Free ASHRAE Refrigeration Principles and Applications Questions and Answers

Question 1

What is the primary function of a refrigeration system?

Accepted Answer

Remove heat to lower temperature.

Answer

Increase air pressure within a space.

Answer

Enhance humidity levels.

Answer

Reduce air circulation.

Question 2

Which component in a refrigeration system is responsible for compressing the refrigerant gas?

Accepted Answer

Compressor

Answer

Evaporator

Answer

Expansion valve

Answer

Filter dryer

Question 3

What happens to the refrigerant as it passes through the expansion valve?

Accepted Answer

Its pressure and temperature decrease.

Answer

Its temperature and pressure increase.

Answer

It turns into a liquid completely.

Answer

It exits as high-pressure gas.

Question 4

Which factor is most important when selecting a refrigerant for an HVAC system?

Accepted Answer

Environmental impact and efficiency.

Answer

Color of the refrigerant.

Answer

Odor characteristics.

Answer

Density of the refrigerant.

Question 5

What role does the evaporator play in the refrigeration cycle?

Accepted Answer

Absorbs heat and cools the space.

Answer

Compresses the refrigerant gas.

Answer

Condenses the refrigerant vapor.

Answer

Reduces airflow resistance.

Question 6

Why is it important to prevent refrigerant leaks in a cooling system?

Accepted Answer

Leaks reduce efficiency and harm the environment.

Answer

Leaks increase the speed of airflow.

Answer

Leaking refrigerant improves compressor performance.

Answer

Leaks have no impact on cooling performance.