CDC 2A651 Self Test EOC Pre-test

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  • 1/201 Questions

    What should you do with your toolbox when it is not in use?

    • Accountability
    • Lock box
    • Accountability & lock box
    • None of the above
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CDC 2A651 Self Test EOC Pre-test - Quiz
About This Quiz

This CDC 2A651 SELF TEST EOC PRE-TEST assesses knowledge in aerospace maintenance, safety protocols, and equipment handling within the military. It evaluates expertise in squadron functions, safety standards, and technical skills crucial for personnel.

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  • 2. 

    What must you do if you must torque a sequence of 3 or more bolts?

    • Use maximum torque

    • Overtorque,loosen, and re tourqe

    • Use a staggered sequence

    • Torque from left to right

    Correct Answer
    A. Use a staggered sequence
    Explanation
    When torquing a sequence of 3 or more bolts, it is important to use a staggered sequence. This means that instead of torquing the bolts in a straight line from left to right or right to left, you should alternate between bolts in a diagonal pattern. This helps to distribute the torque evenly and prevent any uneven tightening or stress on the bolts. Using a staggered sequence is a common practice in order to ensure proper and balanced torquing of multiple bolts.

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  • 3. 

    What instrument is used to measure barometric pressure?

    • Weather balloon

    • Barometer

    • Potentiometer

    • Pyrometer

    Correct Answer
    A. Barometer
    Explanation
    A barometer is used to measure barometric pressure. Barometric pressure refers to the pressure exerted by the atmosphere on a given area. A barometer typically consists of a sealed glass tube filled with mercury or aneroid capsules that expand or contract with changes in air pressure. By measuring the height of the mercury column or the movement of the aneroid capsules, the barometer can provide an accurate measurement of atmospheric pressure. This measurement is important in weather forecasting and can help predict changes in weather patterns.

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  • 4. 

    001. Functions within the maintenance complexWhat does the fourth position of the AFSC 3A652 represent?

    • Jet Engine

    • Skill Level

    • Career field

    • Aircraft propulsion systems

    Correct Answer
    A. Skill Level
    Explanation
    The fourth position of the AFSC 3A652 represents the skill level. This indicates the level of proficiency and experience that an individual has in their career field. It helps to determine the responsibilities and tasks that they are qualified to perform within the maintenance complex.

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  • 5. 

    What type of fuel do todays jet engines use?

    • JP-8

    • JP-7

    • JP-5

    • JP-6

    Correct Answer
    A. JP-8
    Explanation
    Jet engines today primarily use JP-8 fuel. JP-8 is a kerosene-based fuel that is commonly used in military aircraft. It has a high energy density and a low freezing point, making it suitable for use in a wide range of operating conditions. JP-8 also has additives that enhance its performance and stability, such as corrosion inhibitors and anti-icing agents. Overall, JP-8 is the preferred fuel for modern jet engines due to its reliability, efficiency, and compatibility with various aircraft systems.

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  • 6. 

    Within how many hours must a category I DR be forwarded to the screening point

    • 8

    • 24

    • 12

    • 72

    Correct Answer
    A. 24
    Explanation
    A category I DR must be forwarded to the screening point within 24 hours. This time frame ensures that any potential security threats or issues can be promptly addressed and resolved. By forwarding the DR within 24 hours, the screening point can take appropriate actions to mitigate any risks and maintain the safety and security of the area.

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  • 7. 

    What is the most common type of fual system in jet engines

    • Pressure-atomizing

    • Fuel-blasting

    • Fuel ejector

    • Fuel tube

    Correct Answer
    A. Pressure-atomizing
    Explanation
    The most common type of fuel system in jet engines is pressure-atomizing. This system uses high pressure to atomize the fuel into tiny particles, allowing for efficient combustion in the engine. The fuel is injected into the combustion chamber at a high pressure, where it mixes with compressed air and ignites to produce thrust. This method ensures proper fuel-air mixture and combustion, resulting in optimal engine performance.

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  • 8. 

