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If 50 pounds per square inch (PSI) of cylinder pressure acts on a 5 square inch piston head, what will the resulting force be?
250 pounds
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When an 8 square inch piston moves 5 inches within a cylinder, what volume of liquid is displaced?
40 cubic inches
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Turbulence affects fluid flow in a hydraulic line by...
creating resistance and loss of energy.
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A tube whose cross section area is gradually reduced to a smaller sized diameter is called a...
venturi
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The purposes of a hydraulic reservoir are to...
replenish fluid, allow for thermal expansion, and provide a means of bleeding air from the system
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The purpose of a stand-pipe in a reservoir is to...
reserve fluid for the emergency pump.
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The amount of fluid a pump produces on each cycle or revolution is called its
displacement.
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When referring to hydraulic hand pumps, double action means
Fluid flow is created with each stroke of the pump handle.
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Variable volume pumps do not require a separate regulating device in the system because
They have an integral compensator.
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What provides for cooler operation in a stratopower variable volume hydraulic pump?
Creep plates.
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In the strato-power variable vol. pump, what holds the pistons in contact with the cam plate?
nutating plate
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The purpose of a hydraulic motor is to convert hydraulic pressure into
rotary mechanical motion.
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How is the piston installed in an accumulator?
Hollow end toward the air side of the accumulator.
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The size of 1 micron is 4...
Millionths of an inch.
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In a hydraulic system, the hydraulic manifold provides a location where the..
common fluid lines can come together.
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The purpose of an actuating cylinder is to transform fluid pressure into...
a mechanical force
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What pneudraulic system component uses a single acting actuating cylinder?
break assembly
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What pneudraulic system component uses a double acting balanced actuating cylinder?
Nose wheel steering
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Which actuating type slows down piston travel when the piston nears either end of the cylinder?
internal snubber
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A manual poppet type selector valve is in a working position when the cam shaft is rotated to
unseat 1 pressure poppet and 1 return poppet.
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A major advantage of the manual slide type hydraulic selector valve is its...
Metering ability
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normally, what positions hydraulic selector valves?
Solenoid
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The advantage of the electrically controlled solenoid valve is its...
reduced weight.
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The difference between selector valve and a servo valve is that the...
Servo valve controls fluid flow.
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Another name for a flapper check valve is...
Gate check valve.
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What is the purpose of the arrow on a check valve?
Shows direction of free-flow through the valve.
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Which of these allow normal operating speed of a hydraulic actuator in one direction while LIMITING speed in the Other direction?
Restrictor check valve
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What are the basic units of the hydraulic hand pump system?
Reservoir, pump, actuator, and a manual shut-off valve.
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The reservoir supplies hydraulic fluid to a handpump...
by gravity and the suction effect of the pump.
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When pressure in a hydraulic system with a variable volume pump increases, the fluid flow...
Decreases.
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The purpose of the torsion links on a main landing gear is to..
prevent the inner cylinder from rotating within the outer cylinder.
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how is the motion of the landing gear control level transmitted to the selector valve?
by a cable system
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what prevents the lock solenoid from energizing when the nose landing gear is off center?
Centering switch
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electromagnetic devices capable of sensing magnetically conducive metal targets on landing gears are known as...
Proximity sensors
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a unit that is a combination of the landing gear shimmy damper and steering unit is known as?
a steer damper
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what position must the landing gear control handle be in before emergency extension of the landing gear?
DN
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what slows the free fall of the main landing gear during the emergency extension sequence?
Snubbing mechanism
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the purpose of the landing gear warning horn is to...
sound when gear is not safe
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brake fade is defined as a gradual braking action...
loss due to overheating
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a major disadvantage of multiple disc brakes is that they...
warp when overheated
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what automatically compensates for brake wear on the segmented rotor brake?
Adjusters
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the purpose in the anti skid system is to?
prevent wheel skid by releasing pressure from the skidding wheel
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the purpose of deboosters is to...
reduce braking pressure
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aircraft wheels are normally constructed of...
magnesium and/or aluminum alloys
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split wheels are balanced...
individually by halves
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what maintains an airtight seal between split wheel halves?
An O-Ring seal
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what prevents tire explosion from excessive heat buildup?
Thermal relief plugs
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what are the type of bearings used on aircraft wheels?
Tapered roller
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the bearing cone of an aircraft wheel bearing is also called the...
inner race
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when cleaning aircraft wheels, you should NOT use...
a Wire brush
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installing bearing races should be free of scratches, dents, and...
Overheating marks
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the main parts of an aircraft tire are the tread and sidewall,...
cord body, and beads
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what prevents pressure buildup and separation of cord plies of tread rubber on an aircraft tire?
Vent holes
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for tires 24 inches or greater outside diameter, the tire must be removed when wear reaches the bottom of any tread grove for a continuous length of...
12 inches
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