2A6X1 Self Test (Mfe)

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  • 1/63 Questions

    What are the results of an improved TO recommendation?

    • Corrects an error
    • Inserts an omitted fact
    • Standardizes improved procedures for all personel air force wide
    • All of the above
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2A6X1 Self Test (Mfe) - Quiz
About This Quiz

The 2A6X1 self-test (MFE) assesses knowledge in aerospace maintenance, focusing on TO improvement forms, ET&D program goals, and data utilization. It's essential for personnel aiming to enhance engine health monitoring and performance diagnostics.

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  • 2. 

    What is the purpose of the oil cooler?

    • Warm the air

    • Creat vacuum effect for augmentation

    • Cool the oil

    • None of the above

    Correct Answer
    A. Cool the oil
    Explanation
    The purpose of the oil cooler is to cool the oil. This is important because oil can become hot and lose its effectiveness in lubricating and protecting the engine parts. By cooling the oil, the oil cooler helps to maintain its optimal viscosity and prevent overheating, ensuring that the engine operates smoothly and efficiently.

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  • 3. 

    What causes most nicks and scratches on engine plumbing?

    • Careless handling of tools during maintenance

    • Contamination of fluids

    • Wear metals

    • Engine plumbing not sealed properly

    Correct Answer
    A. Careless handling of tools during maintenance
    Explanation
    Careless handling of tools during maintenance can cause most nicks and scratches on engine plumbing. When tools are not handled properly, they can accidentally come into contact with the plumbing, leading to scratches or nicks. This can happen when tools are dropped, mishandled, or used with excessive force. Such damage can compromise the integrity of the plumbing system and may result in leaks or other issues. Therefore, it is important to exercise caution and proper tool handling techniques during maintenance to prevent these types of damages.

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  • 4. 

    What form is used to recomend improvements to TO's

    • Dd form 1575

    • Dd form 1574

    • AFTO form 22

    • AFTO form 20

    Correct Answer
    A. AFTO form 22
    Explanation
    AFTO form 22 is the correct answer because it is the form used to recommend improvements to Technical Orders (TO's). This form allows individuals to provide feedback and suggestions for improving the TO's, ensuring that they are up to date and effective. It is important to use the correct form for this purpose to ensure that the recommendations are properly documented and considered for implementation.

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  • 5. 

    How should dust covers be installed on open lines?

    • Over rather than in

    • In rather than over

    • Tape around

    • None of the above

    Correct Answer
    A. Over rather than in
    Explanation
    Dust covers should be installed over open lines rather than in them. This means that the covers should be placed on top of the lines, rather than being inserted inside the lines. Installing the covers over the lines helps to provide a protective barrier against dust and other contaminants, preventing them from entering the lines and potentially causing damage or blockages.

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  • 6. 

    On the t56 engine fuel nozzles, what type inspection is performed in addiion to the visual inspection?

    • Spray pattern field test

    • Mirror finish test

    • Nozzle clog test

    • None of the above

    Correct Answer
    A. Spray pattern field test
    Explanation
    The correct answer is Spray pattern field test. In addition to visual inspection, a spray pattern field test is performed on the t56 engine fuel nozzles. This test helps to ensure that the fuel is being sprayed evenly and in the correct pattern. It is important to verify the spray pattern to ensure proper combustion and fuel efficiency.

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  • 7. 

    What are the functions of performed by the air system?

    • Normal air flow for combustion surge control and load control

    • Excessive airflow for cooling

    • Both A and B

    • None of the above

    Correct Answer
    A. Both A and B
    Explanation
    The correct answer is "Both A and B." This means that the functions performed by the air system include normal air flow for combustion surge control and load control, as well as excessive airflow for cooling.

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  • 8. 

    Why is oil routed to the fuel heater and strainer?

    • To strain the oil

    • To strain the fuel

    • To heat the oil and cool the fuel

    • To heat the fuel and cool the oil

    Correct Answer
    A. To heat the fuel and cool the oil
    Explanation
    The oil is routed to the fuel heater and strainer in order to heat the fuel and cool the oil. This process helps to ensure that the fuel is at the optimal temperature for combustion, while also preventing the oil from overheating. By routing the oil through the fuel heater, it can be warmed up before it enters the engine, improving its efficiency. At the same time, the fuel is cooled down to prevent any potential issues that may arise from overheating.

