HVAC Refrigeration Fundamentals 2

Question 1

What is the function of the condenser in a refrigeration system?

Accepted Answer

Absorb heat from the refrigerant and reject it to the outside air

Answer

The condenser removes heat from the high-pressure refrigerant vapor and rejects it to the outdoor environment, causing the refrigerant to condense into liquid.

Question 2

What does a filter-drier do in a refrigeration system?

Accepted Answer

Removes moisture and contaminants from the refrigerant

Answer

A filter-drier removes moisture, acids, and debris from the refrigerant to protect system components from corrosion and blockage.

Question 3

Which refrigerant is classified as an A2L (mildly flammable) refrigerant?

Accepted Answer

R-32

Answer

R-32 is classified as an A2L refrigerant, meaning it has low toxicity but is mildly flammable, requiring special handling precautions.

Question 4

What tool is used to measure both high-side and low-side pressures in a refrigeration system?

Accepted Answer

Manifold gauge set

Answer

A manifold gauge set connects to the high-side and low-side service ports to simultaneously read system pressures.

Question 5

What is the purpose of a sight glass in a refrigeration system?

Accepted Answer

To observe refrigerant flow and detect moisture or bubbles in the liquid line

Answer

A sight glass allows technicians to observe the refrigerant stream in the liquid line and detect bubbles (indicating low charge) or moisture (via color indicator).

HVAC - Heating, Ventilation, and Air Conditioning Practice Test

HVAC - Heating, Ventilation, and Air Conditioning Practice Test

HVAC Refrigeration Fundamentals 2