2A655 Volume 3 Unit Review 1-60(Aircraft)

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  • 1/60 Questions

    If a hydraulic system is found to be contaminated, where should you begin draining the affected system?

    • Brakes
    • Reservoir
    • Flap actuators
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Aircraft Quizzes & Trivia
About This Quiz

The 2A655 Volume 3 Unit Review 1-60 focuses on hydraulic systems in aircraft, assessing knowledge on hydraulic pumps, motors, and reservoir pressures. It is designed for individuals seeking to understand or reinforce their understanding of aircraft hydraulic mechanics.

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  • 2. 

    (411)  When filling a system reservoir, you must obseve the fluid level, because overfilling may cause the reservoir to

    • Vent

    • Rupture

    • Overheat

    Correct Answer
    A. Rupture
    Explanation
    Overfilling the system reservoir can cause it to rupture. When the reservoir is filled beyond its capacity, the excess fluid puts pressure on the walls of the reservoir, potentially causing it to burst. This can lead to fluid leakage and damage to the surrounding components of the system. Therefore, it is important to observe the fluid level and avoid overfilling to prevent any potential rupture of the reservoir.

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  • 3. 

    (422)  During a postflight debriefing, the pilot reports that the antiskid is completely inopertive.  Upon inspection you find that the antiskid switch is ON, and all circuit breakers are engaged. What would be the next component to be checked 

    • Brake pedals

    • The accumulator

    • Antiskid control box

    Correct Answer
    A. Antiskid control box
    Explanation
    The next component to be checked would be the antiskid control box. Since the antiskid switch is ON and all circuit breakers are engaged, the issue is likely with the control box itself. By inspecting the control box, it can be determined if there is a malfunction or any other issue that is causing the antiskid system to be completely inoperative.

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  • 4. 

    (424)  In the aircraft's roll axis, what system compensates for imbalance or external enviromental conditions that affects stabilized flight? 

    • Mechanical

    • Elecrical

    • Trim

    Correct Answer
    A. Trim
    Explanation
    The trim system in the aircraft's roll axis compensates for any imbalance or external environmental conditions that affect stabilized flight. This system helps to adjust the aircraft's control surfaces to maintain a desired attitude and reduce the pilot's workload. By making small adjustments to the trim, the aircraft can counteract any imbalances or external factors that may cause it to roll off course, ensuring a more stable and controlled flight.

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  • 5. 

    (409)  In an emergency, the shutoff valves of the engine- driven hydraulic pump may be operated by

    • Stopping the engines

    • Pulling the fire handles

    • Pulling the circuit breakers

    Correct Answer
    A. Pulling the fire handles
    Explanation
    In an emergency, pulling the fire handles is the correct way to operate the shutoff valves of the engine-driven hydraulic pump. This is because pulling the fire handles will activate the fire suppression system, which includes shutting off the fuel flow to the engines and cutting off the hydraulic pump. This action helps to prevent further damage or potential fire hazards in the event of an emergency.

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  • 6. 

    (402) In the Stratopower variable-volume pump, the piston are held in contact with the cam plate by the

    • Fixed pivot

    • Fixed pivot

    • Nutating plate

    Correct Answer
    A. Nutating plate
    Explanation
    The Stratopower variable-volume pump uses a nutating plate to hold the pistons in contact with the cam plate. The nutating plate is a component that moves in a circular motion, causing the pistons to follow the contour of the cam plate. This allows for efficient pumping action and ensures that the pistons maintain contact with the cam plate throughout the pumping process. The use of a nutating plate in this pump design helps to optimize performance and reliability.

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  • 7. 

    (402) In order to change the direction of rotation of a hydraulic motor, what should be done?

    • Change the foot values

    • The head should be rotated 180 degrees

    • Change the direction of fluid flow into the motor

    Correct Answer
    A. Change the direction of fluid flow into the motor
    Explanation
    To change the direction of rotation of a hydraulic motor, the direction of fluid flow into the motor should be changed. Hydraulic motors rely on the flow of fluid to generate rotational motion. By reversing the direction of fluid flow, the motor will rotate in the opposite direction. This can be achieved by adjusting the valves or changing the configuration of the hydraulic system to redirect the fluid flow.