    415. Jet engine pol analysis and inspectionWhat are the microscopic metallic particles in the oil system called?

    • Wear metals

    • Friction metals

    • Precious metals

    • Transformation metals

    Correct Answer
    A. Wear metals
    Explanation
    The microscopic metallic particles in the oil system are called wear metals. These particles are generated as a result of friction and wear between the moving parts of the jet engine. They can provide valuable information about the condition of the engine and help identify any potential issues or abnormalities. By analyzing and inspecting these wear metals, maintenance and repair activities can be carried out to ensure the optimal performance and longevity of the engine.

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  • 9. 

    What directes gases onto the first-stage turbine wheel blades in a jet engine?

    • Turbine stator

    • Turbine wheel blades

    • Combustion chamber

    • Flameholder

    Correct Answer
    A. Turbine stator
    Explanation
    The turbine stator directs gases onto the first-stage turbine wheel blades in a jet engine. It is responsible for guiding the flow of gases from the combustion chamber towards the turbine blades, where the gases expand and generate power to drive the engine. The stator ensures that the gases are directed with precision onto the turbine blades, optimizing the efficiency and performance of the engine.

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  • 10. 

    Most engine monitoring guages and instruments require some type of

    • Electrical valve to the indicator

    • Metal tubing for electron flow

    • Radio frequency transmitter

    • Transmitter and indicator

    Correct Answer
    A. Transmitter and indicator
    Explanation
    Most engine monitoring gauges and instruments require a transmitter and indicator. The transmitter is responsible for converting the physical measurements, such as temperature or pressure, into electrical signals. These signals are then transmitted to the indicator, which displays the readings on a gauge or instrument panel. The transmitter and indicator work together to provide accurate and real-time information about the engine's performance.

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  • 11. 

    What is the term used to indicate that air is being mixed with the oil in the oil pump to create pockets of air?

    • Aeration

    • Induction

    • Convetion

    • Compression

    Correct Answer
    A. Aeration
    Explanation
    Aeration is the term used to indicate that air is being mixed with the oil in the oil pump to create pockets of air. This process can occur when there is excessive turbulence or agitation in the oil, causing air to become trapped and mixed with the oil. Aeration can lead to a decrease in lubrication efficiency and potential damage to the components being lubricated.

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  • 12. 

    What does the term N0.320 grit" refer to when dealing with sandpaper?

    • Type

    • Strength

    • Coarseness

    • Flexibility

    Correct Answer
    A. Coarseness
    Explanation
    The term "N0.320 grit" refers to the coarseness of sandpaper. Grit refers to the size of the abrasive particles on the sandpaper. In this case, N0.320 grit indicates that the sandpaper has a medium coarseness, with the abrasive particles being relatively fine. This grit is suitable for smoothing surfaces and removing small imperfections.

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  • 13. 

    Which inspection is conducted by maintenance personnel after an occurence of a specific or unusual condition

    • Special

    • Calender

    • Acceptance

    • Time replacement item

    Correct Answer
    A. Special
    Explanation
    After an occurrence of a specific or unusual condition, maintenance personnel conduct a special inspection. This type of inspection is carried out to assess the situation and identify any potential damage or issues caused by the specific or unusual condition. It allows maintenance personnel to thoroughly examine the equipment or system involved and determine if any repairs or replacements are necessary to ensure its proper functioning and prevent further problems. The special inspection is crucial in addressing the immediate concerns and ensuring the safety and reliability of the equipment or system.

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  • 14. 

    What type of maitenance does depot perform?

    • Engine/component overhaul

    • Isochronal inspection

    • Off equipment maintenance

    • Phase inspection

    Correct Answer
    A. Engine/component overhaul
    Explanation
    Depot maintenance performs engine/component overhaul. This type of maintenance involves disassembling, inspecting, repairing, and reassembling engines or components to ensure they are functioning properly. It is a comprehensive maintenance process that aims to extend the lifespan and performance of the equipment. Isochronal inspection, off equipment maintenance, and phase inspection are other types of maintenance activities that may be performed by depot, but the correct answer specifically refers to engine/component overhaul.

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  • 15. 

    You should record the removal and replacement of engine accessories on which one of the following AFTO forms?

    • 25

    • 44

    • 95

    • 349

    Correct Answer
    A. 95
    Explanation
    The correct answer is 95. AFTO Form 95 is used to record the removal and replacement of engine accessories. This form is specifically designed for documenting maintenance actions on aircraft engines. It provides a standardized format to track and record the details of accessory removal and replacement, ensuring proper documentation and maintenance history for the engine.

