Hydraulic And Pneumatic Power Systems

Front 1

Hydraulic systems have many advantages including?

Back 1

Lighter-weight

easy to install

Simple to inspect

Minimum matience required

Front 2

Hydraulic systems are how efficent?

Back 2

100%

Front 3

Hydraulic fluid is considered to be?

Back 3

Inconpressible

Front 4

The pressure exerted by a column of liquid is determined by the?

Back 4

Height of the column

Front 5

Pascals law, the basic law for transmitting hydraulic power states that pressure in a closed system is transmitted _ and _ to _ parts of the system.

Back 5

Equally and undimished to all

Front 6

Force per unit area is measure of?

Back 6

Pressure

Front 7

The realshionship between, force,area, and pressure may be expressed using the formula

Back 7

Force equals area times pressure

Front 8

In a hydraulic system the relashionship between the area of the pistion , the distance it moves, and the volume of tue fluid displaced may be expressed using the formula?

Back 8

Velocity equals area times distance .

Front 9

Two major advantages of a hydraulic system over mechanical systems?

Back 9

1. Ease of which can be applied to a large area.

2.large gain of mechanical advantage made possible by varying the volume of the container.

Front 10

A good hydraulic fluid must posses what properties?

Back 10

Flow with minimum opposition

Be incomprehensible

Have good lubrication properties

Inhibit corrosion, and nit chemically attack any seals used

Not foam in operation

Front 11

What is the internal resistance of the flow of the liquid?

Back 11

Viscosity

Front 12

What is the temperature at which liquid will give off vapor in sufficient quanity to ignite momentarly.

Back 12

Flash point

Front 13

3 types of hydraulic fluid currently used in civilian aircraft

Back 13

Patroleum, phosphat, and vegetable

Front 14

Is it possible to mix different hydraulic fluid

Back 14

No

Front 15

Vegetable base hydraulic fluid is?

Back 15

Caster oil and alchohol

Front 16

Vegetable base hydraulic fluid is dyed what color

Back 16

Color

Front 17

Most widely used hydraulic fluid in general aircraft is

Back 17

Mil h 5056

Front 18

What type of hydraulic fluid is dyed red

Back 18

Mil h 5056

Front 19

Synthetic hydraulic fluids were developed in to provide what type of resistence use in high performancepiston, and turbine engine

Back 19

Fire

Front 20

Skydrol is what color

Back 20

Ligh purple

Front 21

If skydrol is spilled clean with what

Back 21

Soap and water

Front 22

Name fluid used to flush out hydraulic systems

Vegetable base

Mineral base

Synthetic

Back 22

Alcohol

Stoddard solvent

Trichlorethylene

Front 23

Material used for seals in hydraulic systems using

Vegetable

Mineral

Synthetic

Back 23

Natural rubber

Neoplane

Butyle rubber

Front 24

All modern airplanes use a simple hydraulic system to operate?

Back 24

brakes

Front 25

Hydraulic systems must contain what basic types of units/

Back 25

suitable fluid, fluid reservoir, pump ,and actuators

Front 26

Single unit containing an electrical driven hydraulic pump, reservoir, control valve and many of the auxiliary valves is known as a hydraulic

Back 26

power pack

Front 27

Two types of hydraulic reservoirs are ?

Back 27

integral and in line

Front 28

Aircraft that operate in the lower altitudes normally use what type of hydraulic reservoirs.

Back 28

unpressurized

Front 29

three ways of pressurizing the system

Back 29

aspirator in return line ,bleed air, piston type

Front 30

one micron equals

Back 30

0.000039

Front 31

Pleated paper micronic filters are usually installed in the hydraulic system

Back 31

return line

Front 32

Cuno filters can be used on the pressure side of the hydraulic system.

Back 32

can

Front 33

_ action pumps are the most common type of hand pump.

Back 33

double

Front 34

A _ displacement pump moves a specific volume of fluid.

Back 34

constant

Front 35

An _ valve of some sorts is needed when a constant displacement pump is used.

Back 35

relief

Front 36

A hydraulic system using a variable displacement pump _ require an unloading valve.

Back 36

does not

Front 37

A selector valve is one of the most common types of _ control valves `

Back 37

flow

Front 38

The _ center valve directs fluid throught the center of the valve back to the reservoir when a unit is not being actuated.

Back 38

open

Front 39

A valve that allows free flow of fluid in one direction, but no flow in the opposite direction is called/

Back 39

check

Front 40

A valve that allows free flow of fluid in one direction but a restricted flow in the opposite direction is called

Back 40

orifice check valve

Front 41

A valve that requires one component to fully acuate before another can actuate is called an

Back 41

sequence

Front 42

_ Valves are similar to sequence valves except they are opened by hydraulic pressure rather than mechanical contact

Back 42

priority

Front 43

An _ may be installed when it is necesssary to operate some portion of a hydraulic system at a pressure lower than the normal system pressure.

Back 43

hydraulic fuse

Front 44

Two principles upon which a hydraulic fuse may operate are?

Back 44

pressure drop across fuse, and volume of liquid passing throught the fuse

Front 45

What is the simplest type of control valve

Back 45

relief

Front 46

what us a simple device designed to store hydraulic fluid under pressure.

Back 46

accumalator

Front 47

an accumalator is filled with

Back 47

air and nitrogen

Front 48

3 types of accumulators

Back 48

pistion bladder, and diaphram