Self Test Questions Vol.3

Front 1

Why do non pressurized reservoirs have space above the fluid?

Back 1

To allow the fluid to purge itself of air bubbles that it picked up from the hydraulic system.

Front 2

What prevents foreign material from entering the reservoir during servicing?

Back 2

The finger screen or wire screen.

Front 3

What are the two main reasons for pressurizing a reservoir?

Back 3

One: it stops the fluid from foaming at high altitudes and Two: it ensures a positive supply of fluid to the pumps.

Front 4

how is a hydraulic prefers reservoir serviced with the fluid?

Back 4

Through the self sealing filler valve.

Front 5

What is used to prevent damage to a hydraulic pressurized reservoir during servicing?

Back 5

A relief valve.

Front 6

What is the first thing you must do in order to service or perform maintenance on an air pressurized reservoir?

Back 6

Depressurize the reservoir.

Front 7

What component in a pressurized hydraulic reservoir system controls the air pressure within safe limits?

Back 7

The air pressure regulator.

Front 8

In an air pressurized reservoir, where is the air for reservoir pressurization usually taken from?

Back 8

Usually from the aircrafts engine bleed air.

Front 9

The hand pump has 3 check valves, what would happen if the hand pump had only TWO check valves and one of them malfunctioned?

Back 9

The hand pump will become completely inoperative.

Front 10

What is the drawback of a constant volume pump?

Back 10

As long as the pump rotates, the fluid flow it produces will eventually build up a high enough pressure in the confined area to burst the lines and container.

Front 11

what is the thinned portion on the drive shaft of a gear type pump called?

Back 11

The Shear section.

Front 12

on a vane type pump what keeps the vanes against the housing wall?

Back 12

The springs.

Front 13

In the constant volume piston pump, what drives the cylinder block?

Back 13

The universal link.

Front 14

Why does constant volume piston pump always have a constant intake and output of fluid?

Back 14

They're always Pistons somewhere between upper and lower position.

Front 15

What happens to the excess case drain pressure in a constant volume piston pump?

Back 15

It is routed back to the intake side of the pump.

Front 16

Describe the suction boost pumps impeller.

Back 16

It is like a paddle wheel on a steamboat that slings the fluid out word from the center, causing the fluid to exit through the outlet port.

Front 17

What is the suction boost pump do for the engine driven pumps?

Back 17

It ensures the engine pumps getting adequate supply of fluid.

Front 18

What regulates pressure in a variable volume pump?

Back 18

An integral flow control valve. aka an integral compensator.

Front 19

what is the main difference between a Vickers stroke reduction pump and a constant volume pump?

Back 19

The angle between the drive shaft in the cylinder block.

Front 20

When the system is at 0 psi, the Vickers pumps cylinder block and yoke are in what position to provide full flow?

Back 20

The extreme angle position.

Front 21

Do the Pistons have a stroke when the Vickers pump Reaches the zero flow point?

Back 21

No.

Front 22

The Kellogg pump is made up of two major component groups what are they?

Back 22

The rotating group in the pressure compensating group.

Front 23

What determines the Kellogg pumps length of piston stroke?

Back 23

The angle setting of the cam plate.

Front 24

What is the purpose of the creep plates in the stratopower Pump?

Back 24

Cooler operation and more even wear on the cam plate.

Front 25

Describe the Pistons of the stratopower Pump.

Back 25

The Pistons have fairly large hollow centers connected with cross drilled holes.

Front 26

if the Strato Power Pump senses pressure increase what component is acted on to reduce the pressure?

Back 26

The compensator piston.

Front 27

On the Strato Power Pump, which way would you turn the adjusting screw screw to increase the pressure?

Back 27

Clockwise.

Front 28

List the differences between a hydraulic pump and a hydraulic motor.

Back 28

Flow is directed into the motor rather than from it and the motor does not have a foot valve.

Front 29

What can be used to control the speed of a hydraulic motor?

Back 29

The flow control valve.

Front 30

Explain the principle of a jackscrew.

Back 30

The screw turns and causes the nut to move back and forth along the screw.

Front 31

Which chamber of the self displacing accumulator is serviced with fluid when the supply system is serviced with the hand pump?

Back 31

The storage chamber.

Front 32

What is the purpose of a compensator in a self displacing accumulator system?

Back 32

The compensator spring forces the fluid from the compensator into the supply port of the pump.

Front 33

In the self displacing accumulator system, where is the relief valve located?

Back 33

Between the pressure and return line.

Front 34

What are the three basic parts of a filter assembly?

Back 34

The head, the element, and the bowl.

Front 35

Which part of the filter assembly is normally mounted to the aircraft?

Back 35

The head.

Front 36

What is meant by micron rating?

Back 36

The amount of dirt or contaminants it can filter.

Front 37

what are the two ways fluids can usually flow through a filter assembly?

Back 37

Normal flow and bypass flow.

Front 38

Where are hydraulic Fluid coolers normally located in a hydraulic system?

Back 38

In the return lines to cool the fluid as it flows back to the reservoir.

Front 39

Why is routing the hot hydraulic fluid lines through the fuel system advantageous?

Back 39

The heated fuel is more volatile and will burn more efficiently.

Front 40

h

Back 40

h