Volume 5. Jet Engine Troubleshooting, Operation, Testing, And Damage Analysis
Military questions
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 indicationsExplanation
To begin troubleshooting after reviewing the aircraft/engine forms, one should observe gauge indications. This is because gauge indications provide real-time information about the performance and functioning of various systems in the aircraft/engine. By observing the gauge indications, one can identify any anomalies or deviations from normal readings, which can help in pinpointing the specific system or unit that may be experiencing a problem. This approach allows for a more targeted and efficient troubleshooting process, as it focuses on the areas that are showing abnormal readings or indications.Rate this question:
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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 pointsExplanation
The correct answer is inspecting other areas after isolating the trouble between points. This is not a proper troubleshooting practice because once the trouble has been isolated between specific points, it is important to focus on those points and not waste time inspecting other areas that are unrelated to the issue. This can lead to confusion and delays in resolving the problem.Rate this question:
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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 chartsExplanation
The correct answer is troubleshooting charts. Aircraft power plant and engine intermediate maintenance technical orders (TO) provide information on troubleshooting, which is presented in the form of troubleshooting charts. These charts help maintenance personnel to identify and resolve issues with the aircraft's power plant and engine systems. They typically include step-by-step instructions and flowcharts to guide the troubleshooting process and ensure efficient and accurate problem-solving.Rate this question:
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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 systemExplanation
To become an expert troubleshooter, it is important to understand the function of each unit within each system. This knowledge allows the troubleshooter to identify and diagnose problems accurately. By understanding how each unit works and how it interacts with other units in the system, the troubleshooter can effectively troubleshoot and resolve issues. This comprehensive understanding ensures that the troubleshooter is equipped with the necessary knowledge to handle any troubleshooting scenario.Rate this question:
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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 the component of the F100-PW-220 engine monitoring system that acquires fault data from the digital electronic engine control (DEEC) and logs the faults with the time of their occurrence. This unit is responsible for diagnosing any issues or faults that occur in the engine and keeps a record of them. It plays a crucial role in monitoring the engine's performance and identifying any potential problems that may arise. The EDU is specifically designed for diagnostic purposes, making it the correct answer in this case.Rate this question:
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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 readingsExplanation
An understanding of the operating principles of engine instruments will help determine the meanings of the instrument readings. By knowing how the instruments work, one can interpret the readings accurately and make informed decisions about the engine. This knowledge is crucial in assessing whether the engine should be removed from the aircraft or sent to the test cell for further examination. It also aids in identifying any maintenance tools that may be required to address any issues indicated by the instrument readings.Rate this question:
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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 indicatorExplanation
Most engine monitoring gauges and instruments require a transmitter and indicator. The transmitter is responsible for converting the physical parameters (such as temperature, pressure, or speed) into electrical signals, which are then transmitted to the indicator. The indicator, on the other hand, receives these electrical signals and displays them in a readable format for the operator. This setup allows for accurate and real-time monitoring of the engine's performance.Rate this question:
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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 inletExplanation
The temperature of the jet engine combustion inlet is not measured.Rate this question:
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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 resistorExplanation
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 regulate and control the flow of current. It plays a role in converting the temperature readings from the thermocouples into a measurable and readable value on the indicator. Without the resistor, the system would not be able to accurately measure and display the exhaust gas temperature.Rate this question:
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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 indicatorExplanation
The engine fuel-flow indicating system of most jet powered aircraft includes a transmitter and a fuel-flow indicator. The transmitter is responsible for measuring the flow of fuel and transmitting this information to the fuel-flow indicator, which displays the fuel flow rate to the pilot. This system is crucial for monitoring and managing the fuel consumption of the aircraft during flight.Rate this question:
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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 transmitterExplanation
A fuel-flow transmitter is a component of a jet engine's fuel system that operates using the water wheel concept. This means that it measures and transmits the rate at which fuel is flowing through the system. It is responsible for providing accurate information about the fuel flow to the engine control system, allowing for precise control of fuel consumption. This information is crucial for maintaining optimal engine performance and efficiency.Rate this question:
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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 hourExplanation
The fuel-flow indicator is used to measure the rate at which fuel is flowing in an aircraft. This rate is typically measured in pounds per hour, as it provides a more accurate representation of the fuel consumption over time. By measuring the fuel flow in pounds per hour, pilots can better monitor their fuel usage and make informed decisions regarding fuel management during a flight.Rate this question:
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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 indicatorExplanation
The oil pressure transmitter and indicator are two units that work together to indicate the correct operation of the oil system. The transmitter measures the oil pressure and sends the information to the indicator, which displays the pressure reading. This allows the operator to monitor the oil pressure and ensure that it is within the desired range for proper functioning of the system. The relief valve and synchronous unit are not directly related to indicating the oil system's operation, making them incorrect options.Rate this question:
