion chamber on a disassembled engine is preferred over a borescope inspection because it allows for the possibility of spotting defects that may have been missed with the borescope. This suggests that a visual inspection provides a more comprehensive view of the combustion chamber, potentially revealing any hidden or subtle defects that the borescope may have overlooked.

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12. Through extensive testin, engine maufacturers determine how long a particular part should last. this known as the

Explanation

Engine manufacturers determine the expected duration that a specific part should last through extensive testing. This duration is referred to as the "service life." It indicates the estimated lifespan of the part before it is expected to fail or require replacement.

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13. Which type of vibration transducer is made up of certain cermanic comppunds and natural crystals?

Explanation

A piezoelectric accelerometer is made up of certain ceramic compounds and natural crystals. These materials have the property of generating an electric charge when subjected to mechanical stress or vibration. This makes them ideal for use in vibration transducers, as they can convert mechanical vibrations into electrical signals. Therefore, a piezoelectric accelerometer is the correct answer for the type of vibration transducer made up of certain ceramic compounds and natural crystals.

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14. Which of these is not considered a cause of foreign object damge (FOD)?

Explanation

Failure of internal parts is not considered a cause of foreign object damage (FOD) because FOD refers to damage caused by foreign objects that are not part of the aircraft or its components. Formation of ice, ingestion of rocks, and ingestion of bolts are all examples of foreign objects that can cause FOD. However, failure of internal parts is a mechanical issue within the aircraft itself and is not considered a foreign object.

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15. Whch inspection is conducted by maintenance personnel after an occurrence of a specific or unuaual condition?

Explanation

After a specific or unusual condition occurs, maintenance personnel conduct a special inspection. This inspection is carried out to evaluate the condition and determine any necessary repairs or adjustments. Unlike regular inspections, special inspections focus on addressing the specific issue that occurred and ensuring that it is properly resolved.

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16. The two types of test cells currently used in the Air Force are

Explanation

The correct answer is fixed and portable. This is because the question asks for the two types of test cells currently used in the Air Force, and the options provided are fixed and portable, single and combined, permanent and temporary, and functional and progressive. Out of these options, only fixed and portable are types of test cells.

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17. You can get information such as temperature and barometric pressure from equipment at the tecst cell sie or from

Explanation

The control tower is the correct answer because it is responsible for monitoring and controlling all aircraft movements within the airport's airspace. They have access to real-time information such as temperature and barometric pressure through sophisticated equipment and weather monitoring systems. The control tower provides crucial weather updates to pilots, ensuring safe and efficient operations.

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18. A typical jet engine exhaust gas temperaure (EGT) indicating system contains thermocouples, leads, an indicator, and

Explanation

A typical jet engine exhaust gas temperature (EGT) indicating system contains thermocouples, leads, an indicator, and a resistor. The resistor is a crucial component in the system as it helps to calibrate and regulate the temperature readings from the thermocouples. It is used to provide a known reference temperature for comparison, allowing accurate measurement and indication of the EGT. Without the resistor, the system would not be able to provide reliable and consistent temperature readings, making it an essential part of the EGT indicating system.

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19. What kind of engine vibration does not persist, but comes and goes?

Explanation

Transient engine vibration refers to vibrations that occur for a short duration and then disappear. These vibrations are typically caused by temporary factors such as changes in operating conditions or the interaction of different engine components. Unlike other types of engine vibrations like forced, resonance, or externally excited, transient vibrations are not persistent and do not continue for an extended period.

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20. What is used to support the fan and low pressure turbine?

Explanation

Bearings are used to support the fan and low pressure turbine. Bearings are mechanical components that reduce friction between moving parts and support the load. In this case, they provide support to the fan and low pressure turbine, allowing them to rotate smoothly. Without bearings, the fan and turbine would experience increased friction, leading to excessive wear and decreased efficiency. Therefore, bearings play a crucial role in supporting and maintaining the proper functioning of these components.

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21. Which piece of test equipment is used to troubleshoot a jet fuel starter (JFS) problem on an F-16 aircraft?

Explanation

The engine start system (ESS) tester is used to troubleshoot a jet fuel starter (JFS) problem on an F-16 aircraft. This test equipment is specifically designed to diagnose and analyze the functionality of the engine start system, which includes the jet fuel starter. By using the ESS tester, technicians can identify any issues or malfunctions within the JFS and perform necessary repairs or maintenance to ensure proper functioning of the aircraft's engine start system.

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22. To borescope the high-pressure turbine (HPT) rotor blades, rotate the rear compressor by using the core engine rotationg device on the

Explanation

The correct answer is the accessory gearbox. To borescope the high-pressure turbine (HPT) rotor blades, the rear compressor needs to be rotated. This rotation is achieved by using the core engine rotating device, which is connected to the accessory gearbox. Therefore, the accessory gearbox is the component that allows for the rotation of the rear compressor, enabling the borescoping of the HPT rotor blades.

