If a refrigeration system, equipped with a reciprocating compressor, has a liquid-line solenoid valve that is leaking during the 'off' cycle, what would this cause?

Correct Answer: Option C — noisy compressor operation upon starting

A leaking solenoid valve allows liquid refrigerant to migrate into the evaporator during the off-cycle. Upon compressor startup, this accumulated liquid is drawn into the cylinders. Because liquids are incompressible, this causes hydraulic shock, manifesting as loud knocking or noisy operation, which can lead to catastrophic valve or piston failure.