Refrigeration Fundamentals Flashcards
6 cards from real HVAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Refrigeration Fundamentals flashcards as text
What is the function of the condenser in a refrigeration system?
Answer: Absorb heat from the refrigerant and reject it to the outside air
The condenser removes heat from the high-pressure refrigerant vapor and rejects it to the outdoor environment, causing the refrigerant to condense into liquid.
What does a filter-drier do in a refrigeration system?
Answer: Removes moisture and contaminants from the refrigerant
A filter-drier removes moisture, acids, and debris from the refrigerant to protect system components from corrosion and blockage.
Which refrigerant is classified as an A2L (mildly flammable) refrigerant?
Answer: R-32
R-32 is classified as an A2L refrigerant, meaning it has low toxicity but is mildly flammable, requiring special handling precautions.
What tool is used to measure both high-side and low-side pressures in a refrigeration system?
Answer: Manifold gauge set
A manifold gauge set connects to the high-side and low-side service ports to simultaneously read system pressures.
What is the purpose of a sight glass in a refrigeration system?
Answer: To observe refrigerant flow and detect moisture or bubbles in the liquid line
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).
In a standard vapor-compression cycle, what state is the refrigerant as it enters the evaporator?
Answer: Low-pressure liquid/vapor mixture
After passing through the metering device, the refrigerant enters the evaporator as a low-pressure mixture of liquid and vapor.