What are the two types of A/C compressors?

What are the two types of A/C compressors?

• A. Positive displacement and Negative displacement
• B. Fixed displacement and Variable displacement
• C. Single stage and Two stage
• D. Rotary and Piston

Answer: (B)

Displacement describes how much refrigerant a compressor moves with each cycle. Compressors can be categorized by whether that displacement is fixed or can vary to match the cooling load. A fixed displacement compressor delivers roughly the same amount of refrigerant per cycle at a given speed, so its capacity is kept constant and other methods (like cycling or bypass) control overall output. A variable displacement compressor, on the other hand, can change the amount moved per cycle, adjusting to the cooling demand and often improving efficiency at part load. This focus on how the compressor’s volume per stroke is controlled is why the two correct types are fixed displacement and variable displacement. The other options refer to stage count, general design, or an incorrect pairing, which aren’t about how displacement is controlled.

Displacement describes how much refrigerant a compressor moves with each cycle. Compressors can be categorized by whether that displacement is fixed or can vary to match the cooling load. A fixed displacement compressor delivers roughly the same amount of refrigerant per cycle at a given speed, so its capacity is kept constant and other methods (like cycling or bypass) control overall output. A variable displacement compressor, on the other hand, can change the amount moved per cycle, adjusting to the cooling demand and often improving efficiency at part load. This focus on how the compressor’s volume per stroke is controlled is why the two correct types are fixed displacement and variable displacement. The other options refer to stage count, general design, or an incorrect pairing, which aren’t about how displacement is controlled.