Question 163Refrigeration & AC - Assistant Engineer
70% to passIn an air conditioning system, low discharge head pressure associated with a reciprocating compressor can be the result of what condition?
Ainsufficient cooling water to the condenser
Bair in the evaporator coils
Cleaky suction valves
Dair in the condenser
AI Explanation
The correct answer is C) leaky suction valves. In a reciprocating compressor air conditioning system, low discharge head pressure can be caused by leaky suction valves. Leaky suction valves allow refrigerant to flow back from the discharge side to the suction side, reducing the overall compression and discharge pressure of the system. The other answer choices are incorrect because: A) insufficient cooling water to the condenser would cause high discharge pressure, not low; B) air in the evaporator coils would cause low suction pressure, not low discharge pressure; and D) air in the condenser would also cause high discharge pressure, not low.
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