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  • 8. 

    (402) Variable-volume pumps do not require a seperate pressure regulating device in the system because

    • They deliver low pressure

    • They have an integral compenator

    • The case drain wil relieve high system pressure

    Correct Answer
    A. They have an integral compenator
    Explanation
    Variable-volume pumps do not require a separate pressure regulating device in the system because they have an integral compensator. This means that the pump is able to automatically adjust its output pressure based on the system's demand. The integral compensator allows the pump to maintain a consistent pressure without the need for an additional regulating device.

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  • 9. 

    (406)  What type of actuator has characteristic  of the travel of the piston will slow down when the piston nears either end of the cylinder?

    • Tandem

    • Internal locking

    • Internal snubber

    Correct Answer
    A. Internal snubber
    Explanation
    An internal snubber is a type of actuator that has the characteristic of slowing down the travel of the piston when it nears either end of the cylinder. This is achieved through the use of internal mechanisms that provide resistance or dampening effect, reducing the speed of the piston as it reaches the ends of the cylinder. This helps to prevent abrupt stops or impacts, ensuring smoother and more controlled movement of the actuator.

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  • 10. 

    (428)  What is a probable cause if the signal system fails to advance to MADE conditions upon contact with the receiving aircraft?

    • Signal coil

    • Power relay

    • Limit switches

    Correct Answer
    A. Signal coil
    Explanation
    If the signal system fails to advance to MADE conditions upon contact with the receiving aircraft, a probable cause could be a malfunctioning or faulty signal coil. The signal coil is responsible for transmitting the necessary signals to advance the system, so if it is not functioning properly, it can prevent the system from advancing as it should.

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  • 11. 

    (430) The cargo door is retracted upward into the aft fusealge cavity by

    • A single hydraulic actuator

    • A single electric actuator

    • Two hydraulic actuators

    Correct Answer
    A. Two hydraulic actuators
    Explanation
    The cargo door is retracted upward into the aft fuselage cavity by two hydraulic actuators. These actuators are responsible for the movement and retraction of the door. Having two actuators ensures that there is redundancy in the system, providing a backup in case one actuator fails. This redundancy is crucial for the safe operation of the cargo door, as any failure in the actuator could result in a malfunction or inability to retract the door properly.

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  • 12. 

    (408)  In a typical electrically sequenced system, what unit is used to ensure proper sequencing?

    • Microswitch

    • Thermal switch

    • Priority valve

    Correct Answer
    A. Microswitch
    Explanation
    In a typical electrically sequenced system, a microswitch is used to ensure proper sequencing. A microswitch is a small mechanical switch that is activated by a physical force, such as a lever or button. It is commonly used in control systems to detect and control the position or presence of an object. In the context of sequencing, a microswitch can be used to detect the completion of one task before initiating the next, ensuring that the system operates in the correct sequence.

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  • 13. 

    (413)  When bench checking a hydraulic pump, which test will indicate the amount of torque required to turn the pump driveshaft?

    • Capacity test

    • Static test

    • Drive shaft torque test

    Correct Answer
    A. Drive shaft torque test
    Explanation
    The drive shaft torque test is the appropriate test to determine the amount of torque required to turn the pump driveshaft. This test specifically focuses on measuring the torque needed to rotate the driveshaft, providing valuable information about the pump's performance and efficiency. By conducting this test during bench checking, technicians can ensure that the pump is functioning properly and meets the required torque specifications.

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  • 14. 

    (408)  What is the purpose of installing sequence valves in a system?

    • So only one system can operate at a time.

    • To ensure that system actuators extend and retract at the same rate

    • So one operation is performed before the rest of the system can operate

    Correct Answer
    A. So one operation is performed before the rest of the system can operate
    Explanation
    Sequence valves are installed in a system to ensure that one operation is performed before the rest of the system can operate. This helps in maintaining a specific order or sequence of operations, preventing simultaneous or undesired actions. By controlling the flow of fluid, sequence valves allow for a systematic and organized functioning of the system, ensuring that each operation is completed before the next one begins.

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  • 15. 

    (408)  How long should you perform a leakage test on a swivel joint?

