Refrigeration Review Flashcards
The area of greatest heat transfer in a refrigeration system is in the:
Condenser
Heat is absorbed by the refrigerant in the:
Evaporator
What type of evaporator system is commonly used in industrial applications because it has the advantage of being suitable for multiple temperature applications?
Liquid Overfeed
True or False;
Semi-hermetic compressors are commonly used in ammonia systems because of their serviceability.
False
however, don’t think this is on the test.
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.
False
pay attention to units
Heat is removed from the refrigerant in the:
Condenser
The refrigeration cycle is:
Compression, condensation, expansion, evaporation
Absolute zero is:
-459 º F
The latent heat of vaporization is the amount of heat that must be added (without a change in temperature) to change states from:
liquid to vapor
The standards for refrigeration are enforced by the:
Alberta Boilers Branch
ABSA
What is often added into the vapor compression system to prevent liquid surges of refrigerant from entering the compressor?
low side receiver
True or False;
Heat always flow from warm areas to cold areas
True
The transfer of heat through a liquid is by:
Convection
Transfer of heat through a solid is by:
Conduction
Transfer of heat through a vacuum is by:
Radiation
The main purpose of the sight glass in a vapor compression refrigeration system is to:
check for vapor bubbles in the liquid line
True or False;
The boiling point of a fluid will increase as the pressure on the fluid increases.
True
The refrigerant temperature is highest after the:
compressor
As the refrigerant passes through the expansion valve it starts to change from:
liquid to vapor by absorbing heat
What would happen to the refrigerant inside the condenser if it was not working efficiently?
Some of the vapor would remain a vapor
What part of the vapor compression refrigeration system will contain high pressure, high temperature liquid and gas?
condenser
Refrigerant passing across the expansion valve will have a pressure __________ and a temperature ____________.
decrease / decrease
Fins attached to the condenser coil are used to:
increase cooling of the refrigerant
Cooling of an evaporative condenser is done with:
air and water
What would happen to the refrigerant inside the evaporator if there were no heat available?
liquid would remain a liquid
