2A6X1 Vol. 5 Ure's (Mfe)

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2A6X1 Vol. 5 Ure

Vol. 5 study guide


Questions and Answers
  • 1. 

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

    • A.

      Discuss problem with other journeymen in the shop

    • B.

      Check each part of every system

    • C.

      Examine the most complex unit

    • D.

      Observe gauge indications

    Correct Answer
    D. Observe gauge indications
    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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  • 2. 

    All of the options listed below are proper troubleshooting practices except

    • A.

      Checking the applicable trouble areas

    • B.

      Understanding the fucnction of each engine unit

    • C.

      Performing easy checks, then going to more difficult checks

    • D.

      Inspecting other areas after isolating the trouble between points

    Correct Answer
    D. Inspecting other areas after isolating the trouble between points
    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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  • 3. 

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

    • A.

      Fix-it diagrams

    • B.

      Power plant charts

    • C.

      Mechanical drawings

    • D.

      Troubleshooting charts

    Correct Answer
    D. Troubleshooting charts
    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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  • 4. 

    To become an expert troubleshooter, you must

    • A.

      Be a 7-level

    • B.

      Have at least 5 years experience

    • C.

      Attend college courses in troubleshootin techniques

    • D.

      Understand th function of each unit within each system

    Correct Answer
    D. Understand th function of each unit within each system
    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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  • 5. 

    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

    • A.

      Data collection unit (DCU

    • B.

      Ground station unit (GSU

    • C.

      Engine analyzer unit (EAU

    • D.

      Engine diagnostic unit (EDU

    Correct Answer
    D. Engine diagnostic unit (EDU
    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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  • 6. 

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

    • A.

      If an engine should be removed from an aircraft

    • B.

      If the engine should be sent to the test cell

    • C.

      The meanings of the instrument readings

    • D.

      What tools are required for maintenance

    Correct Answer
    C. The meanings of the instrument readings
    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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  • 7. 

    Most engine montioring guages and instruments require some type of

    • A.

      Electrical valve to the indicator

    • B.

      Metal tubing for electron flow

    • C.

      Radio frequency transmitter

    • D.

      Transmitter and indicator

    Correct Answer
    D. Transmitter and indicator
    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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  • 8. 

    Which jet engine temperature is not measured?

    • A.

      Exhaust gas

    • B.

      Turbine inlet

    • C.

      Combustion inlet

    • D.

      Fan turbine inlet

    Correct Answer
    C. Combustion inlet
    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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  • 9. 

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

    • A.

      A resistor

    • B.

      A turbine inlet

    • C.

      A control valve

    • D.

      An exhaust duct

    Correct Answer
    A. A resistor
    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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  • 10. 

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

    • A.

      Transmitter and a float valve

    • B.

      Control valve and a float valve

    • C.

      Transmitter adn a fuel-flow indicator

    • D.

      Control valve and a fuel-flow transcriber

    Correct Answer
    C. Transmitter adn a fuel-flow indicator
    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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  • 11. 

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

    • A.

      Fuel-flow generator

    • B.

      Fuel-flow indicator

    • C.

      Fuel-flow transmitter

    • D.

      Fuel remaining counter

    Correct Answer
    C. Fuel-flow transmitter
    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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  • 12. 

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

    • A.

      Pounds per hour

    • B.

      Gallons per hour

    • C.

      Pounds per minute

    • D.

      Gallons per second

    Correct Answer
    A. Pounds per hour
    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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  • 13. 

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

    • A.

      Transmitter and indicator

    • B.

      Relief valve and indicator

    • C.

      Relief valve and transmitter

    • D.

      Synchronous unit and indicator

    Correct Answer
    A. Transmitter and indicator
    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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  • 14. 

    The oil pressure indicator receives an electrical signal from the

    • A.

      Gyro

    • B.

      Transmitter

    • C.

      Hydraulic unit

    • D.

      Synchronous unit

    Correct Answer
    B. Transmitter
    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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  • 15. 

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

    • A.

      Indicator

    • B.

      Fuse panel

    • C.

      Transformer

    • D.

      Thermocouple

    Correct Answer
    A. Indicator
    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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  • 16. 

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

    • A.

      Engine accessory section

    • B.

      Engine turbine section

    • C.

      Combustion case

    • D.

      Fuel control

    Correct Answer
    A. Engine accessory section
    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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  • 17. 

    The tachometer indicator is

    • A.

      An electric direct-drive type instrument

    • B.

      An electric-magnetic-drag-type instrument

    • C.