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  • 9. 

    If the special rotator is unavailable how would you rotate the F100 engine rear compressor

    • Bump by hand

    • Turn PTO on gear box with a wrench

    • Motor the engine

    • None of the above

    Correct Answer
    A. Turn PTO on gear box with a wrench
    Explanation
    If the special rotator is unavailable, the F100 engine rear compressor can be rotated by turning the PTO (Power Take-Off) on the gear box with a wrench. This method allows manual rotation of the compressor, ensuring that it functions properly. Bumping by hand or motoring the engine are not suitable options for rotating the compressor in the absence of a special rotator.

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  • 10. 

    Which best describes the construction of a fixed test cell?

    • The test cell is a brick block building with steel reinforcements

    • The control room usually has a double-safety glass arrangement for operator to view engine while its running

    • There is usually two seperate doors between control room and test bay

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    A fixed test cell is constructed as a brick block building with steel reinforcements. The control room is equipped with a double-safety glass arrangement that allows the operator to view the engine while it is running. Additionally, there are usually two separate doors between the control room and the test bay. Therefore, all of the given options accurately describe the construction of a fixed test cell.

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  • 11. 

    What is used to identify hose and tubing system after installation?

    • Numbering

    • Name of substance flowing through

    • Name of componet attatched to hose

    • Color coded bands

    Correct Answer
    A. Color coded bands
    Explanation
    Color coded bands are used to identify hose and tubing systems after installation. These bands are typically placed on the hoses or tubing and are assigned specific colors that correspond to different types of substances or components. This helps in easily identifying and distinguishing between different hoses and tubing systems, ensuring proper usage and maintenance.

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  • 12. 

    What is the ET&D program?

    • An integration of hardware, software, maintenance, and diagnostic process to qualify and monitor engine health

    • To diagnose monitor and qaulify engine health

    • To prevent unnecessary part and engine changes

    • None of the above

    Correct Answer
    A. An integration of hardware, software, maintenance, and diagnostic process to qualify and monitor engine health
    Explanation
    The ET&D program is an integration of hardware, software, maintenance, and diagnostic processes that are used to qualify and monitor the health of an engine. This program aims to diagnose, monitor, and qualify the engine's health, ensuring that any potential issues are detected and addressed promptly. By implementing this program, unnecessary part and engine changes can be prevented, saving time and resources.

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  • 13. 

    How do flightline personnel use ET&D data?

    • Increase average ETOW by eliminating time based removals

    • Reduce life costs and improve reliability by improved measurement of life used on critical components

    • Module matching

    • By collecting raw engine data and transferring it to the base maintenance shop for analysis

    Correct Answer
    A. By collecting raw engine data and transferring it to the base maintenance shop for analysis
    Explanation
    Flightline personnel use ET&D (Engine Trend and Diagnostics) data by collecting raw engine data and transferring it to the base maintenance shop for analysis. This allows for the identification of any potential issues or abnormalities in the engine's performance, which can then be addressed and resolved by the maintenance team. By analyzing the data, flightline personnel can ensure that the engines are operating optimally and make any necessary adjustments or repairs to improve reliability and reduce life costs. Module matching, increasing average ETOW, and eliminating time-based removals are not mentioned in relation to the use of ET&D data by flightline personnel.

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  • 14. 

    What is the allowable limit for a dent in a straight line?

    • Less than 20% of diameter and not on the heel of a short bend radius

    • Less than 25% of diameter and not on the heel of a short bend radius

    • Less than 30% of diameter and not on the heel of a short bend radius

    • Less than 50% of diameter and not on the heel of a short bend radius

    Correct Answer
    A. Less than 20% of diameter and not on the heel of a short bend radius
    Explanation
    The allowable limit for a dent in a straight line is less than 20% of the diameter and not on the heel of a short bend radius. This means that any dent in a straight line should be smaller than 20% of the pipe's diameter and should not be located on the heel of a short bend radius. This is important because dents can weaken the structural integrity of the pipe and may lead to failure or leakage if they exceed the allowable limit.