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  • 16. 

    In an engine oil tank, what is the device that seperates the air from the oil

    • Aerator

    • Deaerotor

    • Check valve

    • Bypass valve

    Correct Answer
    A. Deaerotor
    Explanation
    A deaerator is a device used in an engine oil tank to separate the air from the oil. This device is specifically designed to remove dissolved gases, such as oxygen and carbon dioxide, from the oil. By removing the air, the deaerator helps prevent oxidation and corrosion of the oil, ensuring optimal performance and longevity of the engine.

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  • 17. 

    Where does the oil pressure indicator recieve and electrical signal from?

    • Gyro

    • Transmitter

    • Hydraulic unit

    • Synchronous unit

    Correct Answer
    A. Transmitter
    Explanation
    The oil pressure indicator receives an electrical signal from a transmitter. The transmitter is responsible for converting the hydraulic pressure into an electrical signal, which is then sent to the oil pressure indicator. This allows the oil pressure indicator to accurately display the pressure of the oil in the system.

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  • 18. 

    What is the sea-level atmoshperic pressure at "standard day" conditions?

    • 13.5psi

    • 14.7psi

    • 49.94psi

    • 40.55psi

    Correct Answer
    A. 14.7psi
    Explanation
    At "standard day" conditions, the sea-level atmospheric pressure is approximately 14.7psi. This value is considered as the average atmospheric pressure at sea level under normal conditions.

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  • 19. 

    Which engine component meter fuel for combustion?

    • P&D valve

    • Fuel pump

    • Fuel control

    • Fuel nozzles

    Correct Answer
    A. Fuel control
    Explanation
    The fuel control is responsible for metering fuel for combustion in the engine. It regulates the flow of fuel into the engine based on various factors such as engine speed, load, and temperature. By accurately controlling the fuel flow, the fuel control ensures that the engine receives the correct amount of fuel for efficient and optimal combustion. This helps in maintaining engine performance, fuel efficiency, and emissions control.

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  • 20. 

    What is the recommended method of heating inner races of bearings before installation?

    • Using a portable heater

    • Placing them inside a bearing furnace

    • Soaking them in a hydraulic oil bath

    • Heating them in a hot-oil bath

    Correct Answer
    A. Heating them in a hot-oil bath
    Explanation
    Heating inner races of bearings in a hot-oil bath is the recommended method of heating before installation. This method ensures that the inner races are heated evenly and to the correct temperature, which helps in expanding the metal and facilitating easier installation. Using a portable heater may not provide uniform heating, while placing them inside a bearing furnace may not be practical or easily accessible. Soaking them in a hydraulic oil bath may not provide sufficient heat, whereas heating them in a hot-oil bath is a proven and effective method for pre-installation heating.

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  • 21. 

    To become an equipment custodian who must you be appointed by?

    • Shop chief

    • Supervisor

    • Supply chief

    • Commander

    Correct Answer
    A. Commander
    Explanation
    To become an equipment custodian, one must be appointed by the commander. The commander is the person who has the authority to appoint individuals to specific roles and responsibilities within an organization. As an equipment custodian, it is crucial to have the trust and approval of the commander, as they are ultimately responsible for the proper management and maintenance of equipment. Therefore, being appointed by the commander ensures that the individual has the necessary authorization and accountability to fulfill the duties of an equipment custodian.

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  • 22. 

    What supports base-level technicians by providing technical assistance and performing any repairs beyond their responsibility/capability?

    • Field maintenance

    • Depot Maintenance

    • Engine trending and diagnostics

    • Engine life-cycle management planning

    Correct Answer
    A. Depot Maintenance
    Explanation
    Depot Maintenance supports base-level technicians by providing technical assistance and performing any repairs beyond their responsibility/capability. This means that when base-level technicians encounter complex or difficult repairs that they are unable to handle, Depot Maintenance steps in to assist and complete the necessary repairs. They have the expertise and resources to handle more advanced repairs and ensure that the equipment or machinery is functioning properly.

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  • 23. 

    Through extensive testing, engine manufacturers determine how long a particular part should last, what is this known as?