    • 2 min

    • 10 min

    • 20 min

    Correct Answer
    A. 2 min
    Explanation
    A leakage test on a swivel joint should be performed for 2 minutes. This duration allows enough time to detect any potential leaks in the joint without wasting excessive time. It strikes a balance between ensuring the joint's integrity and efficiency in completing the test. A shorter duration may not provide enough time to identify leaks accurately, while a longer duration may be unnecessary and time-consuming.

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  • 16. 

    (410)  With the engine shutdown,  one of the engine pumps low-pressure warning lights fails to come on, what would be the first thing yopu should check?

    • Faulty bulb

    • Internal leakage in vavlve

    • Press to test frature of the bulb

    Correct Answer
    A. Press to test frature of the bulb
    Explanation
    The first thing you should check is the press to test feature of the bulb. This means that you need to press the bulb to see if it lights up, indicating that it is functioning properly. If the bulb does not light up, then it is likely faulty and needs to be replaced. This is important because the low-pressure warning light is crucial for indicating any issues with the engine pump, and a faulty bulb could lead to a failure in detecting potential problems.

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  • 17. 

    (411)  When bleeding a power system, how much additional fluid should you bleed out after air bubbles are no longer evident

    • One quart

    • One-half quart

    • One gallon

    Correct Answer
    A. One quart
    Explanation
    After bleeding the power system and removing air bubbles, it is recommended to bleed out an additional one quart of fluid. This is necessary to ensure that all air pockets are completely eliminated from the system, as even small amounts of air can cause issues with the system's performance and efficiency. Bleeding out this additional amount of fluid helps to ensure that the power system is properly filled and functioning optimally.

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  • 18. 

    (430) From what position can you operate the cargo door and ramp manually?

    • Forward loadmaster's control panel

    • Aft loadmaster's control panel

    • Co-pilots ADS panel

    Correct Answer
    A. Aft loadmaster's control panel
    Explanation
    The correct answer is the aft loadmaster's control panel. This panel is located at the back of the aircraft and allows the loadmaster to operate the cargo door and ramp manually. The forward loadmaster's control panel may not have the necessary controls for this operation, and the co-pilot's ADS panel is unrelated to cargo door and ramp operation.

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  • 19. 

    (421)  In the event a brake line ruptures and the hydraulic fuse sets, how much hydraulic fluid( in cubic inches) will be lost?

    • 10(+5/-0)

    • 20(+10/-0)

    • 40(+10/-0)

    Correct Answer
    A. 40(+10/-0)
    Explanation
    If a brake line ruptures and the hydraulic fuse sets, it means that the hydraulic fuse will activate and stop the flow of hydraulic fluid. Therefore, the amount of hydraulic fluid lost will depend on the size of the brake line and the pressure at which the hydraulic system operates. Since the answer is 40(+10/-0) cubic inches, it suggests that in this scenario, approximately 40 cubic inches of hydraulic fluid will be lost.

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  • 20. 

    (402) what happens as the drive shaft rotates on a Stratopower pump?

    • Both the cylinder block and pistons rotate.

    • The universal link and cylinder block rotates.

    • The pistons move back and forth, and the cylinder block is stationary.

    Correct Answer
    A. The pistons move back and forth, and the cylinder block is stationary.
    Explanation
    As the drive shaft rotates on a Stratopower pump, the pistons move back and forth while the cylinder block remains stationary. This means that the pistons are responsible for creating the pumping action, while the cylinder block serves as a stable housing for the pistons.

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  • 21. 

    (403)  What principle does a filter assembly with a differential pressure indicator operator?

    • The increase of fluid viscosity as the temperature is lowered

    • The difference between pressure entering the element and pressure leaving the element

    • The spring loaded magnetic indicator postin pop-up when contaminated

    Correct Answer
    A. The difference between pressure entering the element and pressure leaving the element
    Explanation
    A filter assembly with a differential pressure indicator operates based on the principle of measuring the difference between the pressure entering the filter element and the pressure leaving the filter element. This allows the operator to monitor the pressure drop across the filter, which indicates the level of contamination or clogging. By observing the differential pressure, the operator can determine when the filter needs to be cleaned or replaced to maintain optimal filtration efficiency.