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  • 15. 

    What is the purpose of external flanges on the engine?

    • Attach brackets

    • Attach external accessories

    • Attach support equipment

    • All the above

    Correct Answer
    A. All the above
    Explanation
    The purpose of external flanges on the engine is to serve multiple functions. They are used to attach brackets, which provide support and stability to various components of the engine. They also serve as attachment points for external accessories, such as air filters or cooling systems. Additionally, external flanges can be used to attach support equipment, such as lifting devices or diagnostic tools. Therefore, the correct answer is "All the above" as external flanges serve all of these purposes.

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  • 16. 

    How do depot and product center engineers and technicians utilize the ET&D program?

    • To determine if maintenance must be performed before the next flight and/or before next engine change

    • To develop engine trend data and provide support to field users by diagnosing engine performance problems

    • Collecting raw engine data and transferring it to the base engine maintenance shop foe analysis

    • None of the above

    Correct Answer
    A. To develop engine trend data and provide support to field users by diagnosing engine performance problems
    Explanation
    Depot and product center engineers and technicians utilize the ET&D program to develop engine trend data and provide support to field users by diagnosing engine performance problems. This means that they use the program to collect and analyze raw engine data, identify any issues or trends in engine performance, and offer assistance to users in resolving these problems. This helps in ensuring the optimal functioning of the engines and identifying any maintenance or repair requirements before the next flight or engine change.

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  • 17. 

    What is the purpose of an air duct through the inside diameter of the compressor rotor?

    • Forms a flow path for warming air

    • Allows excess air a path to escape

    • To pressurize the compressor

    • Forms a flow path for pressurizing and cooling air

    Correct Answer
    A. Forms a flow path for pressurizing and cooling air
    Explanation
    The purpose of an air duct through the inside diameter of the compressor rotor is to form a flow path for pressurizing and cooling air. This allows the air to be compressed and cooled as it passes through the rotor, which is essential for the efficient operation of the compressor. The air duct ensures that the air is properly pressurized and cooled before it moves on to the next stage of the compression process.

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  • 18. 

    The load control system consists of what component(s)?

    • Modulating valve and pnuematic thermostat

    • Shutoff valve load control valve and control pressure regulator

    • Pnuematic thermostat and shutoff valve

    • Modulating and shutoff valve, load control valve, control pressure regulator, and pnuematic thermostat

    Correct Answer
    A. Modulating and shutoff valve, load control valve, control pressure regulator, and pnuematic thermostat
    Explanation
    The load control system consists of multiple components including modulating valve, shutoff valve, load control valve, control pressure regulator, and pneumatic thermostat. These components work together to regulate and control the flow of load in a system. The modulating valve adjusts the flow rate based on the input signal, while the shutoff valve controls the opening and closing of the flow. The load control valve helps in maintaining the desired load level, and the control pressure regulator maintains the required pressure. The pneumatic thermostat senses the temperature and provides input for controlling the load.

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  • 19. 

    What two types of gear pumps are used in the t56 oil system?

    • Filtered and non-filtered

    • Gravity and centrifugal

    • Dual spool and single spool

    • Pressure and scavenge

    Correct Answer
    A. Pressure and scavenge
    Explanation
    The T56 oil system uses pressure and scavenge gear pumps. Pressure pumps are responsible for supplying oil under pressure to various components of the system, while scavenge pumps are used to remove oil from different parts of the system and return it to the oil tank. These two types of gear pumps work together to ensure proper lubrication and cooling of the engine components in the T56 oil system.

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  • 20. 

    What are the two advantages of the modular engine concept?