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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. TransmitterExplanation
The oil pressure indicator receives an electrical signal from the transmitter. The transmitter is responsible for converting the physical pressure of the oil 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.Rate this question:
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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. IndicatorExplanation
The tachometer indicating system consists of two primary units: the tachometer generator and the tachometer indicator. The tachometer generator is responsible for converting the rotational speed of the engine into an electrical signal. This signal is then sent to the tachometer indicator, which displays the speed in revolutions per minute (RPM) on a gauge or dial. Therefore, the correct answer is "indicator" as it is one of the primary units of the tachometer indicating system.Rate this question:
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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 sectionExplanation
The N2 tachometer generator is typically driven from the tachometer drive located on the engine accessory section. This section of the engine houses various accessories such as the generator, hydraulic pump, and fuel pump. The tachometer drive on the engine accessory section connects to the N2 tachometer generator, which measures the rotational speed of the engine's N2 compressor. This information is crucial for monitoring and controlling the engine's performance.Rate this question:
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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 instrumentExplanation
The tachometer indicator is an electric-magnetic-drag-type instrument. This means that it uses both electric and magnetic forces to operate. The instrument relies on the drag force produced by an electrically induced magnetic field to measure and display the rotational speed of an engine or motor. This type of tachometer is commonly used in automotive and industrial applications to monitor and control the speed of rotating machinery.Rate this question:
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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 powerExplanation
The exhaust nozzle position indicating system found on engines with afterburners is important because it helps the pilot determine engine power. By providing information about the position of the exhaust nozzle, the system allows the pilot to monitor and adjust the engine's power output. This is crucial for maintaining optimal performance and efficiency during flight.Rate this question:
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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. TransducerExplanation
A transducer is a device that converts one form of energy into another. In the context of engines with afterburners, the position of the exhaust nozzle needs to be converted into an electrical signal for monitoring and control purposes. A transducer can effectively perform this task by converting the physical position of the nozzle into an electrical signal that can be easily measured and utilized by other systems. Therefore, a transducer is the most suitable option among the given choices to convert the position of the exhaust nozzle into an electrical signal.Rate this question:
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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 contactsExplanation
This overheat detector unit used on aircraft engines consists of a hollow stainless-steel tube that covers two silver contacts. These contacts are likely designed to detect temperature changes and serve as a safety mechanism. When the temperature rises above a certain threshold, the contacts may come into contact with each other, completing an electrical circuit and triggering an alarm or activating a shutdown procedure to prevent engine damage or fire.Rate this question:
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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, and it provides a direct indication of the engine's performance. By monitoring the EPR, pilots and engineers can assess the engine's thrust output and make adjustments as necessary. EPR is a crucial parameter in engine performance monitoring and maintenance.Rate this question:
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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 pressureExplanation
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 used to determine 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.Rate this question:
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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 tubingExplanation
This answer suggests that the inlet pressure (Pt2) is transmitted from its sensing point through tubing. This means that the pressure is transferred using a system of tubes or pipes, rather than being transmitted electrically, mechanically, or hydraulically. Tubing is a common method for transmitting pressure as it allows for a controlled flow of fluid or gas without the need for complex electrical or mechanical systems.Rate this question:
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- 24.
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 inputsExplanation
The test cell exhaust gas temperature (EGT) selector allows the selection of either individual thermocouple inputs or the average of these inputs. This means that the EGT parameter can be measured separately for each thermocouple or an average value can be obtained from all the thermocouples. This provides flexibility in monitoring and analyzing the exhaust gas temperature in the test cell.Rate this question:
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- 25.
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 RPMExplanation
When properly adjusted, the accuracy of the text cell N1 and N2 speed indicator will be within 2 RPM. This means that the speed indicator may have a maximum deviation of 2 RPM from the actual speed. It is important to adjust the indicator correctly to ensure accurate readings and avoid any potential errors in monitoring the speed.Rate this question:
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- 26.
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 is because the test cell 1C temperature indicator displays temperatures in degrees Fahrenheit, and the given range of -50 to +1,600 encompasses a wide range of temperatures that the indicator can measure.Rate this question:
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- 27.
What type of vibration causes unneccessary engine removals and unwarranted repairs?
- A.
Forced
- B.
Transient
- C.
Unbalanced
- D.
Externally excited
Correct Answer
D. Externally excitedExplanation
Externally excited vibrations refer to vibrations that are caused by external factors such as misalignment, loose components, or faulty machinery nearby. These vibrations can lead to unnecessary engine removals and unwarranted repairs because they are not inherent to the engine itself but are caused by external factors. Identifying and addressing the external excitation source is crucial in preventing these vibrations and avoiding unnecessary maintenance.Rate this question:
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- 28.
