Af 2A655 Cdc Study Vol 3

Front 1

What is the wire screen called in a non-pressurized reservoir?

Back 1

Finger screen.

Front 2

Why don’t variable-volume pumps require a separate pressure-regulating device in the system?

Back 2

They have an integral compensator

Front 3

What happens as the drive shaft rotates on a Stratopower pump?

Back 3

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

Front 4

In the Stratopower variable-volume pump, the pistons are held in contact with the cam plate by the

Back 4

nutating plate.

Front 5

What should be done in order to change the direction of rotation of a hydraulic motor?

Back 5

Change the direction of fluid-flow into the motor

Front 6

What principle does a filter assembly with a differential pressure indicator operate?

Back 6

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

Front 7

Hydraulic manifolds are used in a hydraulic system to provide a location where

Back 7

common fluid lines can come together.

Front 8

What should you do to ensure an automatic check valve is installed properly?

Back 8

Make sure that the arrow marked on the valve housing is pointing in the direction of free-flow.

Front 9

A balanced outlet relief valve does what?

Back 9

eliminates the effective area that back pressure can act upon

Front 10

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

Back 10

unseat one pressure poppet and one return poppet.

Front 11

In the poppet-type solenoid-operated selector valve, the poppets are attached to the solenoids by a

Back 11

plunger

Front 12

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

Back 12

Internal snubber

Front 13

How is the selector valve in a nonautomatic hydraulic actuating system controlled?

Back 13

Manually by the operator

Front 14

In an electrical follow-up system, the follow-up action will catch up and neutralize the servo valve when the

Back 14

input and follow-up transducers send the same signal to the amplifier.

Front 15

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

Back 15

Check valve.

Front 16

Hydraulic flow regulators regulate fluid-flow

Back 16

in one direction only

Front 17

A unit that can hydraulically synchronize the movement of two actuators is a

Back 17

flow equalizer

Front 18

If fluid does not split evenly in the flow equalizer, a

Back 18

free floating piston shifts position

Front 19

If we needed to lower system pressure to a subsystem to prevent an actuator from overloading the airframe, what kind of hydraulic valve would be needed?

Back 19

Pressure reducer

Front 20

What is the purpose of installing sequence valves in a hydraulic system?

Back 20

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

Front 21

What is the minimum amount of time you should perform each leakage test on a swivel joint?

Back 21

2 minutes

Front 22

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

Back 22

pulling the T-handles

Front 23

Refer to foldout 1. If the #3 engine T-handle is pulled and the firewall shutoff valve closes, but the hydraulic shutoff valve does not close, which component would you suspect of being faulty?

Back 23

The hydraulic shutoff valve.

Front 24

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 of having a malfunction is the

Back 24

engine-driven pump

Front 25

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

Back 25

Press-to-test feature of the warning light

Front 26

When filling a system reservoir, you must observe the fluid level, because overfilling may cause the reservoir to

Back 26

rupture

Front 27

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

Back 27

One quart.

Front 28

When taking fluid samples on a hydraulic system without bleeder ports, you should

Back 28

open line connections to take the sample

Front 29

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

Back 29

Reservoir

Front 30

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

Back 30

50 pounds per square inch gauge (psig).

Front 31

Which test should you perform to determine if the accumulator piston seals are leaking or bypassing?

Back 31

An internal leakage test

Front 32

When performing an internal leakage test, what is indicated by air bubbles coming out of the accumulator end cap?

Back 32

The piston is leaking.

Front 33

The purpose of the fluid quantity system test is to test the

Back 33

indication system.

Front 34

During extension and retraction, what unit slows the landing gear as it approaches the DOWN AND LOCKED and the UP AND LOCKED positions?

Back 34

Spring-loaded sliding valve snubbing assembly.

Front 35

What valve prevents door operation while the main gears are in transit?

Back 35

Shutoff

Front 36

Refer to foldout 3 for the following question. During a landing gear operational check, the main and nose gear fail to retract. You’ve determined that hydraulic pressure is available to the selector valve. What valve in the landing gear system would be the probable cause?

Back 36

Selector

Front 37

Refer to foldout 4 for the following question. During an operational check of the landing gear system, the nose gear fails to extend, but the doors open. Further investigation reveals that the nose gear actuator has no pressure to it. What would be the probable cause?

Back 37

Nose-gear sequence valve

Front 38

When troubleshooting a hydraulic malfunction, what is the first thing you should know?

Back 38

What is the full discrepancy?

Front 39

While disassembling a selector valve, you notice an "X" marked on the sleeve of the shuttle and sleeve assembly. Why is the sleeve marked in this manner?

Back 39

Shows the proper position of matched parts.

Front 40

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

Back 40

neutral

Front 41

How would a main-gear wheel brake dragging affect nosewheel steering?

Back 41

It would tend to pull the aircraft to that side.

Front 42

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

Back 42

Automatic brake actuator.

Front 43

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

Back 43

40 (+10/–0).

Front 44

After receiving a write-up for dragging brakes, you have checked the brake adjustment and found it to be correct. The next logical step in troubleshooting the problem is to check the?

Back 44

return pressure

Front 45

During a postflight debriefing, the pilot reports that the antiskid is completely inoperative. 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?

Back 45

Antiskid control box

Front 46

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

Back 46

Back pressure

Front 47

What component improves stick feel characteristics and reduces undesirable structural coupling oscillations?

Back 47

Roll damper

Front 48

What flight control surface is used to augment the ailerons to achieve the roll rate commanded either by the pilot or copilot?

Back 48

Spoiler

Front 49

What component ensures that aerodynamic loads push the spoiler panel to the retract position in the event of hydraulic system failure?

Back 49

Electro-hydraulic servo valve (EHSV).

Front 50

During a preflight check the pilot noted that he had no roll input in the mechanical mode, what is the first thing that the hydraulic technician should do?

Back 50

Consult the appropriate Fault Isolation (FI) manual

Front 51

What is the position of the boom hoist lever when the boom is being flown?

Back 51

Freewheel

Front 52

What is a probable cause if the air refueling (A/R) signal system fails to advance to MADE condition upon contact with the receiving aircraft?

Back 52

Signal coil

Front 53

Energizing the air refueling (A/R) slipway door control valve to the open side will direct hydraulic pressure to the

Back 53

open and close side of the door actuators

Front 54

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

Back 54

Hydraulically actuated downlocks

Front 55

What component(s) unlock the ramp?

Back 55

Electro-mechanical actuators

Front 56

If the cargo door will not unlatch using the manual override buttons, what would be the most probable cause?

Back 56

Cargo/air delivery system (ADS) manifold assembly

Front 57

What hydraulic component in the bomb door system controls normal and emergency hydraulic pressure to the forward door hydraulic actuator?

Back 57

Dual shuttle valve

Front 58

What would be the first step in determining why the bomb doors will not close?

Back 58

Inspect the door system for anything bent, broken, or out of place.

Front 59

What would happen if you try to open the bomb doors with pressure in the door close line, as indicated by the illuminated ground check light?

Back 59

Damage to the aircraft will occur