    • Eliminates the need to return engine to depot for overhaul, engine changes can be done faster

    • Makes the removal and replacements of parts faster

    • Engines can be serviced faster, and eliminates the need to return the entire engine to depot for overhaul

    • None of the above

    Correct Answer
    A. Engines can be serviced faster, and eliminates the need to return the entire engine to depot for overhaul
    Explanation
    The modular engine concept offers two advantages. Firstly, it allows engines to be serviced faster as only the specific parts that require maintenance or replacement can be addressed, rather than the entire engine. Secondly, it eliminates the need to return the entire engine to the depot for overhaul, resulting in quicker turnaround times and reduced downtime for the engine.

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  • 21. 

    What is used in the air inlet duct for silencing?

    • 18 inch fiberglass acoustialc mats

    • Foam filled mats

    • Water filled mats

    • None of the above

    Correct Answer
    A. 18 inch fiberglass acoustialc mats
    Explanation
    18 inch fiberglass acoustialc mats are used in the air inlet duct for silencing. These mats are effective in reducing noise by absorbing sound waves and preventing them from bouncing back into the environment. The thickness of 18 inches allows for better sound absorption and insulation. Foam filled mats and water filled mats are not commonly used for silencing in air inlet ducts.

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  • 22. 

    How are HPT  nozzles cooled?

    • 5th and 10th stage bleed air

    • By CDP air that bypasses the the combustion inner and outer liner

    • An air duct through the center of compressor

    • None of the above

    Correct Answer
    A. By CDP air that bypasses the the combustion inner and outer liner
    Explanation
    HPT (High Pressure Turbine) nozzles are cooled by CDP (Compressor Discharge Pressure) air that bypasses the combustion inner and outer liner. This means that the air used for cooling is taken from the compressor discharge and directed towards the HPT nozzles, bypassing the combustion chamber. This method helps to prevent overheating of the nozzles and ensures their proper functioning.

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  • 23. 

    On the t56 engine what happens to the fuel when it's bypassed the TD valve?

    • Nothing

    • Bypassed to the fuel nozzles

    • Bypassed back to the fuel pump

    • None of the above

    Correct Answer
    A. Bypassed back to the fuel pump
    Explanation
    When the fuel is bypassed the TD (Turbine Discharge) valve on the T56 engine, it is redirected back to the fuel pump. This means that the fuel does not reach the fuel nozzles and instead returns to the pump.

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  • 24. 

    What helps ensure long life for the combustion chamber?

    • Ceramic coating of the inner lining of the combustion chamber

    • The combustion chamber is film cooled by CDP air and has special coatings applied to the metal

    • Thickness or combustion chamber walls

    • None of the above

    Correct Answer
    A. The combustion chamber is film cooled by CDP air and has special coatings applied to the metal
    Explanation
    The combustion chamber is designed to have a long life by implementing two measures: film cooling with CDP air and applying special coatings to the metal. Film cooling involves directing a cool air flow over the surface of the combustion chamber to protect it from the high temperatures generated during combustion. Special coatings are applied to the metal surfaces to provide additional protection against heat, corrosion, and wear. These measures help ensure the longevity of the combustion chamber by reducing the effects of high temperatures and other damaging factors.

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  • 25. 

    Which part of the core engine major module is subjected to the most stress?

    • The HPT rotor assembly

    • The LPT rotor assembly

    • The compressor

    • The front stator case

    Correct Answer
    A. The HPT rotor assembly
    Explanation
    The HPT (High Pressure Turbine) rotor assembly is subjected to the most stress in the core engine major module. This is because the HPT rotor assembly operates at high temperatures and pressures, and it is responsible for extracting energy from the combustion gases to drive the high-pressure compressor and the fan. The HPT rotor assembly experiences high rotational speeds and is exposed to extreme heat and mechanical forces, making it the component that is most likely to be subjected to the highest levels of stress.

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  • 26. 

    What is the primary goal of the ET&D program?