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  • 22. 

    (414) While performing an internal leakage test, you notice air bubbles coming out of the accumulator end cap.  This indicates that

    • Excessive gas pressure is being applied

    • The accumulator is not properly vented

    • The end cap is leaking

    • The piston is leaking

    Correct Answer
    A. The piston is leaking
    Explanation
    If air bubbles are coming out of the accumulator end cap during an internal leakage test, it indicates that the piston is leaking. The piston is responsible for separating the gas and liquid in the accumulator, and if it is leaking, it allows gas to escape into the liquid side, causing air bubbles to be released from the end cap. This suggests that there is a problem with the piston's seal or integrity, leading to the leakage.

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  • 23. 

    (404)  If a relief valve with a ball seat area of 1/6 sq. in to relive 1800psi. the spring tension would

    • Be 1800 lbs

    • Be 30 lbs with no back pressure

    • Be 300 lbs with no back pressure

    Correct Answer
    A. Be 300 lbs with no back pressure
    Explanation
    The correct answer is "be 300 lbs with no back pressure". This means that the spring tension of the relief valve would need to be 300 lbs in order to relieve the pressure of 1800 psi. The ball seat area of 1/6 sq. in is not relevant to determining the spring tension.

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  • 24. 

    (405) A manual poppet-type selector valve is in a working position when the camshaft is rotated to

    • Seat all forur poppets

    • Seat both of the pressure poppets

    • Unseat one pressure poppet and one return

    Correct Answer
    A. Unseat one pressure poppet and one return
    Explanation
    The correct answer is "unseat one pressure poppet and one return." This means that when the camshaft is rotated, it causes one pressure poppet and one return poppet to become unseated. This action allows fluid to flow through the valve in a specific direction, depending on the design and configuration of the valve.

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  • 25. 

    (410) When the pump low pressure warning light comes on while the engines are running and the pressure reading on the accumulator pressure gauge reads low, the first component that should be suspected if having a malfunction is the

    • Snubber

    • Accumulator

    • Engine driven pump

    Correct Answer
    A. Engine driven pump
    Explanation
    When the pump low pressure warning light comes on and the pressure reading on the accumulator pressure gauge reads low, it indicates that there is a problem with the pump system. The engine driven pump is responsible for maintaining the pressure in the system, so it is the first component that should be suspected of malfunctioning. The low pressure warning light and low pressure reading on the gauge suggest that the pump is not functioning properly, causing a decrease in pressure. Therefore, the engine driven pump is the most likely component to be causing the issue.

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  • 26. 

    (421)  During landing-gear retraction, what unit applies the brakes to stop wheel spin?

    • Automatic brake actuator

    • Copilot's metering valve

    • Copilot's brake pedals

    Correct Answer
    A. Automatic brake actuator
    Explanation
    During landing-gear retraction, the automatic brake actuator applies the brakes to stop wheel spin. This unit is responsible for automatically engaging the brakes when the landing gear is being retracted to prevent the wheels from spinning freely. The automatic brake actuator ensures that the wheels are properly controlled and do not rotate excessively during the retraction process, enhancing the safety and stability of the aircraft.

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  • 27. 

    (401)  If a hydraulic reservoir is pressurized to 25psi, what would be the minimum psi pressure in the return line to the reservoir?

    • 5

    • 25

    • 50

    Correct Answer
    A. 25
    Explanation
    The minimum psi pressure in the return line to the reservoir would be 25. This is because the hydraulic reservoir is already pressurized to 25 psi, so the pressure in the return line would need to be at least the same in order for the fluid to flow back into the reservoir.

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  • 28. 

    (414)  Which test should you perform to determineif the seals on the piston of an accumulator are leaking?

    • Proof pressure test

    • Internal leakage test

    • External leakage test

    • Piston seizure

    Correct Answer
    A. Internal leakage test
    Explanation
    To determine if the seals on the piston of an accumulator are leaking, you should perform an internal leakage test. This test involves pressurizing the accumulator and then monitoring the pressure over a period of time. If the pressure decreases significantly, it indicates that there is internal leakage in the seals. This test helps to identify any potential issues with the seals and allows for timely maintenance or replacement to prevent further damage or failure of the accumulator.