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23. The fuel-flow indicator indicates the rate of fuel-flow as

Explanation

The fuel-flow indicator is a device that measures the rate at which fuel is flowing through the system. It provides information about the amount of fuel consumed over a specific period of time. The most commonly used unit for measuring fuel flow is pounds per hour, as it provides a standardized measurement across different aircraft and fuel types. This allows pilots and maintenance personnel to accurately monitor fuel consumption and make informed decisions regarding fuel management.

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24. The engine remote trimmer enables you to adjust the

Explanation

The engine remote trimmer allows you to adjust the fuel control without needing to be physically under the engine. This means that you can make changes to the fuel control system from a remote location, which is convenient and safer than having to access the engine directly.

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25. Which F-16 operational check allows you to start the jet fuel satrty (JFS) without advancing the throttle to idle or supplying fuel to the aircraft engine?

Explanation

Dry motoring is the correct answer because it is an operational check that allows starting the Jet Fuel Start (JFS) without advancing the throttle to idle or supplying fuel to the aircraft engine. This check is performed to ensure that the JFS is functioning properly and can provide the necessary airflow and pressure to start the engine. By using dry motoring, the JFS can be tested without the risk of starting the engine or introducing fuel into the system.

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26. Before moving an aircraft into the hush house, you must inspect the aircraft

Explanation

Before moving an aircraft into the hush house, it is necessary to inspect the aircraft and its forms. This means that not only the physical condition of the aircraft should be checked, but also any required documentation or paperwork related to the aircraft should be reviewed. This ensures that the aircraft is in proper working order and that all necessary paperwork is in order before it is moved into the hush house.

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27. Which engine area should be checked for foreign object damage (FOD) prior to operation on the test cell facility?

Explanation

Foreign object damage (FOD) refers to any damage caused by foreign objects, such as debris or particles, entering the engine. The turbine area is the part of the engine where combustion occurs and where the turbine blades are located. It is a critical area that is susceptible to FOD, as any foreign objects entering this area can cause damage to the turbine blades, leading to engine malfunction or failure. Therefore, prior to operation on the test cell facility, it is important to check the turbine area for any signs of FOD to ensure the engine's proper functioning.

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28. An understanding of the operating principles of engine instruments will help you decide

Explanation

Understanding the operating principles of engine instruments is important in order to interpret the readings they provide. By understanding the meanings of the instrument readings, one can determine the current condition and performance of the engine. This knowledge is crucial in making decisions such as whether the engine should be removed from the aircraft or sent to the test cell for further evaluation. Additionally, understanding the instrument readings can also help identify any maintenance or repair needs and determine the tools required for maintenance.

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29. Engines are mounted in the fixed test cell on a thrust stand or are suspended

Explanation

The engines are mounted from a cradle mount. This means that the engines are secured and supported by a cradle-like structure. This method allows for stability and ease of testing, as the engines can be easily attached and detached from the cradle mount. It also ensures that the engines are securely held in place during testing, preventing any movement or accidents.

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30. Defects (such as cracks) that appear on the combustion chamber are aggravated by

Explanation

Thermal cycles refer to the repeated heating and cooling of the combustion chamber in an engine. These cycles cause expansion and contraction of the materials, which can lead to the formation or worsening of defects such as cracks. As the chamber heats up and cools down, the stress on the materials increases, making them more susceptible to damage. Therefore, thermal cycles aggravate the defects that appear on the combustion chamber.

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31. All of the options listed below are proper troubleshooting practices except

Explanation

Inspecting other areas after isolating the trouble between points is not a proper troubleshooting practice because it can lead to wasting time and resources. Once the trouble has been isolated between specific points, it is more efficient to focus on those points and perform targeted checks and inspections to identify the root cause of the problem. Inspecting other areas before fully understanding the issue between the identified points can cause unnecessary confusion and delay in resolving the problem.

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32. The two primary units of the tachometer indicating system are the tachometer generator and tachometer

Explanation

The tachometer indicating system consists of two primary units: the tachometer generator and the tachometer indicator. The tachometer generator is responsible for generating the electrical signal based on the rotational speed of the engine. This signal is then sent to the tachometer indicator, which displays the RPM (revolutions per minute) of the engine on a gauge or digital display. Therefore, the correct answer is "indicator" as it is one of the primary units of the tachometer indicating system.

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33. What information is used as an aid in test facility inspectons?

