Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Hydraulics > Hydraulics > Flashcards

Hydraulics Flashcards

1
Q

What are the two types of actuators

A

Linear and rotary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the force trying to stop a body from moving

A

Resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

When dealing with energy what do you have to watch out for

A

The state or condition in which it was found

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is process to reduce friction between two moving parts

A

Lubrication

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the force that causes movement over a distance

A

Work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does SUS stand for

And what is it measuring

A

Saybolt universal seconds

Viscosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does a flow control valve work

A

Operates by resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does ASTM stand for

A

American society for testing materials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the resistance of molecules sliding/moving past eachother

A

Viscosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Common fluids used in a hydraulic system are:

A

Paraffinic and naphthalenic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The law of conservation states:

A

That energy can not be created nor destroyed although it may change from 1 form to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When a volume of fluid flows through tubing with a given amount of time

A

Flow rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

An actuator converts hydraulic working energy into:

A

Mechanical energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Varnish, lacquer and sludge are formed by:

A

High temperature oxidation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Presents of ____ in a hydraulic fluid can plug sensing orifices, cause moving parts to stick and wear excessively and act as a catalyst to oxidize oil.

A

Dirt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

A high pressure line with a pinhole leak spraying an oil mist into the air is:

A

Combustible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Fire resistant fluid that is close to petroleum oil is:

A

Synthetic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

If a pump is filled with liquid it is:

A

Primed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What component is designed to store fluid l, allow entrained air to escape and also dissipate heat?

A

Reservoir

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

At sea level one column of air, one sq inch weighs:

A

14.7 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

T or F

Cavitation destroys metal surfaces and interferes with viscosity

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

T or F

Hydropneumatic accumulators in industrial systems use nitrogen.

A

False

23
Q

T or F

Generation of heat by working energy traveling through a system to a point of work is system incompatibility

A

False

24
Q

T or F

Major causes of air entrainment is leakage past the piston seals.

A

False

25
Q

T or F

Pressure compensated past flow control vlvs are designed to meter pressure changes ahead or after orifice

A

True

26
Q

T or F

Main pump with pressure compensator causes pump discharge to reduce when pressure increases

A

True

27
Q

T or F

The sump strainer is on the return side

A

False

28
Q

T or F

A pressure filter is in the circuit between the pump and system components

A

True

29
Q

T or F

A flow control valve should be installed in the system to restrict fluid as it flows to the actuator

A

False

30
Q

T or F
The flow path through a normally closed pressure reducing valve is one when fluid exerts enough pressure to counteract vlv spring pressure

A

True

31
Q

T or F

In double acting single rod cylinder the extending stroke is faster than the return stroke

A

False

32
Q

Liquid enters and is forced out of pump by?

A

Generating an increase and decrease of volume out of housing

33
Q

The main function of hydraulic fluid is transferring power and:

A

Lubricating the internal surfaces of components

34
Q

Dirt comes in all shapes and sizes and can enter the hydraulic system by:

A

Dirt built into the system, generated within the system, and added to the system

35
Q

What is the most popular kind of piston pump

A

Axial piston pump

36
Q

In a vane pump, if there’s an unbalance with more pressure on one side it cause:

A

Excess stress on drive shaft and bearings

37
Q

Variable displacement pumps can vary output by?

A

Adjusting the squash plate, Cary position of cam ring and changing the size of fluid chambers

38
Q

What type of piston pump do the pistons in one half of the circle of rotation generate an increase in volume and in the other half of rotation the pistons generate a decrease in volume

A

Axial piston pump

39
Q

Which component is designed to store hydraulic fluid at system pressure and release when the system demand is higher then pump delivery.

A

Accumulator

40
Q

Cylinder pistons have 3 different kind of positive seals:

A

Lip seal, cast iron piston rings and single bidirectional element

41
Q

Why is entrained air a sealing problem with a hydraulic system

A

Pseudo cavitation

42
Q

In hydraulic motors the torque required to move the load is:

A

Breakaway torque

43
Q

What can cause the pump to not start and block fluid flow

A

Improperly maintained or sized sump strainer

44
Q

What vlv reduces pressure changes beyond the vlv

A

Normally open pressure reducing vlv

45
Q

A normally non passing control vlv which causes one operation before another is a:

A

Sequencing vlv

46
Q

2 common scales measuring pressure?

A

Psig and psia

47
Q

What type of pressure reducing vlv should prevent a cylinder from dropping a heavy load

A

Counterbalance vlv

48
Q

Which cylinder component prevents piston from slamming against end caps on end of each stroke €===3

A

Cushions

49
Q

A ____ type pump can be a variable displacement pump?

A

Piston

50
Q

2 classifications of positive displacement pumps

A

Variable or fixed

51
Q

Which directional control vlv is used for a single acting cylinder

A

2 position 3 way

52
Q

What are the 3 types of reservoirs

A

Overhead, L-shaped and conventional

53
Q

What directional control valve is used when controlling a 1 directional hydraulic motor on or off

A

2 way 3 position

54
Q

What control vlv is used for 1 direction with a pilot line

A

Pilot operated check vlv

Hydraulics (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions