Refrigeration Cycle Quiz: Test Your HVAC Knowledge

Question 1

Which of the following is the first step in the refrigeration cycle?

Accepted Answer

Compression

Answer

Condensation

Answer

Evaporation

Answer

Expansion

Question 2

During compression, the refrigerant gas is:

Accepted Answer

Increased in pressure and temperature

Answer

Cooled and expanded

Answer

Evaporated and turned into a gas

Answer

Condensed and liquefied

Question 3

Condensation occurs when the compressed refrigerant gas is:

Accepted Answer

Cooled and liquefied

Answer

Heated and expanded

Answer

Mixed with a lubricant

Question 4

The expansion valve allows the high-pressure liquid refrigerant to:

Accepted Answer

Expand and turn into a gas

Answer

Increase in temperature and pressure

Answer

Flow smoothly through the system

Answer

Condense and liquefy

Question 5

During evaporation, the refrigerant gas:

Accepted Answer

Absorbs heat from the surroundings

Answer

Becomes highly flammable

Answer

Releases heat into the surroundings

Answer

Changes its chemical composition

Question 6

Which component in the refrigeration cycle is responsible for removing heat from the refrigerant gas during condensation?

Accepted Answer

Condenser coil

Answer

Expansion valve

Answer

Compressor

Answer

Evaporator coil

Question 7

The temperature-pressure relationship of the refrigerant is:

Accepted Answer

Inversely proportional

Answer

Logarithmic

Answer

Directly proportional

Answer

Unrelated

Question 8

Which of the following is NOT a common type of refrigerant used in refrigeration systems?

Accepted Answer

R-134a

Answer

R-404A

Answer

R-302

Answer

R-22

Question 9

The superheat of a refrigerant is:

Accepted Answer

The difference between the actual temperature and the saturation temperature

Answer

The pressure at which the refrigerant condenses

Answer

The amount of heat added to the refrigerant

Question 10

Which of the following is a potential cause of a loss of refrigerant in a refrigeration system?

Accepted Answer

Leak in the evaporator coil

Answer

Overcharging the system

Answer

Clogged expansion valve

Answer

Dirty condenser coil