Explanation

Periodic inspection checklists are used as an aid in test facility inspections. These checklists provide a systematic and comprehensive list of items that need to be inspected during a specific period. They ensure that all necessary areas, equipment, and procedures are thoroughly examined and meet the required standards. By using periodic inspection checklists, test facility inspectors can easily track and document any issues or deficiencies, allowing for timely corrective actions to be taken.

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34. During vibration analysis, why is it necessary to meausre all parameters to identify a vibration source?

Explanation

When conducting vibration analysis, it is necessary to measure all parameters to identify a vibration source because displacement alone may not provide enough information. Displacement refers to the distance an object moves from its equilibrium position during vibration. However, different vibration sources can result in the same displacement, making it difficult to pinpoint the exact cause of the vibration. By measuring all parameters such as frequency, amplitude, and phase, a more comprehensive analysis can be performed, allowing for a more accurate identification of the vibration source.

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35. If an engine stalls or surges during a test cell run, you should investigate the

Explanation

If an engine stalls or surges during a test cell run, the variable stator vanes should be investigated. Variable stator vanes are responsible for controlling the airflow and pressure within the engine. If these vanes are malfunctioning or not operating correctly, it can cause disruptions in the engine's performance, leading to stalling or surging. Therefore, investigating the variable stator vanes is crucial in identifying and resolving the issue.

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36. Defects (such as cracks) found during combustion chamber borescope inspections

Explanation

During combustion chamber borescope inspections, defects such as cracks are continually monitored as long as they are within limits. This means that if the defects do not exceed the acceptable limits set by the inspection criteria, they do not require immediate action such as engine removal or welding. However, they are still monitored to ensure that they do not worsen or exceed the limits in the future. Replacing the part is only necessary if the defects become unacceptable and exceed the specified limits.

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37. A basic post-flight inspection (BPO) is done

Explanation

The correct answer is "after the last flight of the flying period." A basic post-flight inspection (BPO) is conducted after the last flight of the flying period to ensure that the aircraft is in a safe and operational condition before it is parked or stored. This inspection allows for any issues or damages that may have occurred during the flight to be identified and addressed before the aircraft is used again. Conducting the BPO after the last flight of the flying period ensures that the aircraft is thoroughly inspected and ready for the next day's operations.

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38. After reviewing the aircraft/engine forms, where should you begin troubleshooting?

Explanation

When troubleshooting an aircraft/engine issue, it is important to start by observing gauge indications. This is because gauge indications provide valuable information about the performance and condition of various systems. By observing the gauge indications, one can identify any abnormalities or deviations from normal operating parameters, which can help in narrowing down the potential causes of the problem. This initial step can save time and effort by providing a starting point for further investigation and troubleshooting.

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39. After running an engine in augmentation in the hush house, the augmentor tube is cooled by running the engine at idle for a period of

Explanation

After running an engine in augmentation in the hush house, the augmentor tube needs to be cooled down. This is done by running the engine at idle for a period of 3 minutes. This allows the hot gases in the augmentor tube to dissipate and the temperature to decrease, preventing any potential damage or overheating. Running the engine at idle for a longer period of time, such as 6 or 9 minutes, may not be necessary and could waste fuel and time. Running the engine at idle for only 1 minute may not be sufficient to fully cool down the augmentor tube.

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40. The exhaust nozzle position indicating system found on engines with afterburners is important because it

Explanation

The exhaust nozzle position indicating system found on engines with afterburners is important because it helps the pilot determine engine power. This system provides the pilot with information about the position of the exhaust nozzle, which directly affects the engine's thrust output. By knowing the position of the nozzle, the pilot can accurately gauge the amount of power being produced by the engine, allowing for better control and optimization of engine performance.

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41.
you cna find written instruction for safe flight line vehicle operations in
 

Explanation

The correct answer is AFOSH STD 91-100. This document provides written instructions for safe flight line vehicle operations. The other options listed are not specifically related to flight line vehicle operations. AFI 36-2903 is the Air Force instruction for dress and appearance of Air Force personnel. The flight line job guide (JG) is a general guide for various job duties on the flight line. The intermediate maintenance TO (Technical Order) is a manual for maintenance procedures and operations. Therefore, AFOSH STD 91-100 is the most relevant document for safe flight line vehicle operations.

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42. During an inspection of the hush house you are not required ot check the

Explanation

During an inspection of the hush house, the engine being tested does not need to be checked. This is because the purpose of the hush house is to reduce noise and contain the sound of the engine being tested. Therefore, it is assumed that the engine is already in proper working condition and does not need to be inspected during this specific inspection.

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43. Which testing engine is equipped witha quick engine change (QEC) kit?

Explanation

The TF39-1C testing engine is equipped with a quick engine change (QEC) kit.

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44. Whit is used to indicate the amount of thrust a dual-compressor engine is producing?

Explanation

The engine pressure ratio (EPR) is used to indicate the amount of thrust a dual-compressor engine is producing. EPR is a measure of the pressure difference between the compressor inlet and the turbine outlet, which directly relates to the engine's performance and thrust output. By monitoring the EPR, pilots and engineers can assess the engine's efficiency and make necessary adjustments to optimize its performance.

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45. One type of overheat detector unit used on aircraft engines consists of a hollow stailess-steel tube that covers

Explanation

The correct answer is two silver contacts. The overheat detector unit on aircraft engines consists of a hollow stainless-steel tube that covers two silver contacts. These contacts are designed to detect excessive heat and trigger a warning or shut off the engine if necessary. The silver contacts have good electrical conductivity and are able to accurately detect temperature changes, making them suitable for this application.

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46. In the fixed test cell, air for the engine intake comes through baffles located on the

Explanation

In the fixed test cell, the air for the engine intake comes through baffles located on the ceiling of the test cell. This means that the air is being drawn in from the top of the test cell. The baffles help to control the flow of air and ensure that it is directed towards the engine intake. By having the intake located on the ceiling, it allows for a more efficient and controlled airflow into the engine.

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47. In addition to determining the condition of a repaired or overhauled engine, you also test engines

Explanation

Engines that have been involved in an incident or a mishap need to be tested in addition to determining the condition of a repaired or overhauled engine. This is because the incident or mishap may have caused damage or affected the performance of the engine. Testing these engines is important to ensure their functionality and safety before they are put back into service. The other options mentioned, such as training practice, in aircraft that have been washed, or with severe foreign object damage, may also require engine testing, but the primary focus in this case is on engines that have been involved in an incident or mishap.

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48. What inspection is done on aircraft parts that require infrequent inspections?

Explanation

Periodic (PE) inspections are done on aircraft parts that require infrequent inspections. These inspections are carried out at specified intervals, usually based on flight hours, calendar time, or cycles, to ensure the continued airworthiness of the aircraft and its components. These inspections involve a thorough examination of various systems, structures, and components to identify any signs of wear, damage, or deterioration that may affect the safe operation of the aircraft.

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49. The fuel system component of a jet engine that operates by using water wheel concept is the

Explanation

The fuel-flow transmitter is the correct answer because it is the component in a jet engine's fuel system that operates using the water wheel concept. This means that it measures the flow rate of fuel in the engine by using a rotating wheel that is turned by the flow of fuel. The transmitter then sends this information to the fuel-flow indicator, which displays the flow rate to the pilot. The fuel-flow generator and fuel remaining counter are not directly related to the water wheel concept.

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50. When properly adjusted, the accuracy of the text cell N1 and N2 speed indicator will be within

Explanation

When properly adjusted, the accuracy of the text cell N1 and N2 speed indicator will be within 2 RPM. This means that the speed indicated by the cell will be within 2 revolutions per minute of the actual speed. This level of accuracy is considered acceptable for most applications and allows for minor variations in the indicated speed without affecting the overall performance or functionality of the device.

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51. The filter selector switch on the vibration analyzer is used to

Explanation

The filter selector switch on the vibration analyzer allows the user to choose the appropriate filter for analyzing the vibration data. Different filters can be used to isolate specific frequencies or remove unwanted noise from the signal. By selecting the necessary filter, the user can ensure that the vibration data is accurately analyzed and any relevant information is obtained.

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52. The vibration pickups on the portable test cell are cooled by

Explanation

The vibration pickups on the portable test cell are cooled by the pneumatic system. This means that the pneumatic system is responsible for cooling the vibration pickups. It is likely that the pneumatic system has a cooling mechanism or feature that allows it to cool the pickups effectively. This could be through the circulation of air or some other method. The other options, such as engine oil, the atmosphere, and hydraulic fluid, are not mentioned as being responsible for cooling the pickups, so they are not the correct answer.

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53. To prevent damage to the load cells when you are transfering an engine to the test stand,

Explanation

To prevent damage to the load cells when transferring an engine to the test stand, securing the upper and lower rails is necessary. This ensures that the engine is held in place securely during the transfer, minimizing any potential movement or vibrations that could harm the load cells. By properly securing the rails, the load cells can accurately measure the engine's weight and any changes in force during the testing process.

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54. The tachometer indicator is

Explanation

The correct answer is "an electric-magnetic-drag-type instrument." This means that the tachometer indicator operates using an electric-magnetic-drag mechanism. This type of instrument uses a combination of electrical and magnetic forces to measure and display the speed of rotation of an engine or motor. The drag created by the electrical and magnetic forces allows the indicator to accurately reflect the speed of rotation.

