Brainscape's Knowledge GenomeTM

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


See full index

Electrical > Refrigeration > Flashcards

Refrigeration Flashcards

1
Q

Rankine =

A

Farenheit + 460

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

Kelvin =

A

Celsius + 273

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

Temperature can be thought of as

A

A description of the level of heat

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

Water boils at

A

100 C, 212 F

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

Water boils at 212 F under which psi

A

14.696

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

As the temperature of a material increases, the molecules in the material

A

travel faster

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

Celsius to Fahrenheit equation

A

X times 1.8 + 32

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

Fahrenheit to Celsius equation

A

X - 32 / 1.8

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

The amount of heat required to change the temperature of a substance varies with the substance, which is…

A

Specific heat

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

Atmospheric pressure at sea level

A

29.92” Hg

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

A bourdon tube is often found in a

A

Pressure gauge

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

A solid material exerts pressure or force

A

Downward only

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

A liquid material exerts pressure or force

A

Outward and downward

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

A vapour material exerts pressure

A

In all directions

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

If the temperature remains constant and the volume that a gas occupies increases, the pressure will

A

Go down

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

Boyles Law

A

Volume and pressure relationship

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

Charles Law

A

Volume and temperature relationship

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

Daltons Law

A

Mixture of gases and pressure relationship

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

Unit for electrical power

A

Watts

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

One watt = How many btu

A

3.413

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

What happens to ice in a drink

A

Melts from heat absorption

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

Temperature inside of a fridge

A

35 Degrees F

23
Q

Refrigeration is

A

The process of removing heat from a place where it is not wanted to a place where it makes little to no difference

24
Q

A ton of refrigeration is equal to

A

288,000 Btu/24-hr

25
Q

What parts of the refrigeration cycle change the vapour to a liquid and liquid back into a vapour

A

Condensor and Evaporator

26
Q

Evaporator is used to

A

Absorb heat for the product to be cooled

27
Q

Reciprocating compressors have a

A

Piston and cylinder

28
Q

Condenser is used to

A

Reject heat from the refrigerant

29
Q

The compressor is used to

A

Pump refrigerant throughout the system

30
Q

Which refrigerant has no chlorine in it

A

R-134A

31
Q

Oil in a refrigeration system containing an HFC

A

POE

32
Q

Refrigerants near azeorope or zeatrope are

A

HFCs

33
Q

Term for desirable behaviour of oil and refrigerant is

A

Miscibility

34
Q

Best method of leak checking is

A

Nitrogen 150 Psig

35
Q

When moisture is present in a refrigeration system, it will react with the refrigerant and oil to form

A

Acid

36
Q

Noncondensable gases are

A

Undesirable in a refrigeration system

37
Q

To pull a vacuum means

A

Lower the pressure in a system below atmospheric

38
Q

A micron gauge is used to measure

A

Absolute pressures below 1 mm hg

39
Q

Deep vaccum is how many microns

A

500-250

40
Q

Multiple evacuation means

A

Pull a vacuum multiple times

41
Q

Connecting line material for most accurate testing is

A

Copper tube

41
Q

Refrigerant in vapour form must enter through the

A

Suction line

41
Q

When charging a system with vapour refrigerant, the cylinder becomes

A

Cold

42
Q

Refrigerant in liquid form enters through the

A

Liquid line

43
Q

How is a cylinder placed when charging a system

A

Upside down

44
Q

If a system is overcharged, what happens

A

Increased operating pressures

45
Q

Fractionation/glide occurs when

A

Some of a blended refrigerant evaporates or condenses before the rest of the blend

46
Q

When charging or running a system with 410A, what must be done to prevent liquid from entering the system

A

Charge as a liquid through the low side with a restriction

47
Q

Change of state from solid to vapour

A

Sublimation

48
Q

Which component can suffer from internal ice accumulation?

A

Metering device

49
Q

The oil in a vacuum pump should be changed…

A

After every use

50
Q

Maximum pressure for leak testing with nitrogen

A

150 psig

51
Q

Air left in a system can lead to

A

Compressor failure

52
Q
A

Electrical (2 decks)

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