Refrigeration Review

Question 1

The area of greatest heat transfer in a refrigeration system is in the:

Answer 1

Condenser

Question 2

Heat is absorbed by the refrigerant in the:

Answer 2

Evaporator

Question 3

What type of evaporator system is commonly used in industrial applications because it has the advantage of being suitable for multiple temperature applications?

Answer 3

Liquid Overfeed

Question 4

True or False;
Semi-hermetic compressors are commonly used in ammonia systems because of their serviceability.

Answer 4

False
however, don’t think this is on the test.

Question 5

True or False;
A British Thermal Unit is the amount of heat needed to raise the temperature of one pound of water one degree centigrade.

Answer 5

False

pay attention to units

Question 6

Heat is removed from the refrigerant in the:

Answer 6

Condenser

Question 7

The refrigeration cycle is:

Answer 7

Compression, condensation, expansion, evaporation​

Question 8

Absolute zero is:

Answer 8

-459 º F

Question 9

The latent heat of vaporization is the amount of heat that must be added (without a change in temperature) to change states from:

Answer 9

liquid to vapor

Question 10

The standards for refrigeration are enforced by the:

Answer 10

Alberta Boilers Branch
ABSA

Question 11

What is often added into the vapor compression system to prevent liquid surges of refrigerant from entering the compressor?

Answer 11

low side receiver

Question 12

True or False;
Heat always flow from warm areas to cold areas

Answer 12

True

Question 13

The transfer of heat through a liquid is by:

Answer 13

Convection

Question 14

Transfer of heat through a solid is by:

Answer 14

Conduction

Question 15

Transfer of heat through a vacuum is by:​

Answer 15

Radiation

Question 16

The main purpose of the sight glass in a vapor compression refrigeration system is to:

Answer 16

check for vapor bubbles in the liquid line

Question 17

True or False;
The boiling point of a fluid will increase as the pressure on the fluid increases.

Answer 17

True

Question 18

The refrigerant temperature is highest after the:

Answer 18

compressor

Question 19

As the refrigerant passes through the expansion valve it starts to change from:

Answer 19

liquid to vapor by absorbing heat

Question 20

What would happen to the refrigerant inside the condenser if it was not working efficiently?

Answer 20

Some of the vapor would remain a vapor

Question 21

What part of the vapor compression refrigeration system will contain high pressure, high temperature liquid and gas?

Answer 21

condenser

Question 22

Refrigerant passing across the expansion valve will have a pressure __________ and a temperature ____________.

Answer 22

decrease / decrease

Question 23

Fins attached to the condenser coil are used to:

Answer 23

increase cooling of the refrigerant

Question 24

Cooling of an evaporative condenser is done with:

Answer 24

air and water

Question 25

What would happen to the refrigerant inside the evaporator if there were no heat available?

Answer 25

liquid would remain a liquid