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← TechnologyWhich outcome results within a positive displacement refrigerant pump when the discharge valve fails to open during operation?
A)Rapid overheating of the pump motor
B)Strained cavitation within the pump cylinders
C)Excessive internal pressure buildup damaging components✓
D)Reduced volumetric efficiency due to backflow
💡 Explanation
When the discharge valve is closed, the pump continues to displace fluid, causing rapid internal pressure buildup because the confined refrigerant has nowhere to exit. Therefore, component damage results from pressure, rather than motor overheating, cavitation, or backflow, each requiring different causes.
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