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  • 29. 

    (423)  During the testing of a brake assembly, you reduce the pressure to 75psi, what are you simulating?

    • Back Pressure

    • Static Pressure

    • Emergency Pressure

    Correct Answer
    A. Back Pressure
    Explanation
    Reducing the pressure to 75psi during the testing of a brake assembly simulates back pressure. Back pressure refers to the resistance or force exerted against the normal flow of fluid or gas in a system. In the context of a brake assembly, back pressure simulates the resistance or force that occurs when the brakes are applied, mimicking real-world conditions and allowing for accurate testing and evaluation of the brake system's performance.

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  • 30. 

    (424)  What surface is used to augment the ailerons to achieve the roll rate commanded either by the pilot or copilot?

    • Elevator

    • Rudder

    • Spoiler

    Correct Answer
    A. Spoiler
    Explanation
    Spoilers are used to augment the ailerons to achieve the roll rate commanded by the pilot or copilot. Spoilers are surfaces located on the wings that disrupt the airflow over the wings, reducing lift and increasing drag. By deploying spoilers on one wing while retracting them on the other, the aircraft can roll in the desired direction. This helps in controlling the roll motion of the aircraft during maneuvers and allows for precise control of the aircraft's bank angle.

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  • 31. 

    (426)  During a preflight check the pilot noted that he had no roll input in the mechanical mode, what is the first thing he/she should do?

    • Perform an operational check

    • Consult the appropriate fault isolation manual

    • Consult the appropriate General System manual

    Correct Answer
    A. Consult the appropriate fault isolation manual
    Explanation
    The pilot should consult the appropriate fault isolation manual first. This manual provides specific instructions and procedures for troubleshooting and identifying the cause of a fault or issue. By consulting this manual, the pilot can follow the recommended steps to diagnose and rectify the problem with the roll input in the mechanical mode. It is an essential resource for troubleshooting and resolving any system-related issues.

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  • 32. 

    (427) What connects the tandem surge boots to the fuel tube weld assembly?

    • Gland nuts

    • Spacer rings

    • Seal assembly

    Correct Answer
    A. Gland nuts
    Explanation
    The correct answer is gland nuts. Gland nuts are used to connect the tandem surge boots to the fuel tube weld assembly. They provide a secure and tight connection between the two components, ensuring that there are no leaks or loose fittings. Gland nuts are typically threaded onto the fuel tube and tightened to create a seal, effectively connecting the surge boots to the fuel tube weld assembly.

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  • 33. 

    (429)  During breakaway of the air-refueling nozzle, what valve prevents excessive pressure building in the toggle actuators?

    • Bypass

    • Relief

    • Shuttle

    Correct Answer
    A. Relief
    Explanation
    The relief valve prevents excessive pressure from building in the toggle actuators during breakaway of the air-refueling nozzle. This valve is designed to open and release pressure when it reaches a certain level, ensuring that the actuators are not damaged by excessive pressure.

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  • 34. 

    (412)  When taking fluid samples on a hydraulic system  that does not have bleeder ports, you should

    • Remove and replace the filters

    • Take the sample from the reservoir only

    • Open line connections to take the sample

    Correct Answer
    A. Open line connections to take the sample
    Explanation
    When taking fluid samples on a hydraulic system that does not have bleeder ports, it is necessary to open line connections to take the sample. This is because without bleeder ports, there is no other way to access the fluid in the system. By opening line connections, the fluid can be extracted for sampling purposes. Removing and replacing the filters or taking the sample from the reservoir only would not provide an accurate representation of the fluid within the system.

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  • 35. 

    (415)  The purpose of the fluid quantity system test is to test the

    • Pressurization system

    • Indication system

    • Nitrogen system

    Correct Answer
    A. Indication system
    Explanation
    The purpose of the fluid quantity system test is to test the indication system. This system is responsible for providing accurate and reliable information about the fluid levels in various components of the system. By testing the indication system, the functionality and accuracy of the fluid level indicators can be verified. This is important for ensuring the safe and efficient operation of the fluid quantity system, as it allows operators to monitor and maintain appropriate fluid levels during operation.

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  • 36. 

