If the discharge valve plates on a...

🔍 Key Concepts

• Refrigeration compressor cycle – what suction and discharge valves are supposed to do each stroke • Effect of leaking discharge valves on actual delivered pressure/volume vs piston movement • How a system’s pressure control or thermostat responds when the compressor isn’t pumping efficiently

💭 Think About

• Visualize one cylinder: on the upstroke, if the discharge valve leaks, what happens to the gas that was just compressed? Does it stay in the discharge line or leak back? • If the compressor is doing a lot of mechanical work but not actually moving much refrigerant, how will the system’s temperature and pressure respond over time? • Which of the listed symptoms matches a machine that is "pumping but not effectively" rather than one that is totally stopped or over-pressurizing quickly?

✅ Before You Answer

• Compare inefficient pumping vs no pumping at all – which options describe a completely stopped compressor? • Ask yourself whether leaking discharge valves would realistically create high discharge pressure or prevent high pressure from being reached. • Think about how the control that starts and stops the compressor (pressure or temperature control) would react if the system takes a very long time to reach the set condition.

If the discharge valve plates on a refrigeration compressor are leaking badly, in terms of the compresssor, what would be the operating symptom?

run continuously

not start

have high discharge pressure

short cycle on the high pressure switch

🔍 Key Concepts

💭 Think About

✅ Before You Answer