    • Anticipated faulure rate

    • Guarenteed date

    • Drop dead rate

    • Service life

    Correct Answer
    A. Service life
    Explanation
    Engine manufacturers determine the expected lifespan of a particular part through extensive testing. This is known as the "service life" of the part. It refers to the duration for which the part is expected to function properly before it may require replacement or maintenance. The service life helps manufacturers provide guidelines to users regarding the expected longevity of the part and when it may need to be replaced.

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  • 24. 

    001. Functions within the maintenance complexWhich squadrons form the MXG?

    • QA,MOS,MXS,AMXS

    • MXS,EMS,CMS,QA

    • EMS,AMXS,QA,MOS

    • QA,MXG,AMXS,EMS

    Correct Answer
    A. QA,MOS,MXS,AMXS
    Explanation
    The correct answer is QA, MOS, MXS, AMXS. This answer is correct because the MXG (Maintenance Group) consists of various squadrons responsible for different aspects of maintenance. QA (Quality Assurance) ensures that maintenance procedures and standards are met. MOS (Maintenance Operations Squadron) oversees the overall maintenance operations. MXS (Maintenance Squadron) performs maintenance tasks on aircraft and equipment. AMXS (Aircraft Maintenance Squadron) is responsible for specific aircraft maintenance. Therefore, these squadrons form the MXG.

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  • 25. 

    What are the two purposes for the fuel/oil cooler?

    • Heat the fuel, heat the oil

    • Heat the oil,cool the fuel

    • Cool the oil,heat the fuel

    • Cool the oil, cool the fuel

    Correct Answer
    A. Cool the oil,heat the fuel
    Explanation
    The fuel/oil cooler serves two purposes: cooling the oil and heating the fuel. Cooling the oil helps to maintain its optimal temperature and prevent it from overheating, which can lead to engine damage. On the other hand, heating the fuel ensures that it reaches the appropriate temperature for combustion, improving engine performance and efficiency.

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  • 26. 

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

    • If an engine should be removed from an aircraft

    • If the engine should be sent to the test cell

    • The meanings of the instrument readings

    • What tools are required for maintenance

    Correct Answer
    A. The meanings of the instrument readings
    Explanation
    An understanding of the operating principles of engine instruments will help you decide the meanings of the instrument readings. This means that by understanding how the engine instruments work, you will be able to interpret the readings they provide accurately. This knowledge is crucial for making informed decisions about the engine, such as whether it should be removed from the aircraft or sent to the test cell for further examination. Additionally, understanding the instrument readings can also help determine what tools are required for maintenance, as it provides insight into the engine's condition and potential issues.

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  • 27. 

    Careless operation of the throttle during emergency system operation could cause a compressor stall due to what

    • A restricted air inlet

    • Rapid throttle movement

    • A restricted turbine nozzle

    • Malfunctioning variable geometry system

    Correct Answer
    A. Rapid throttle movement
    Explanation
    Rapid throttle movement during emergency system operation can cause a compressor stall. This is because sudden changes in throttle position can disrupt the flow of air into the engine, leading to a disruption in the compression process. This can result in a compressor stall, where the airflow through the engine becomes unstable and the compressor blades stall, causing a loss of engine performance. It is important to operate the throttle carefully and smoothly during emergency situations to avoid this issue.

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  • 28. 

    What is the purpose of an augmentor in a jet engine?

    • The augmentoror increases engine RPM

    • It helps reduce pressure drop

    • It augments basic engine thrust

    • Its purpose is to increase EGT

    Correct Answer
    A. It augments basic engine thrust
    Explanation
    The purpose of an augmentor in a jet engine is to increase the basic engine thrust. An augmentor is a component that is added to a jet engine to enhance its performance and provide additional thrust. It works by injecting additional fuel into the exhaust stream, which increases the temperature and velocity of the exhaust gases, thereby generating more thrust. This additional thrust helps the jet engine to achieve higher speeds and better overall performance.

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  • 29. 

    In addition to the visual inspection of the T56 engine fuel nozzles, they also require what type of inspection?