    (413)  when testing a newly-overhauled pump on the hydraulic test stand, why should the pump have a break in period?

    • Ensure proper operattion at all pressure and revolutions per minute settings

    • Ensure that fluid in the test stand is properly heated

    • Provide a check of leakage rate at the shaft seal

    Correct Answer
    A. Ensure proper operattion at all pressure and revolutions per minute settings
    Explanation
    The break-in period is necessary to ensure proper operation of the newly-overhauled pump at all pressure and revolutions per minute settings. During this period, the pump is run at various speeds and pressures to allow the components to settle into their proper positions and ensure that they are functioning correctly. This helps to identify any potential issues or malfunctions before the pump is put into regular use, ensuring its reliability and efficiency.

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  • 37. 

    (430) What componenet(s) aid in forcing the cargo door down?

    • Hydrualic roller assembly

    • Electriacally actuated downlocks

    • Hydraulically actuated downlocks

    Correct Answer
    A. Hydraulically actuated downlocks
    Explanation
    Hydraulically actuated downlocks are components that aid in forcing the cargo door down. These downlocks use hydraulic power to secure and lock the cargo door in place, ensuring that it remains closed during flight. By using hydraulics, the downlocks are able to provide a strong and reliable force to keep the cargo door securely shut, even under high pressure or turbulence. This ensures the safety and integrity of the aircraft's cargo during flight.

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  • 38. 

    (419)  Nose wheel steering shimmy dampening is effective when the valve plunger is in

    • Extend

    • Retract

    • Neutral

    Correct Answer
    A. Neutral
    Explanation
    Nose wheel steering shimmy dampening is effective when the valve plunger is in the neutral position. This means that the valve is neither extended nor retracted. In this position, the valve is able to effectively dampen any vibrations or oscillations in the nose wheel steering system, preventing shimmying.

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  • 39. 

    (406)  When a power control cylinder is in the manual mode, what compnent allows the fluid to flow from one side of the main actuator to the other

    • Solenoid operated shutoff valve

    • Bypass valve

    • Servo ram

    Correct Answer
    A. Bypass valve
    Explanation
    When a power control cylinder is in manual mode, the bypass valve allows the fluid to flow from one side of the main actuator to the other. The bypass valve acts as a pathway for the fluid to bypass the main actuator, allowing for manual control of the power control cylinder.

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  • 40. 

    (407)  Which type of orifice allows normal speed of operation in one direction, but limits speed in the other

    • Fixed

    • Variable

    • Check valve

    Correct Answer
    A. Check valve
    Explanation
    A check valve is a type of orifice that allows normal speed of operation in one direction, but limits speed in the other direction. It is designed to allow fluid flow in one direction while preventing backflow in the opposite direction. This is achieved through a valve mechanism that opens when the fluid flows in the desired direction and closes when there is reverse flow or pressure. As a result, the check valve acts as a speed limiter, allowing fluid to flow freely in one direction but restricting its flow in the opposite direction.

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  • 41. 

    (407)  Hydraulic flow regulators regulate fluid flow

    • In both directions

    • In one direction

    • Only when there is macimum load on the actuator

    Correct Answer
    A. In one direction
    Explanation
    Hydraulic flow regulators are devices that control the flow of fluid in a hydraulic system. They are designed to regulate the flow in one specific direction, allowing fluid to pass through in that direction while restricting or blocking flow in the opposite direction. This helps to control the speed and pressure of the fluid in the system, ensuring that it flows smoothly and efficiently. Therefore, the correct answer is "in one direction."

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  • 42. 

    (408)  If we needed to lower system pressure to a subsystem to prevent an actuator from overloading the airframe, what hydraulic valve would we need?

    • Relief

    • Flow control

    • Pressure reducer

    Correct Answer
    A. Pressure reducer
    Explanation
    A pressure reducer hydraulic valve would be needed in this scenario to lower the system pressure to a subsystem. This valve is designed to regulate and decrease the pressure of the hydraulic fluid flowing through it, which would help prevent the actuator from overloading the airframe.

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  • 43. 

