Refrigeration

Question 1

Rankine =

Answer 1

Farenheit + 460

Question 2

Kelvin =

Answer 2

Celsius + 273

Question 3

Temperature can be thought of as

Answer 3

A description of the level of heat

Question 4

Water boils at

Answer 4

100 C, 212 F

Question 5

Water boils at 212 F under which psi

Answer 5

14.696

Question 6

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

Answer 6

travel faster

Question 7

Celsius to Fahrenheit equation

Answer 7

X times 1.8 + 32

Question 8

Fahrenheit to Celsius equation

Answer 8

X - 32 / 1.8

Question 9

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

Answer 9

Specific heat

Question 10

Atmospheric pressure at sea level

Answer 10

29.92” Hg

Question 11

A bourdon tube is often found in a

Answer 11

Pressure gauge

Question 12

A solid material exerts pressure or force

Answer 12

Downward only

Question 13

A liquid material exerts pressure or force

Answer 13

Outward and downward

Question 14

A vapour material exerts pressure

Answer 14

In all directions

Question 15

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

Answer 15

Go down

Question 16

Boyles Law

Answer 16

Volume and pressure relationship

Question 17

Charles Law

Answer 17

Volume and temperature relationship

Question 18

Daltons Law

Answer 18

Mixture of gases and pressure relationship

Question 19

Unit for electrical power

Answer 19

Watts

Question 20

One watt = How many btu

Answer 20

3.413

Question 21

What happens to ice in a drink

Answer 21

Melts from heat absorption

Question 22

Temperature inside of a fridge

Answer 22

35 Degrees F

Question 23

Refrigeration is

Answer 23

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

Question 24

A ton of refrigeration is equal to

Answer 24

288,000 Btu/24-hr

Question 25

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

Answer 25

Condensor and Evaporator

Question 26

Evaporator is used to

Answer 26

Absorb heat for the product to be cooled

Question 27

Reciprocating compressors have a

Answer 27

Piston and cylinder

Question 28

Condenser is used to

Answer 28

Reject heat from the refrigerant

Question 29

The compressor is used to

Answer 29

Pump refrigerant throughout the system

Question 30

Which refrigerant has no chlorine in it

Answer 30

R-134A

Question 31

Oil in a refrigeration system containing an HFC

Answer 31

POE

Question 32

Refrigerants near azeorope or zeatrope are

Answer 32

HFCs

Question 33

Term for desirable behaviour of oil and refrigerant is

Answer 33

Miscibility

Question 34

Best method of leak checking is

Answer 34

Nitrogen 150 Psig

Question 35

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

Answer 35

Acid

Question 36

Noncondensable gases are

Answer 36

Undesirable in a refrigeration system

Question 37

To pull a vacuum means

Answer 37

Lower the pressure in a system below atmospheric

Question 38

A micron gauge is used to measure

Answer 38

Absolute pressures below 1 mm hg

Question 39

Deep vaccum is how many microns

Answer 39

500-250

Question 40

Multiple evacuation means

Answer 40

Pull a vacuum multiple times

Question 41

Connecting line material for most accurate testing is

Answer 41

Copper tube

Question 41

Refrigerant in vapour form must enter through the

Answer 41

Suction line

Question 41

When charging a system with vapour refrigerant, the cylinder becomes

Answer 41

Cold

Question 42

Refrigerant in liquid form enters through the

Answer 42

Liquid line

Question 43

How is a cylinder placed when charging a system

Answer 43

Upside down

Question 44

If a system is overcharged, what happens

Answer 44

Increased operating pressures

Question 45

Fractionation/glide occurs when

Answer 45

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

Question 46

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

Answer 46

Charge as a liquid through the low side with a restriction

Question 47

Change of state from solid to vapour

Answer 47

Sublimation

Question 48

Which component can suffer from internal ice accumulation?

Answer 48

Metering device

Question 49

The oil in a vacuum pump should be changed...

Answer 49

After every use

Question 50

Maximum pressure for leak testing with nitrogen

Answer 50

150 psig

Question 51

Air left in a system can lead to

Answer 51

Compressor failure