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55. On engines with afterburners, the position of the exhaust nozzle is converted into an electrical signal by a

Explanation

A transducer is a device that converts one form of energy into another form. In the context of engines with afterburners, the position of the exhaust nozzle needs to be measured and converted into an electrical signal for control purposes. A transducer is the most appropriate device for this task as it can convert the mechanical position of the nozzle into an electrical signal that can be easily processed and used for control. A rheostat, rectifier, or transformer are not suitable for this purpose as they do not have the capability to directly convert mechanical motion into an electrical signal.

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56. The test cell exhaust gas temperature (EGT) selector allows selection of

Explanation

The test cell exhaust gas temperature (EGT) selector allows the selection of individual thermocouple inputs or the average of these inputs. This means that the EGT parameter can be measured using multiple thermocouples, and the selector allows the user to choose whether to display the temperature from each individual thermocouple or the average temperature from all the thermocouples. This provides flexibility in monitoring and analyzing the EGT parameter based on the specific requirements or preferences of the user.

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57. A portable test cell is not equipped with a

Explanation

A portable test cell is a mobile unit used for testing aircraft engines. It is designed to be easily transportable and does not require a control cab, thrust trailer, or miscellaneous equipment kit as these components are typically not needed for testing purposes. However, a hydraulically operated pylon mount cradle is necessary for safely mounting and securing the engine during testing. Therefore, the correct answer is the hydraulically operated pylon mount cradle.

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58. The F100-PW-220 engine monitoring system component that acquires fault data from the digital electonic engine control (DEEC) and logs the faults with the time of their occurrence is the

Explanation

The engine diagnostic unit (EDU) is responsible for acquiring fault data from the digital electronic engine control (DEEC) and logging the faults with the time of their occurrence. This component is specifically designed to monitor the engine's performance and identify any issues or malfunctions. It collects data from the DEEC and records the faults, allowing maintenance personnel to analyze and diagnose any problems that may arise. Therefore, the EDU is the correct answer in this case.

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59. The N2 tachometer generator is usually driven from the tachometer drive located on the

Explanation

The N2 tachometer generator is typically driven from the tachometer drive located on the engine accessory section. This section of the engine houses various components such as the starter, generator, and fuel pump. Since the tachometer generator is responsible for measuring the rotational speed of the N2 turbine, it makes sense for it to be driven from the engine accessory section where these components are located.

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60. The two types fo transducers used to measure vibration are

Explanation

The correct answer is velocity and piezoelectric accelerometer. Velocity accelerometers measure the rate at which an object is vibrating, while piezoelectric accelerometers use the piezoelectric effect to convert mechanical energy into an electrical signal. This combination of velocity and piezoelectric accelerometers allows for accurate measurement of vibration.

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61. The carbon seal tester simulates the effects of

Explanation

The carbon seal tester is used to replicate the conditions of compressor airflow through the carbon seal. This means that it is designed to mimic the effects of the air pressure and flow that occurs when gas flows through the carbon seal in a turbine. By simulating this compressor airflow, the carbon seal tester can accurately assess the performance and durability of the carbon seal in real-world conditions.

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62. The term trim means to adjust the engine systems for optimum performance per the limits in the TO. there are two methods used to trim an engine. they are

Explanation

The term "trim" refers to adjusting the engine systems for optimal performance within the limits specified in the technical order (TO). There are two methods used to trim an engine, which are manual and electronic. This means that both manual adjustments and electronic controls are utilized to achieve the desired performance of the engine.

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63. When checking the turbine section, you do not measure

Explanation

When checking the turbine section, you do not measure the intake gas temperature (IGT). The turbine section of a turbine engine is responsible for extracting energy from the hot gases produced by the combustion process. To monitor the performance and health of the turbine section, various temperatures are measured, such as the fan turbine inlet temperature (FTIT), turbine inlet temperature (TIT), and exhaust gas temperature (EGT). However, the intake gas temperature (IGT) is not typically measured in this context.

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64. Which jet engine temperature is not measured?

Explanation

The temperature of the combustion inlet is not measured in a jet engine. This is because the combustion inlet is the location where the fuel is injected and ignited, and it is where the highest temperatures are reached. Measuring the temperature at this point would be challenging and potentially dangerous due to the extreme heat and flames present. Instead, other points in the engine, such as the exhaust gas, turbine inlet, and fan turbine inlet, are typically measured to monitor and control the engine's performance.

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65. The test cell 1C temperature indicator displays temperatures in degrees Fahrenheit, with a range of

Explanation

The correct answer is -50 to +1,600*. This range indicates that the test cell 1C temperature indicator can display temperatures as low as -50 degrees Fahrenheit and as high as +1,600 degrees Fahrenheit.

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66. Where would you begin your investiagation of an engine with a possible oil consumption problem?