    (409)  Refer to foldout 1.  If the fire control handle on No. 3 engine is pulled and the suction shutoff valve closes, but the pressure shutoff valve does not close, which component would yo suspect of being faulty

    • Suction shutoff valve

    • No. 3 engine relay

    • Pressure shutoff valve

    Correct Answer
    A. Pressure shutoff valve
    Explanation
    If the fire control handle on No. 3 engine is pulled and the suction shutoff valve closes but the pressure shutoff valve does not close, it suggests that the pressure shutoff valve is faulty. The fire control handle is designed to shut off both the suction and pressure valves in order to stop the flow of fuel to the engine during a fire. If the suction shutoff valve is closing properly but the pressure shutoff valve is not, it indicates that there is an issue with the pressure shutoff valve specifically.

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  • 44. 

    (417)  What would you use to remove the sleeve from a selector valve body?

    • Magnet

    • Brass dowel

    • Wooden dowel

    Correct Answer
    A. Wooden dowel
    Explanation
    A wooden dowel would be used to remove the sleeve from a selector valve body. This is because a wooden dowel is a non-abrasive and non-magnetic tool that can be used to gently tap or push the sleeve out of the valve body without causing any damage. The wooden dowel is preferred over a brass dowel or magnet in this case because it is less likely to scratch or magnetically attract any metal components, ensuring a safe and effective removal process.

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  • 45. 

    (429)  Energizing the slipway door control valve to the open side will direct hydraulic pressure to the

    • Toggle latches only

    • Open side of the slipway door actuators

    • Open and close side of the door actuators

    Correct Answer
    A. Open and close side of the door actuators
    Explanation
    Energizing the slipway door control valve to the open side will direct hydraulic pressure to both the open and close side of the door actuators. This means that when the control valve is energized, it will activate both sides of the door actuators, allowing them to open and close the slipway door as needed.

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  • 46. 

    (414)  When accomplishing a piston seizure test on a hydraulic accumulator, hydraulic pressure should not exceed

    • 50 psig

    • 100 psig

    • 1500 psig

    Correct Answer
    A. 50 psig
    Explanation
    When accomplishing a piston seizure test on a hydraulic accumulator, it is important to ensure that the hydraulic pressure does not exceed 50 psig. This is because exceeding this pressure limit can result in a piston seizure, which can cause damage to the hydraulic system. Keeping the pressure below 50 psig ensures that the test is conducted safely and prevents any potential issues or damage.

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  • 47. 

    (415)  The purpose of the proof pressure test while bench checking a reservoir is to check for

    • Deformation/ failure

    • Internal leakage

    • Piston leakage

    Correct Answer
    A. Deformation/ failure
    Explanation
    The purpose of the proof pressure test while bench checking a reservoir is to check for deformation/failure. This test is conducted to ensure that the reservoir can withstand the maximum pressure it is designed for without any structural damage or failure. By subjecting the reservoir to a higher pressure than its normal operating pressure, any potential deformations or failures can be identified and addressed before the reservoir is put into service. This test helps ensure the reliability and safety of the reservoir during its operation.

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  • 48. 

    (420)  If the aircraft tends to steer only to the left, which statement is not a probable cause?

    • Dragging brakes

    • Shock strut conical bearings binding

    • Metering valve malfunction

    Correct Answer
    A. Shock strut conical bearings binding
    Explanation
    The statement "shock strut conical bearings binding" is not a probable cause for the aircraft tending to steer only to the left. The shock strut conical bearings are responsible for absorbing shocks and providing stability to the landing gear, but they do not directly affect the steering of the aircraft. Dragging brakes and a metering valve malfunction can both cause the aircraft to steer to one side, as they can create uneven braking forces or affect the hydraulic system that controls the steering.

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  • 49. 

    (404) Which line is a manually-operated check valve usually installed?

    • Pressure

    • Supply

    • Return

    Correct Answer
    A. Pressure
    Explanation
    A manually-operated check valve is typically installed in the pressure line. This is because the purpose of a check valve is to allow fluid flow in one direction and prevent backflow. By installing it in the pressure line, it ensures that the fluid can only flow in the desired direction, maintaining the desired pressure in the system.

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Quiz Review Timeline (Updated): Mar 21, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 24, 2012
    Quiz Created by
    Fernandoben

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