      A mechanical direct-drive-type instument

    • D.

      A mechanical-magnetic-drag-type instrument

    Correct Answer
    B. An electric-magnetic-drag-type instrument
    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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  • 18. 

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

    • A.

      Helps the pilot determine engine power

    • B.

      Helps the pilot determine fuel consumption

    • C.

      Gives the pilot indications of electrical failures

    • D.

      Aids the pilot in selection of proper altitude levels

    Correct Answer
    A. Helps the pilot determine engine power
    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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  • 19. 

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

    • A.

      Rheostat

    • B.

      Rectifier

    • C.

      Transducer

    • D.

      Transformer

    Correct Answer
    C. Transducer
    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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  • 20. 

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

    • A.

      One gold contact

    • B.

      Two silver contacts

    • C.

      Three bronze contacts

    • D.

      Four copper contacts

    Correct Answer
    B. Two silver contacts
    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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  • 21. 

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

    • A.

      Engine pressure ratio (EPR

    • B.

      Exhaust gas temperature (EGT

    • C.

      Revolutions per minute (RPM

    • D.

      Turbine inlet temperature (TIT

    Correct Answer
    A. Engine pressure ratio (EPR
    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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  • 22. 

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

    • A.

      Engine inlet total pressure and exhaust total pressure

    • B.

      Exhaust total pressure and turbine inlet total pressure

    • C.

      Inlet total pressure and compressor discharge total pressure

    • D.

      Compressor discharge total pressure and trubine inlet total pressure

    Correct Answer
    A. Engine inlet total pressure and exhaust total pressure
    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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  • 23. 

    Inlet pressure (Pt2) is transmitted from its sensing point

    • A.

      Electrically

    • B.

      Mechanically

    • C.

      Hydraulically

    • D.

      Through tubing

    Correct Answer
    D. Through tubing
    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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  • 24. 

    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

    • A.

      Engine transformer

    • B.

      Aircraft transformer

    • C.

      Engine transmitter

    • D.

      Aircraft transmitter

    Correct Answer
    D. Aircraft transmitter
    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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  • 25. 

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

    • A.

      The EGT parameter for transit speeds

    • B.

      Accuracy check switch during adjustment

    • C.

      The EGT indicator to be read in digital or analog

    • D.

      Individual thermocouple inputs or average of these inputs

    Correct Answer
    D. Individual thermocouple inputs or average of these inputs
    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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  • 26. 

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

    • A.

      1 revolutions per minute (RPM

    • B.

      2 RPM

    • C.

      3 RPM

    • D.

      4 RPM

    Correct Answer
    B. 2 RPM
    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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  • 27. 

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

    • A.

      -100 to +1,000*

    • B.

      -75 to +1,400*

    • C.

      -50 to +1,600*

    • D.

      -25 to +1,800*

    Correct Answer
    C. -50 to +1,600*
    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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  • 28. 

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

    • A.

      Forced

    • B.

      Transient

    • C.

      Unbalanced

    • D.

      Externally excited

    Correct Answer
    D. Externally excited
    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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  • 29. 

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

    • A.

      Forced

    • B.

      Transient

    • C.

      Resonance

    • D.

      Externally excited

    Correct Answer
    B. Transient
    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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  • 30. 

    During vibration analysis, frequency is usually measured in

    • A.

      Mils

    • B.

      Phase lags

    • C.

      Cycles per second

    • D.

      Phases per sound

    Correct Answer
    C. Cycles per second
    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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  • 31. 

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

    • A.

      Is a rigid rotor system

    • B.

      Is both a rigid and flexible system

    • C.

      Functions as a flexible rotor system

    • D.

      Acts as an unmeasurable rotation system

    Correct Answer
    C. Functions as a flexible rotor system
    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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  • 32. 

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

    • A.

      The compressor rotor is a freely rotating mass

    • B.

      The main rotor functions as an inflexible system

    • C.

      A change in mechanical condition will not be detected

    • D.

      Displacement may be the same in two completely differnt problems

    Correct Answer
    D. Displacement may be the same in two completely differnt problems
    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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  • 33. 

    The two types fo transducers used to measure vibration are

    • A.

      Velocity and phase accelerometer

    • B.

      Velocity and displacement accelerometer

    • C.

      Velocity and piezoelectric accelerometer

    • D.

      Piezoelctric acceleromether and phase lag transducer

    Correct Answer
    C. Velocity and piezoelectric accelerometer
    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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  • 34. 

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

    • A.

      Velocity

    • B.

