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