The compressor used in a water-cooled air conditioning system is short cycling. A service check determines that the suction pressure remains above the normal cut-in point during cycling and that the discharge pressure rapidly builds up to the cut-out point while running and gradually falls to the cut-in point during the off cycle. What is likely the cause?

Correct Answer: Option B — reduction in condenser water flow (scaled condenser)

Scaled condenser tubes restrict heat transfer, causing high discharge pressures that trigger the high-pressure cutout. As the compressor stops, the pressure slowly equalizes, allowing the system to restart. This cycle repeats because the heat rejection capacity is insufficient to maintain steady-state operation under normal load conditions.