    • Spray pattern

    • Nondestructive

    • Pre-torque

    • Ultrasonic

    Correct Answer
    A. Spray pattern
    Explanation
    The correct answer is "spray pattern". In addition to visually inspecting the T56 engine fuel nozzles, they also require a spray pattern inspection. This means that not only should the nozzles be visually checked for any damage or blockages, but the pattern in which the fuel is sprayed should also be examined. This is important because an improper spray pattern can affect the engine's performance and efficiency.

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  • 30. 

    On an F100-PW-220 engine, What do the air/oil coolers mounted on the fan duct use?

    • Secondary fan airflow as a coolant

    • Secondary fan airflow as an oil heater

    • Primary core engine airflow as a coolant

    • Primary core engine airflow as an oil heater

    Correct Answer
    A. Secondary fan airflow as a coolant
    Explanation
    The air/oil coolers mounted on the fan duct of an F100-PW-220 engine use the secondary fan airflow as a coolant. This means that the coolers utilize the airflow generated by the secondary fan to cool down the oil in the engine, preventing it from overheating.

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  • 31. 

    What do you call a valve that allows fluid to flow in only one direction?

    • Check valve

    • Bypass valve

    • Relief valve

    • Pressurizing valve

    Correct Answer
    A. Check valve
    Explanation
    A check valve is a type of valve that allows fluid to flow in only one direction. It is designed to prevent backflow or reverse flow of fluid, ensuring that it can only move in a single direction. This valve is commonly used in plumbing systems, pipelines, and various industrial applications to maintain the desired flow direction and prevent any potential damage or contamination caused by backflow.

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  • 32. 

    The Jet Fuel Starter is basically a what?

    • Piston type starter

    • Pneumatic type starter

    • Small gas turbine engine

    • Cartridge pneumatic starter

    Correct Answer
    A. Small gas turbine engine
    Explanation
    The Jet Fuel Starter is a small gas turbine engine. This type of engine is commonly used to provide the initial power needed to start larger jet engines. It operates by burning jet fuel to generate hot gases, which in turn drive the turbine and produce the necessary mechanical energy to start the main engine. This small gas turbine engine is specifically designed for the purpose of starting aircraft engines efficiently and reliably.

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  • 33. 

    What provides a high energy spark to ignite the fuel during engine operation?

    • Spark ignitors

    • Compositer

    • Ignition unit

    • Transformer

    Correct Answer
    A. Spark ignitors
    Explanation
    Spark ignitors provide a high energy spark to ignite the fuel during engine operation. They are specifically designed to generate a strong electrical discharge that can ignite the fuel-air mixture in the combustion chamber. This spark is crucial for the combustion process, as it initiates the rapid burning of the fuel, leading to the release of energy that powers the engine. Without spark ignitors, the fuel would not be ignited efficiently, resulting in poor engine performance or failure to start.

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  • 34. 

    On the 54H60-91 propeller, if the main filter becomes clogged, which valve opens to assure continued flow?

    • Check

    • Bypass

    • Low pressure relief

    • High pressure relief

    Correct Answer
    A. Bypass
    Explanation
    If the main filter on the 54H60-91 propeller becomes clogged, the bypass valve opens to assure continued flow. This valve allows the fluid to bypass the clogged filter and continue flowing through the system. This ensures that there is no interruption in the flow of fluid and prevents any potential damage or malfunction due to a clogged filter.

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  • 35. 

    What can using the wrong cleanin agent on a jet engine cause?

    • It can destroy it

    • It has no effect

    • It can cause minor etching

    • Nothing, as long as the part comes clean

    Correct Answer
    A. It can destroy it
    Explanation
    Using the wrong cleaning agent on a jet engine can cause it to be destroyed. This is because certain cleaning agents may contain chemicals that are too harsh or corrosive for the materials used in the engine. These chemicals can damage or weaken the engine components, leading to malfunctions or complete failure. It is crucial to use the appropriate cleaning agents that are specifically designed for jet engines to avoid any potential damage.

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  • 36. 

    209. Jet engine overview and early air compressorsThe 3 major sections of all jet engines are compressor,combustion and

    • Diffuser

    • Turbo

    • Turbine

    • Exhaust

    Correct Answer
    A. Turbine
    Explanation
    The correct answer is turbine because it is one of the three major sections of all jet engines, along with the compressor and combustion sections. The turbine is responsible for extracting energy from the high-velocity gas produced by the combustion process and using it to drive the compressor and other engine accessories.