    • Predict, detect, and conduct pre-emptive maintenace of adver trends

    • To prevent/limit damage to turbine engines by early detection of performance degradation/ failures

    • Forecast time and material requirements days or weeks in advance to minimize ENMCS rates and maintenance man hours

    • Reduce shop flow days and increase serviceable spare engine levels

    Correct Answer
    A. To prevent/limit damage to turbine engines by early detection of performance degradation/ failures
    Explanation
    The primary goal of the ET&D program is to prevent or limit damage to turbine engines by early detection of performance degradation or failures. This means that the program aims to identify any issues or potential problems with the engines as early as possible in order to take appropriate action and prevent further damage or failures. By detecting these issues early on, the program can ensure that the engines are operating at their optimal level and minimize the risk of any significant damage or failures occurring.

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  • 27. 

    What protects the leading edge of the propeller blades?

    • Nickel guard

    • Aluminum guard

    • Copper guard

    • None of the above

    Correct Answer
    A. Nickel guard
    Explanation
    The leading edge of the propeller blades is protected by a nickel guard. Nickel is known for its corrosion resistance and durability, making it an ideal material for guarding the propeller blades against damage and wear. It helps to prevent any potential damage that could occur during flight, such as erosion or impact from foreign objects.

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  • 28. 

    What design featureof theexhaust stack controls exhaust low-frequency  sound in a fixed test cell?

    • Diagonal baffles

    • Verticle baffles

    • Horizontal baffles

    • None of the above

    Correct Answer
    A. Verticle baffles
    Explanation
    Vertical baffles are a design feature of the exhaust stack that controls exhaust low-frequency sound in a fixed test cell. These baffles are positioned vertically within the exhaust stack and are designed to disrupt and redirect the flow of exhaust gases. By doing so, they help to reduce the intensity and propagation of low-frequency sound waves, effectively controlling the noise generated by the exhaust system in the test cell.

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  • 29. 

    Where would you stand in reference to the engine to determine which direction the compressor is rotating?

    • Front facing rear towards the exhaust

    • Rear facing the intake

    • Right facing the exhaust

    • Left facing the intake

    Correct Answer
    A. Rear facing the intake
    Explanation
    To determine the direction of rotation of the compressor, you would stand at the rear of the engine, facing the intake. This is because the compressor is located at the front of the engine, and the intake is where air enters the engine. By standing at the rear and facing the intake, you can observe the direction in which the compressor blades are rotating.

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  • 30. 

    The fan thrust reverser door upright and left sensors send a signal to which channel of EEC?

    • Channel A

    • Channel B

    • Channel C

    • Channel D

    Correct Answer
    A. Channel A
    Explanation
    The fan thrust reverser door upright and left sensors send a signal to Channel A of the EEC.

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  • 31. 

    How many linear hydraulic actuators are used to deploy and stow the fan thrust reverser?

    • 2

    • 4

    • 6

    • 8

    Correct Answer
    A. 4
    Explanation
    The correct answer is 4. This suggests that there are four linear hydraulic actuators used to deploy and stow the fan thrust reverser.

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  • 32. 

    (core engine major module)Bleed air for use by the engine and aircraft is taken form which stages of the compressor assembly

    • 5th stage

    • 9th stage

    • 5th and 9th stages

    • 12th stage

    Correct Answer
    A. 5th and 9th stages
    Explanation
    The bleed air for use by the engine and aircraft is taken from the 5th and 9th stages of the compressor assembly. These stages are specifically designed to provide the necessary amount of air for various purposes such as cabin pressurization, anti-icing, and air conditioning. By taking air from these stages, the engine and aircraft can efficiently utilize the compressed air for different systems and functions, ensuring optimal performance and safety during flight.

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  • 33. 

    How many stages of compression does the f100 have?

    • 13

    • 12

    • 15

    • 11

    Correct Answer
    A. 13
    Explanation
    The F100 has 13 stages of compression.

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  • 34. 

    What advantage does steel tubing have over aluminum tubing?

    • It can withstand rough handling and high pressure

    • It is less vulnerable to corrosion

    • Steel is easier to to bend with out kinks

    • Steel has a higher tolerance of heat

    Correct Answer
    A. It can withstand rough handling and high pressure
    Explanation
    Steel tubing has an advantage over aluminum tubing because it can withstand rough handling and high pressure. This means that steel tubing is more durable and can be used in applications where it may be subjected to rough treatment or exposed to high levels of pressure. Aluminum tubing, on the other hand, may be more prone to damage in such conditions.