Explanation

To investigate an engine with a possible oil consumption problem, reviewing AFTO Form 781H, Aerospace Vehicle Flight Status and Maintenance, would be the best starting point. This form provides information about the flight status and maintenance of the aerospace vehicle, which includes details about any oil-related issues. By reviewing this form, one can gather insights into the engine's history, maintenance records, and any previous indications of oil consumption problems, helping to identify potential causes and solutions.

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67. During vibration analysis, frequency is usually measured in

Explanation

During vibration analysis, frequency is usually measured in cycles per second. This is because frequency refers to the number of complete cycles or oscillations that occur in one second. Cycles per second, also known as hertz (Hz), is a standard unit of measurement for frequency. It is used to quantify the rate at which a vibrating object or wave repeats its motion or pattern. Measuring frequency in cycles per second allows for accurate analysis and comparison of vibrations in various systems or components.

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68. During what inspection phase are opertional checks made according to the technical order (TO)?

Explanation

During the post-inspection phase, operational checks are made according to the technical order (TO). This phase occurs after the inspection is completed and is done to ensure that all systems and components are functioning properly. Operational checks are conducted to verify that the equipment or system is in good working condition and ready for use.

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69. Hich test cell noise suppressors use water to cool the exhaust gases?

Explanation

Both fixed and portable test cell noise suppressors use water to cool the exhaust gases. This is because water is an effective coolant and can help reduce the temperature of the exhaust gases, preventing overheating and potential damage to the suppressor. Using water as a cooling agent ensures that the suppressor can effectively and safely operate in both fixed and portable test cell environments.

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70. On the portable test cell, the swivel pads at the bottom of the leveling jacks ont he engine thrust trailer provide for all of the following except

Explanation

The swivel pads at the bottom of the leveling jacks on the engine thrust trailer provide for all of the following except supporting the thrust trailer at a height of 80 inches. The swivel pads are designed to level the engine being tested, remove the wheel and tire assemblies, and adjust for rail compatibility with engine transportation trailers. However, they are not intended to support the thrust trailer at a height of 80 inches.

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71. Inlet pressure (Pt2) is transmitted from its sensing point

Explanation

The correct answer is through tubing. This means that the inlet pressure (Pt2) is transmitted from its sensing point to another location electrically, mechanically, or hydraulically using tubing. This suggests that there is a physical connection, likely in the form of a tube, that allows the pressure to be measured and transmitted to a different location.

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72. What type of vibration causes unneccessary engine removals and unwarranted repairs?

Explanation

Externally excited vibrations refer to vibrations that are caused by external factors or forces acting on the engine, such as misalignment, improper mounting, or external sources of vibration. These vibrations can lead to unnecessary engine removals and repairs because they are not inherent to the engine itself, but rather caused by external factors. Therefore, identifying and addressing these externally excited vibrations is crucial in preventing unnecessary engine removals and unwarranted repairs.

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73. Where are the primary silencers positioned on an aircraft noise suppressor?

Explanation

The primary silencers on an aircraft noise suppressor are positioned against the aircraft fuselage. This placement allows them to effectively reduce and absorb the noise generated by the engines before it reaches the surrounding environment. By positioning the silencers against the aircraft fuselage, the noise can be contained and minimized, contributing to a quieter flying experience for passengers and reducing noise pollution in the surrounding areas.

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74. What procedure is used to ensure the fan and low pressure trubine are correctly balanced?

Explanation

The procedure used to ensure the fan and low-pressure turbine are correctly balanced is fan rotor trim balance. This involves adjusting the fan rotor to achieve the desired balance, ensuring that it spins smoothly and evenly. This is important for the overall performance and efficiency of the engine, as an unbalanced fan rotor can cause vibrations and potentially damage the engine components. By properly balancing the fan rotor, the engine can operate smoothly and efficiently.

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75. How many primary air silencers are there on aircraft noise suppressors to help reduce turbine whine?

Explanation

There are two primary air silencers on aircraft noise suppressors to help reduce turbine whine.

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76. During an inspection, compressor blade defects that are within limits are

Explanation

During an inspection, compressor blade defects that are within limits are blended. This means that instead of replacing the entire blade, only the damaged portion is smoothed out or reshaped to restore its proper functioning. This process helps to maintain the integrity of the blade while minimizing the need for costly replacements.

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77. The pressures used in the operationof the engine pressure ration (EPR) system are the

Explanation

The correct answer is engine inlet total pressure and exhaust total pressure. The EPR system in an engine measures the ratio of the engine inlet total pressure to the exhaust total pressure. This ratio is important in determining the performance and efficiency of the engine. By comparing these two pressures, the EPR system can provide valuable information about the engine's operation and help optimize its performance.

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78. Which one is not an inspection phase?

