Which component increases pressure and temperature to improve cooling?

• A. Pump
• B. Compressor
• C. Fan
• D. Turbine

Answer: (B)

Raising the refrigerant’s pressure and temperature is achieved through compression, which is essential for moving heat in a cooling cycle. The compressor does work on the refrigerant, producing high-pressure, high-temperature gas that then releases heat in the condenser to outside air and becomes a high-pressure liquid before expanding to absorb heat again in the evaporator. A pump would only increase pressure in liquids and doesn’t provide the gas-phase compression the cycle needs; a fan helps transfer heat by moving air but doesn’t change the refrigerant’s pressure; a turbine expands gas, lowering its pressure and temperature. So, the component that increases pressure and temperature to drive cooling is the compressor.