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  • 35. 

    What design feature allows for easy visual inspection of the F110 engine rear compressor rotor blades?

    • Vertical split line of the rear compressor case

    • Horizontal splitl ine of the rear compressor case

    • Horizontal split line of the front compressor case

    • None of the above

    Correct Answer
    A. Horizontal splitl ine of the rear compressor case
    Explanation
    The horizontal split line of the rear compressor case allows for easy visual inspection of the F110 engine rear compressor rotor blades. This design feature enables technicians to access and inspect the blades without having to disassemble the entire engine. By simply opening the rear compressor case along the horizontal split line, they can visually inspect the rotor blades for any damage, wear, or other issues, ensuring the engine's proper functioning and maintenance.

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  • 36. 

    What size fitting should be used for a piece of tubing that is 5/8 inch?

    • Number 10

    • Number 11

    • Number 12

    • Number 13

    Correct Answer
    A. Number 10
    Explanation
    The correct answer is Number 10 because the question is asking for the size fitting that should be used for a piece of tubing that is 5/8 inch. Number 10 is the closest option to 5/8 inch, indicating that it is the appropriate size fitting for the tubing.

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  • 37. 

    The thrust reverser control valve controls hydraulic power for actuating what component(s)?

    • The fan reverser

    • The core reverser

    • The fan and core reversers

    • The fan major module

    Correct Answer
    A. The fan and core reversers
    Explanation
    The thrust reverser control valve controls hydraulic power for actuating both the fan reverser and the core reverser.

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  • 38. 

    Why are there two seperate doors btween the control room and the test bay?

    • To prevent debris from entering the control room

    • To prevent unwanted noise from getting in the control room

    • To prevent exhaust blast and fumes from entering the control room

    • None of the above

    Correct Answer
    A. To prevent unwanted noise from getting in the control room
    Explanation
    The reason for having two separate doors between the control room and the test bay is to prevent unwanted noise from entering the control room. This is important because the control room requires a quiet environment for accurate monitoring and communication. Having two doors helps to create a sound barrier and minimize the noise transmission from the test bay to the control room, ensuring a suitable working environment for the personnel inside the control room.

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  • 39. 

    Which t56 TD component compares actual and scheduled TIT signals?

    • TD valve

    • Coordinator

    • TD amp

    • None of the above

    Correct Answer
    A. TD amp
    Explanation
    The TD amp (Throttle Deceleration amplifier) is the correct answer because it is the component that compares the actual and scheduled TIT (Turbine Inlet Temperature) signals. The TD amp is responsible for adjusting the throttle position based on the comparison of these signals, ensuring that the turbine operates within safe temperature limits. The other options, TD valve and Coordinator, do not perform this specific function.

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  • 40. 

    Why are flexible hoses used instead or metal tubing in some applications?

    • Hoses can be easily fitted to fit an area or application where needed

    • Metal tubing is subject to corrosion where flexible hoses are not

    • Hoses are especially suitable where a great amount of flexibility is needed and where lines are subject to vibration

    • All of the above

    Correct Answer
    A. Hoses are especially suitable where a great amount of flexibility is needed and where lines are subject to vibration
    Explanation
    Flexible hoses are used instead of metal tubing in some applications because they can be easily fitted to fit an area or application where needed. Additionally, hoses are especially suitable where a great amount of flexibility is needed and where lines are subject to vibration. Metal tubing is subject to corrosion, whereas flexible hoses are not. Therefore, all of the above reasons contribute to the use of flexible hoses in certain applications.

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  • 41. 

    Which t56 engine component acts with the td valve to control fuel flow during start to prevent overtemp and compressor surge?

    • Enrichment valve

    • Fuel control

    • TD amp

    • None of the above

    Correct Answer
    A. Fuel control
    Explanation
    The fuel control component acts with the td valve to control fuel flow during start in order to prevent overtemp and compressor surge. It ensures that the correct amount of fuel is being delivered to the engine during the start-up process, preventing any potential damage or issues that could occur from an excessive fuel flow.