What kind of engine vibration does not persist, but comes and goes?
- A.
Forced
- B.
Transient
- C.
Resonance
- D.
Externally excited
Correct Answer
B. TransientExplanation
Transient engine vibration refers to vibrations that occur intermittently, appearing and disappearing over time. Unlike other types of vibrations that persist continuously, transient vibrations are temporary and may occur due to various factors such as changes in engine load or speed. These vibrations can be caused by sudden disturbances or fluctuations in the engine system, but they do not persist as a constant vibration.Rate this question:
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- 29.
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 systemExplanation
The forces acting to create vibration in a jet engine present a highly complex pattern. This complexity arises because the main rotor functions as a flexible rotor system. Unlike a rigid rotor system, a flexible rotor system can deform under the influence of external forces, leading to vibration. This flexibility allows the rotor to absorb some of the vibrations, reducing the overall impact on the engine. Therefore, the main rotor in a jet engine functions as a flexible rotor system to manage and mitigate vibration.Rate this question:
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- 30.
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 problemsExplanation
It is necessary to measure all parameters to identify a vibration source because displacement alone may not provide enough information to determine the cause of the vibration. Displacement refers to the distance an object moves from its equilibrium position, and it can be the same in two different problems even if the underlying causes of the vibrations are different. By measuring all parameters such as frequency, amplitude, and phase, it becomes possible to analyze the complete vibration profile and accurately identify the source of the vibration.Rate this question:
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- 31.
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 accelerometerExplanation
The correct answer is velocity and piezoelectric accelerometer. Velocity accelerometers measure the rate at which an object is changing its position over time, giving information about the speed and direction of the vibration. Piezoelectric accelerometers use the principle of piezoelectricity to convert mechanical vibrations into electrical signals, allowing for the measurement of acceleration. These two types of transducers are commonly used in vibration measurement to provide accurate and reliable data.Rate this question:
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- 32.
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 accelerometerExplanation
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. Therefore, when the accelerometer experiences vibrations, the crystals within it generate an electric charge proportional to the applied force, allowing for the measurement of vibration levels. This type of transducer is commonly used in various industries to monitor and analyze vibration in machinery and structures.Rate this question:
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- 33.
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 filterExplanation
The filter selector switch on the vibration analyzer allows the user to select the necessary filter. This is important because different filters are used to analyze different frequencies of vibration. By selecting the appropriate filter, the user can focus on specific frequency ranges and eliminate unwanted noise or interference, thus obtaining accurate vibration measurements and analysis.Rate this question:
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- 34.
What is used to support the fan and low pressure turbine?
- A.
Blades
- B.
Bearings
- C.
Brackets
- D.
Bushings
Correct Answer
B. BearingsExplanation
Bearings are used to support the fan and low pressure turbine. Bearings are mechanical components that reduce friction between moving parts, allowing them to rotate smoothly. In this context, bearings are used to support the rotating blades of the fan and low pressure turbine, ensuring their stability and proper functioning. Without bearings, the blades would experience excessive friction, leading to increased wear and tear, reduced efficiency, and potential damage to the entire system.Rate this question:
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- 35.
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 balanceExplanation
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 ensure that it is properly aligned and balanced, which helps to prevent any vibrations or uneven forces during operation. By achieving the correct balance, the fan and low-pressure turbine can work together efficiently and smoothly, reducing the risk of any performance issues or damage to the engine.Rate this question:
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- 36.
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 sealExplanation
The correct answer is "compressor airflow through the carbon seal". This is because the carbon seal tester is designed to simulate the effects of the airflow from the compressor passing through the carbon seal. The purpose of the tester is to evaluate the performance and integrity of the carbon seal under these conditions. By subjecting the carbon seal to the compressor airflow, any potential issues or weaknesses can be identified and addressed before the seal is used in an actual turbine gas flow system.Rate this question:
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- 37.
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 engineExplanation
The engine remote trimmer allows you to adjust the fuel control without being under the engine. This means that you can make adjustments to the fuel control system from a remote location, without having to physically be near the engine. This can be convenient and time-saving, as it eliminates the need to access the engine directly in order to make fuel control adjustments.Rate this question:
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- 38.
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 setExplanation
The supervisory control system (SCS) test set becomes an engine electronic control (EEC) when connected to the engine. This test set is specifically designed to simulate and control the engine's supervisory functions, including monitoring and controlling various engine parameters such as fuel flow, temperature, and pressure. By connecting the SCS test set to the engine, it effectively takes over the role of the EEC, allowing technicians to test and troubleshoot the engine's electronic control system.Rate this question:
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- 39.