      Phase log

    • C.

      Displacement accelerometer

    • D.

      Piezoelectric accelerometer

    Correct Answer
    D. Piezoelectric accelerometer
    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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  • 35. 

    The filter selector switch on the vibration analyzer is used to

    • A.

      Provide an exact revolutions per minute (RPM) indication

    • B.

      Indicate the amplitude of the overall vibration

    • C.

      Display the frequency of the overall engine

    • D.

      Allow selection of the necessary filter

    Correct Answer
    D. Allow selection of the necessary filter
    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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  • 36. 

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

    • A.

      Blades

    • B.

      Bearings

    • C.

      Brackets

    • D.

      Bushings

    Correct Answer
    B. Bearings
    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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  • 37. 

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

    • A.

      Engine trim

    • B.

      Fan rotor trim balance

    • C.

      Low-pressure turbine rotor trim balance

    • D.

      High-pressure turbine rotor trim balance

    Correct Answer
    B. Fan rotor trim balance
    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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  • 38. 

    The carbon seal tester simulates the effects of

    • A.

      Turbine gas flow through the carbon seal

    • B.

      Having no air pressure on the carbon seal

    • C.

      Compressor airflow through the carbon seal

    • D.

      Ambient (outside) pressure on the carbon seal

    Correct Answer
    C. Compressor airflow through the carbon seal
    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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  • 39. 

    The engine remote trimmer enables you to adjust the

    • A.

      Fuel enrchment valve without being under the engine

    • B.

      Fuel flow transmitter while under the engine

    • C.

      Fuel control without being under the engine

    • D.

      Fuel pump while under the engine

    Correct Answer
    C. Fuel control without being under the engine
    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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  • 40. 

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

    • A.

      Supervisory control system (SCS) test set

    • B.

      Mach number (Mn) simulator test set

    • C.

      Engine start system (ESS) tester

    • D.

      Remote trimmer

    Correct Answer
    A. Supervisory control system (SCS) test set
    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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  • 41. 

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

    • A.

      Supervisory control system (SCS) test set

    • B.

      Mach number (Mn) simulator test set

    • C.

      Engine start system (ESS) tester

    • D.

      Remote trimmer

    Correct Answer
    C. Engine start system (ESS) tester
    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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  • 42. 

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

    • A.

      AFI 36-2903

    • B.

      AFOSH STD 91-100

    • C.

      The flight line job guide (JG)

    • D.

      The intermediate maintenance TO

    Correct Answer
    B. AFOSH STD 91-100
    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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  • 43. 

    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

    • A.

      Hydraulic and mechanical

    • B.

      Hydraulic and electronic

    • C.

      Manual and electronic

    • D.

      Manual and mechanical

    Correct Answer
    C. Manual and electronic
    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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  • 44. 

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

    • A.

      Inlet side of the oil pump and the vent system

    • B.

      Output side of the main oil pump and the vent system

    • C.

      Scavenge pump and the inlet side of oil pressure pump

    • D.

      Bearing jets and the output side of the oil scavenge pump

    Correct Answer
    B. Output side of the main oil pump and the vent system
    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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  • 45. 

    When checking the turbine section, you do not measure

    • A.

      Fan turbine inlet teperature (FTIT)

    • B.

      Turbine inlet temperature(TIT)

    • C.

      Exhaust gas temperature (EGT)

    • D.

      Intake gas temperture (IGT)

    Correct Answer
    D. Intake gas temperture (IGT)
    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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  • 46. 

    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?

    • A.

      Dry motoring

    • B.

      Wet motoring

    • C.

      Bleed schedule

    • D.

      Interface operational

    Correct Answer
    A. Dry motoring
    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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  • 47. 

    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

    • A.

      ON

    • B.

      OFF

    • C.

      START

    • D.

      MANUAL

    Correct Answer
    D. MANUAL
    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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  • 48. 

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

    • A.

      2

    • B.

      4

    • C.

      6

    • D.

      8

    Correct Answer
    A. 2
    Explanation
    There are two primary air silencers on aircraft noise suppressors to help reduce turbine whine.

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  • 49. 

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

    • A.

      Near the bleed area

    • B.

      To the rear exhaust area

    • C.

      Against the aircraft fuselage

    • D.

      Forward of the bleed exhaust area

    Correct Answer
    C. Against the aircraft fuselage
    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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  • 50. 

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

    • A.

      2

    • B.

      3

    • C.

      4

    • D.

      5

    Correct Answer
    D. 5
    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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