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  • 42. 

    The two elements of the t56 engine thermal couple assembly are connected to the switch components?

    • TIT system and TD amp

    • TIP system and TD amp

    • TIT system and TD valve

    • TIP system and TD valve

    Correct Answer
    A. TIT system and TD amp
    Explanation
    The correct answer is TIT system and TD amp. The TIT system refers to the turbine inlet temperature system, which measures the temperature of the air entering the turbine. The TD amp refers to the turbine discharge amplifier, which amplifies the signal from the TIT system. Therefore, the two elements of the t56 engine thermal couple assembly that are connected to the switch components are the TIT system and TD amp.

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  • 43. 

    Bleed air flowing through wich augmentation system component, creates a low pressure area in front of the oil cooler?

    • The injectors

    • The ejectors

    • Vacuum valve

    • All of the above

    Correct Answer
    A. The ejectors
  • 44. 

    Why are directional references on the engine?

    • To know which direction internal parts are moving

    • To establish common points of reference on the engine

    • To establish safe areas around running engines

    • All of the above

    Correct Answer
    A. To establish common points of reference on the engine
    Explanation
    Directional references on the engine are used to establish common points of reference. This helps in identifying and locating specific parts or areas on the engine. By having a standardized system of directional references, it becomes easier for technicians and engineers to communicate and work on the engine. It also aids in troubleshooting and maintenance activities, as everyone involved can refer to the same points of reference when discussing or working on the engine.

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  • 45. 

    Which stages of the turbine section drive the rear(n2) compressor?

    • 1st and 2nd

    • 5th and 6th

    • 10th and 12th

    • None of the above

    Correct Answer
    A. 1st and 2nd
    Explanation
    The correct answer is 1st and 2nd. In a turbine section, the stages are numbered from the front to the rear. The first and second stages of the turbine section are responsible for driving the rear (N2) compressor.

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  • 46. 

    Why is the t56 oil tank pressurized?

    • Maintain pressure at altitude

    • Prevent from foaming

    • Keep oil circulating

    • Keep oil from settling

    Correct Answer
    A. Prevent from foaming
    Explanation
    The t56 oil tank is pressurized to prevent foaming. When oil is agitated or subjected to high temperatures, it can create air bubbles or foam, which can negatively impact its lubricating properties. By pressurizing the oil tank, the air inside is compressed, reducing the likelihood of foaming. This ensures that the oil maintains its effectiveness in lubricating the engine components and prevents any potential damage that foaming could cause.

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  • 47. 

    At what pressure are the RGB pressure and scavenge oil system relief valves set?

    • 350psi

    • 300psi

    • 250psi

    • 200psi

    Correct Answer
    A. 250psi
    Explanation
    The RGB pressure and scavenge oil system relief valves are set at a pressure of 250psi.

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  • 48. 

    What are the two purposes of the front stator case on the f108 engine?

    • To house stator vanes and enclose the compressor rotor

    • To direct air and enclose compressor rotor

    • To enclose stator vane assembly and increase pressue

    • None of the above

    Correct Answer
    A. To house stator vanes and enclose the compressor rotor
    Explanation
    The front stator case on the f108 engine serves two purposes. Firstly, it houses the stator vanes, which are stationary blades that help to redirect the airflow and improve the efficiency of the engine. Secondly, it encloses the compressor rotor, which is responsible for compressing the incoming air before it enters the combustion chamber. By enclosing the rotor, the front stator case helps to ensure that the compressed air is properly directed and contained within the engine.

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  • 49. 

    Which stator stages are housed in the rear stator assembly?

    • 1st and 5th

    • 5th and 10th

    • 6th and 8th

    • 10th and 12th

    Correct Answer
    A. 6th and 8th
    Explanation
    The correct answer is 6th and 8th. These stages are housed in the rear stator assembly.

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Quiz Review Timeline (Updated): Mar 20, 2024 +

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  • Current Version
  • Mar 20, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 13, 2010
    Quiz Created by
    Samh5112

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