Explanation

The correct answer is "home station check (HSC)". The other options - fix, look, and preinspection - all suggest activities that can be considered as inspection phases. However, a home station check (HSC) is not typically categorized as an inspection phase. It is a maintenance activity that is conducted to ensure the overall readiness and functionality of equipment or systems at a home station.

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79. When connected to the engine, which piece of F100-PW-100 engine test equipment becomes an engine electronic control (EEC)?

Explanation

The supervisory control system (SCS) test set becomes an engine electronic control (EEC) when connected to the engine. The SCS test set is specifically designed to simulate and test the functions of the EEC, which is responsible for monitoring and controlling various engine parameters. By connecting the SCS test set to the engine, it effectively takes on the role of the EEC, allowing for testing and troubleshooting of the engine's electronic control system.

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80. The pressure gauges used for an oil system pressure checks are connected at the

Explanation

The correct answer is the output side of the main oil pump and the vent system. This is because connecting the pressure gauges at the output side of the main oil pump allows for accurate measurement of the pressure generated by the pump. Additionally, connecting the gauges at the vent system ensures that any pressure buildup or abnormalities in the system can be detected and monitored.

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81. The direct oil pressure gauge on a test cell is connected to an engine oil pressure line. this configuration will indicate oil pressure without using wiring, indicator, or

Explanation

The direct oil pressure gauge on a test cell is connected to an engine oil pressure line. This configuration eliminates the need for wiring, an indicator, or an engine transformer. Instead, an aircraft transmitter is used to transmit the oil pressure readings directly to the gauge. This allows for a more efficient and accurate measurement of the oil pressure in the engine.

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82. The hush house exhaust deflector is constructed of

Explanation

The hush house exhaust deflector is constructed of small panel modules filled with noise reduction material. This means that the exhaust deflector is made up of small panels that contain noise reduction material. These panels are designed to reduce the noise produced by the exhaust, making the hush house quieter.

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83. The vertical baffles inteh exhaust stack of the fixed test cell are desighned to remove

Explanation

The vertical baffles in the exhaust stack of the fixed test cell are designed to remove low-frequency sound. Baffles are used to control and reduce noise levels by absorbing or reflecting sound waves. In this case, the vertical baffles are specifically designed to target and eliminate low-frequency sound, which typically has longer wavelengths and can be more difficult to attenuate compared to high-frequency sound. By removing low-frequency sound, the baffles help to reduce overall noise levels and create a quieter environment in the test cell.

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84. To how many minutes should engine operation in afterburner to be limited when the engine is operated in the aircraft noise suppressor?

Explanation

In the given question, the correct answer is 5. This implies that the engine operation in afterburner should be limited to 5 minutes when the engine is operated in the aircraft noise suppressor. This limitation is likely due to the fact that afterburner operation generates excessive noise, which is undesirable in certain situations. By limiting the afterburner operation to 5 minutes, the aircraft can effectively suppress noise levels and comply with noise regulations.

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85. The noise suppressor at a oportable test cell is not equipped with

Explanation

The noise suppressor at a portable test cell is not equipped with a fuel trailer. This means that the noise suppressor does not require a fuel trailer to operate or function properly. The fuel trailer is not necessary for the noise suppressor to suppress noise effectively.

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86. The portable test cell is not equipped with a

Explanation

The portable test cell is not equipped with a model 3000 trailer. This suggests that the test cell has all the other trailers mentioned (fuel trailer, thrust trailer, control cab trailer) except for the model 3000 trailer.

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87. Forces acting to create vibration in a jet engine present a highly complex pattern. this because the main rotor

Explanation

The forces acting to create vibration in a jet engine present a highly complex pattern because the main rotor functions as a flexible rotor system. This means that the main rotor is not rigid and can bend or flex under the forces and stresses it experiences during operation. This flexibility allows the rotor to absorb and dampen vibrations, reducing the overall vibration levels in the engine. Therefore, the complex pattern of forces acting on the engine is a result of the rotor's ability to flex and adapt to the dynamic operating conditions.

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88. The home station check (HSC) inspection is a combination of the basic post-flight (BPO) and

Explanation

The HSC inspection combines the basic post-flight (BPO) and hourly post-flight items. This means that during the HSC inspection, both the BPO items and the hourly post-flight items are checked. The other options, such as thruflight, phased items, and periodic items, are not included in the HSC inspection.

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89. When testing a TF34 engine at test cell, which test is performed to ensure all operating limits and schedules from idle to maximum power are within limits?

Explanation

The correct answer is transient check. During a transient check, the TF34 engine is tested to ensure that all operating limits and schedules, from idle to maximum power, are within the specified limits. This test is important to ensure that the engine can smoothly transition between different power settings and can handle sudden changes in operating conditions without exceeding any limits. It helps to identify any issues or abnormalities in the engine's performance during transient operations.

