SC Refrigeration Practice Questions - South Carolina Refrigeration Contractor Examination Exam

As refrigerant passes through a thermostatic expansion valve or other throttling device, which change occurs?

Pressure and temperature both drop, and a portion of the liquid flashes to vapor Pressure rises while temperature stays constant Enthalpy increases by the compressor work input The refrigerant becomes a subcooled liquid at condenser pressure

Correct Answer:

Pressure and temperature both drop, and a portion of the liquid flashes to vapor

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