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) testerExplanation
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 test and diagnose the engine start system, which includes the jet fuel starter. By using the ESS tester, technicians can identify and resolve any issues with the JFS, ensuring the proper functioning of the engine start system on the aircraft.Rate this question:
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- 40.
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 91-100Explanation
AFOSH STD 91-100 provides written instructions for safe flight line vehicle operations. This document is a standard that outlines the safety requirements and procedures for operating vehicles on the flight line. It is important for individuals working in this environment to be familiar with these instructions to ensure the safety of themselves and others. AFI 36-2903 is a regulation that pertains to dress and appearance in the Air Force, and the flight line job guide (JG) and intermediate maintenance TO are not specifically related to safe flight line vehicle operations.Rate this question:
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- 41.
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 electronicExplanation
Trim refers to the adjustment of engine systems to achieve optimal performance within the limits specified in the technical order (TO). There are two methods commonly used to trim an engine: manual and electronic. The manual method involves physically adjusting certain components or settings in the engine, while the electronic method utilizes electronic controls and sensors to make adjustments automatically. Both methods are employed to ensure that the engine operates at its best performance levels while adhering to the specified limits.Rate this question:
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- 42.
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 systemExplanation
The correct answer is the "output side of the main oil pump and the vent system." This is because the pressure gauges are used to measure the pressure after the oil has been pumped by the main oil pump. Additionally, the vent system is connected to ensure any excess pressure is released properly. Connecting the gauges at this location allows for accurate monitoring of the oil system pressure.Rate this question:
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- 43.
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 is responsible for converting the energy from the exhaust gases into mechanical energy to drive the compressor and other components. The temperature measurements that are typically taken in the turbine section include the fan turbine inlet temperature (FTIT), turbine inlet temperature (TIT), and exhaust gas temperature (EGT). These measurements help monitor the performance and efficiency of the turbine section and ensure that it is operating within safe limits. However, the intake gas temperature (IGT) is not typically measured in this section.Rate this question:
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- 44.
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 motoringExplanation
Dry motoring is the correct answer because it is an F-16 operational check that allows the jet fuel start (JFS) to be started without advancing the throttle to idle or supplying fuel to the aircraft engine. Dry motoring is a procedure where the JFS is started and run for a short period of time to ensure its proper functioning before starting the actual engine. It does not involve the use of fuel or the need to advance the throttle to idle position.Rate this question:
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- 45.
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. MANUALExplanation
Prior to starting the engine, when performing an anti-ice valve operational check on an F-16C/D, the correct position for the anti-ice engine switch is "MANUAL". This means that the pilot needs to manually control the anti-ice system during the check. The other options, such as "ON", "OFF", and "START", are not suitable for this specific operation.Rate this question:
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- 46.
How many primary air silencers are there on aircraft noise suppressors to help reduce turbine whine?
- A.
Two
- B.
Four
- C.
Six
- D.
Eight
Correct Answer
A. TwoExplanation
There are two primary air silencers on aircraft noise suppressors to help reduce turbine whine.Rate this question:
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- 47.
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 fuselageExplanation
The primary silencers on an aircraft noise suppressor are positioned against the aircraft fuselage. This placement allows them to effectively reduce noise by absorbing and dissipating sound waves before they reach the surrounding environment. By positioning the silencers against the fuselage, they can efficiently capture and minimize the noise generated by the aircraft engines, contributing to a quieter flying experience for passengers and reducing noise pollution on the ground.Rate this question:
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- 48.
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. 5Explanation
The correct answer is 5. This suggests 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 implemented to reduce the overall noise generated by the aircraft during operation. By limiting the afterburner operation, the noise levels can be controlled and minimized, ensuring compliance with noise regulations and reducing the impact on surrounding areas.Rate this question:
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- 49.
The hush house exhaust deflector is constructed of
- A.
Flexible soft metal filled with noise reduction material
- B.
Cylinder type tubing filled with noise reduction material
- C.
Panels and air cooling ports filled withnoise reduction material
- D.
Small panel modules filled withnoise reduction material
Correct Answer
D. Small panel modules filled withnoise reduction materialExplanation
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 multiple small panels that are filled with a material designed to reduce noise. This construction allows for effective noise reduction while also providing flexibility and ease of installation.Rate this question:
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- 50.
Before moving an aircraft into the hush house, you must inspect the aircraft
- A.
Red streamers
- B.
And its forms
- C.
Flight station
- D.
Forms
Correct Answer
B. And its formsExplanation
Before moving an aircraft into the hush house, it is necessary to inspect the aircraft and its forms. This means that not only should the physical condition of the aircraft 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 all necessary paperwork is in order before it is moved into the hush house.Rate this question:
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Mar 17, 2023Quiz Edited by
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Jul 21, 2009Quiz Created by
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