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  • 37. 

    When you handle jet bearings, why must you frequently change your cotton gloves?

    • They get soaked with sweat

    • They cause oxidation

    • They attract dirt

    • They wear faster

    Correct Answer
    A. They get soaked with sweat
    Explanation
    When handling jet bearings, it is necessary to frequently change cotton gloves because they can get soaked with sweat. This is important because sweat can cause moisture to accumulate on the gloves, which can lead to corrosion or oxidation of the bearings. Additionally, wet gloves can also attract dirt and debris, increasing the risk of contamination. Furthermore, wearing wet gloves for an extended period can cause them to wear faster, compromising their effectiveness in providing protection and grip. Therefore, changing gloves regularly helps maintain a dry and clean environment for handling jet bearings.

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  • 38. 

    404. F100 engineWhat controls engine operation in the primary mode? Secondary mode?

    • MFC,AFC

    • EDU,MFC

    • DEEC, MFC

    • AFC,DEEC

    Correct Answer
    A. DEEC, MFC
    Explanation
    The DEEC (Digital Electronic Engine Control) controls engine operation in the primary mode, while the MFC (Main Fuel Control) controls engine operation in the secondary mode. The DEEC is responsible for monitoring and adjusting various engine parameters such as fuel flow, turbine speed, and exhaust gas temperature, ensuring optimal performance and efficiency. The MFC, on the other hand, regulates the fuel flow to the engine based on the inputs received from the DEEC, maintaining the desired power output.

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  • 39. 

    A typical jet engine exhaust gas temperature (EGT) indicating system contains thermoucouples,leads,an indicator and what else

    • A resistor

    • A turbine inlet

    • A control valve

    • 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 an essential component in the system as it helps to regulate the flow of electrical current. It is used to measure and control the temperature of the exhaust gas by converting the temperature into a proportional electrical signal. This signal is then transmitted to the indicator, which displays the EGT reading. Additionally, the resistor helps to prevent excessive current flow and protect the thermocouples and other components in the system.

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  • 40. 

     On the F100-PW-220 engine, how does oil bypass the filter during cold weather starts?

    • It routes through the oil relief valve

    • It routes through the filter bypass valve

    • The fiter poppet valve

    • Bypassing through the oil pressure transmitter tap

    Correct Answer
    A. It routes through the filter bypass valve
    Explanation
    During cold weather starts, the oil in the F100-PW-220 engine bypasses the filter through the filter bypass valve. This valve allows the oil to flow directly into the engine without passing through the filter, which helps to prevent any potential blockages or restrictions caused by thickened oil in cold temperatures. This ensures that the engine receives an adequate oil supply during start-up, promoting smooth operation and reducing the risk of damage.

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  • 41. 

    Why should personnel exercise caution when approching the plane of roatation of a helicopters main rotor blades?

    • They droop at decreased speeds

    • The blades are lower to the ground than they appear

    • A change in wind can alter blade angle

    • They both droop and raise at decreased speeds

    Correct Answer
    A. They droop at decreased speeds
    Explanation
    Personnel should exercise caution when approaching the plane of rotation of a helicopter's main rotor blades because they droop at decreased speeds. This means that as the helicopter slows down, the blades can sag or droop closer to the ground, increasing the risk of contact with personnel or objects on the ground. This can pose a serious safety hazard, so it is important for personnel to be aware of this behavior and exercise caution when near the helicopter's rotor blades.

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  • 42. 

    021. Reliability centered maintenanceWhat are the two classifications of failurs?

    • Potential and functional

    • Functional and hidden

    • Evident and potential

    • Functional and evident

    Correct Answer
    A. Potential and functional
    Explanation
    The two classifications of failures in reliability centered maintenance are potential and functional. Potential failures refer to failures that have not yet occurred but have the potential to happen in the future. Functional failures, on the other hand, are failures that have already occurred and are affecting the performance or function of the system.

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  • 43. 

    What kind of views are available with the distal tip of the rigid borescope?