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90. Prior to starting the engine when doinga n anti-ice valve operational check on an F-16C/D, place the anti-ice engine switch to

Explanation

The correct answer is MANUAL. Prior to starting the engine, when performing an anti-ice valve operational check on an F-16C/D, the anti-ice engine switch should be placed in the MANUAL position. This allows the pilot to manually control the anti-ice valve and ensure its proper functioning before starting the engine.

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The oil pressure indicator receives an electrical signal from the
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Two units that work together to indicate that the oil system is...
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Which type of vibration transducer is made up of certain cermanic...
Which of these is not considered a cause of foreign object damge...
Whch inspection is conducted by maintenance personnel after an...
The two types of test cells currently used in the Air Force are
You can get information such as temperature and barometric pressure...
A typical jet engine exhaust gas temperaure (EGT) indicating system...
What kind of engine vibration does not persist, but comes and goes?
What is used to support the fan and low pressure turbine?
Which piece of test equipment is used to troubleshoot a jet fuel...
To borescope the high-pressure turbine (HPT) rotor blades, rotate the...
The fuel-flow indicator indicates the rate of fuel-flow as
The engine remote trimmer enables you to adjust the
Which F-16 operational check allows you to start the jet fuel satrty...
Before moving an aircraft into the hush house, you must inspect the...
Which engine area should be checked for foreign object damage (FOD)...
An understanding of the operating principles of engine instruments...
Engines are mounted in the fixed test cell on a thrust stand or are...
Defects (such as cracks) that appear on the combustion chamber are...
All of the options listed below are proper troubleshooting practices...
The two primary units of the tachometer indicating system are the...
What information is used as an aid in test facility inspectons?
During vibration analysis, why is it necessary to meausre all...
If an engine stalls or surges during a test cell run, you should...
Defects (such as cracks) found during combustion chamber borescope...
A basic post-flight inspection (BPO) is done
After reviewing the aircraft/engine forms, where should you begin...
After running an engine in augmentation in the hush house, the...
The exhaust nozzle position indicating system found on engines with...
You cna find written instruction for safe flight line vehicle...
During an inspection of the hush house you are not required ot check...
Which testing engine is equipped witha quick engine change (QEC) kit?
Whit is used to indicate the amount of thrust a dual-compressor engine...
One type of overheat detector unit used on aircraft engines consists...
In the fixed test cell, air for the engine intake comes through...
In addition to determining the condition of a repaired or overhauled...
What inspection is done on aircraft parts that require infrequent...
The fuel system component of a jet engine that operates by using...
When properly adjusted, the accuracy of the text cell N1 and N2 speed...
The filter selector switch on the vibration analyzer is used to
The vibration pickups on the portable test cell are cooled by
To prevent damage to the load cells when you are transfering an engine...
The tachometer indicator is
On engines with afterburners, the position of the exhaust nozzle is...
The test cell exhaust gas temperature (EGT) selector allows selection...
A portable test cell is not equipped with a
The F100-PW-220 engine monitoring system component that acquires fault...
The N2 tachometer generator is usually driven from the tachometer...
The two types fo transducers used to measure vibration are
The carbon seal tester simulates the effects of
The term trim means to adjust the engine systems for optimum...
When checking the turbine section, you do not measure
Which jet engine temperature is not measured?
The test cell 1C temperature indicator displays temperatures in...
Where would you begin your investiagation of an engine with a possible...
During vibration analysis, frequency is usually measured in
During what inspection phase are opertional checks made according to...
Hich test cell noise suppressors use water to cool the exhaust gases?
On the portable test cell, the swivel pads at the bottom of the...
Inlet pressure (Pt2) is transmitted from its sensing point
What type of vibration causes unneccessary engine removals and...
Where are the primary silencers positioned on an aircraft noise...
What procedure is used to ensure the fan and low pressure trubine are...
How many primary air silencers are there on aircraft noise suppressors...
During an inspection, compressor blade defects that are within limits...
The pressures used in the operationof the engine pressure ration (EPR)...
Which one is not an inspection phase?
When connected to the engine, which piece of F100-PW-100 engine test...
The pressure gauges used for an oil system pressure checks are...
The direct oil pressure gauge on a test cell is connected to an engine...
The hush house exhaust deflector is constructed of
The vertical baffles inteh exhaust stack of the fixed test cell are...
To how many minutes should engine operation in afterburner to be...
The noise suppressor at a oportable test cell is not equipped with
The portable test cell is not equipped with a
Forces acting to create vibration in a jet engine present a highly...
The home station check (HSC) inspection is a combination of the basic...
When testing a TF34 engine at test cell, which test is performed to...
Prior to starting the engine when doinga n anti-ice valve operational...
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