    • Only a lateral view

    • Only a Direct view

    • Up to 45 degrees

    • A direct view or lateral view

    Correct Answer
    A. A direct view or lateral view
    Explanation
    The distal tip of the rigid borescope allows for both a direct view and a lateral view. This means that the user can either look directly ahead or to the side when using the borescope. This versatility in viewing angles allows for a wider range of inspection and examination possibilities, making the rigid borescope a useful tool in various industries such as automotive, aviation, and manufacturing.

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  • 44. 

    Why should you never stack engine parts with precision finishes on concrete floors?

    • Parts can fall and cause components to become faulty

    • Parts can fall and cause damage internally

    • It can cause damage to the integrity of the finish

    • The temperature of the concrete floors erode the precision finishes

    Correct Answer
    A. It can cause damage to the integrity of the finish
    Explanation
    Stacking engine parts with precision finishes on concrete floors can cause damage to the integrity of the finish. Concrete floors are hard and rough, which can lead to scratches, dents, or other forms of damage on the precision finishes of the engine parts. This can compromise the quality and functionality of the finishes, potentially affecting the performance of the engine. Therefore, it is important to avoid stacking these parts on concrete floors to maintain the integrity of the finish and ensure the optimal functioning of the engine.

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  • 45. 

    What two forces are air subject to after it is drawn into the guide vane of a centrifigal compressor?

    • Rotational and centrifugal

    • Rotational and tangential

    • Tangential and centrifugal

    • Tangential and radial

    Correct Answer
    A. Rotational and centrifugal
    Explanation
    After air is drawn into the guide vane of a centrifugal compressor, it is subjected to two forces: rotational force, which causes the air to move in a circular motion, and centrifugal force, which pushes the air away from the center of rotation. These forces are important in the operation of the compressor as they help in compressing the air and increasing its pressure.

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  • 46. 

    Which gear in the RGB rear case turns at the same rpm as the power unit rotor?

    • Sun gear

    • Pinion input gear

    • Ring gear

    • Planetary gear

    Correct Answer
    A. Pinion input gear
    Explanation
    The pinion input gear turns at the same rpm as the power unit rotor in the RGB rear case. This gear is responsible for transmitting the rotational motion from the power unit rotor to other gears in the system. By turning at the same rpm, it ensures that the power is efficiently transferred throughout the system without any loss or variation in speed.

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  • 47. 

    What supplues the AE2100D3 FADED with power until engine RPM is sufficient for the alternator stator to take control?

    • Airplane 28 VDC power supply

    • NIU

    • MIL-STD-1553B data bus

    • Mission computer

    Correct Answer
    A. Airplane 28 VDC power supply
    Explanation
    The AE2100D3 FADED is supplied with power by the airplane's 28 VDC power supply until the engine RPM is sufficient for the alternator stator to take control. This means that the airplane's power supply provides the initial power needed for the AE2100D3 FADED until the engine reaches a certain RPM, at which point the alternator stator takes over and continues to supply power.

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  • 48. 

    Where should you begin troubleshooting when troubles exists in an engine?

    • Review aircraft forms

    • Start at the most complex unit

    • Begin by shooting wires off DEEC

    • Check engine inlet area for damage

    Correct Answer
    A. Review aircraft forms
    Explanation
    When troubles exist in an engine, reviewing aircraft forms is the best place to begin troubleshooting. This is because aircraft forms contain important information about the history, maintenance, and performance of the engine. By reviewing these forms, technicians can gather valuable insights that can help identify potential issues or patterns of malfunction. This initial step allows for a comprehensive assessment of the engine's condition and guides further troubleshooting actions to address the problems effectively.

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  • 49. 

    407.T56 ENGINEOn the T56 engine, how many and what type of fuel pumps are contained in the fuel pimp and filter assembly?

    • 3 gear; 1 boost

    • 2 gear; 2 boost

    • 2 gear; 1 boost

    • 1 gear; 2 boost

    Correct Answer
    A. 2 gear; 1 boost
    Explanation
    The T56 engine contains two gear fuel pumps and one boost fuel pump in the fuel pump and filter assembly.

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Quiz Review Timeline (Updated): Mar 19, 2023 +

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  • Current Version
  • Mar 19, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 26, 2010
    Quiz Created by
    Matthewbrattin30

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