Question 28Refrigeration & AC - QMED
70% to passWhen checking the oil level in a refrigeration compressor, under what conditions would the most accurate reading be obtained?
Aimmediately after start-up
Bafter being shut down for 3 hours with the crankcase heater secured
Cseveral minutes after shutdown following a prolonged period of operation
Dimmediately after adding oil
AI Explanation
The correct answer is C) several minutes after shutdown following a prolonged period of operation. The most accurate oil level reading for a refrigeration compressor will be obtained after the compressor has been shut down for several minutes following a prolonged period of operation. This is because the oil will have had time to fully drain back into the crankcase, providing a true indication of the oil level. Options A and B are incorrect because the oil level will not have stabilized immediately after start-up or after a 3-hour shutdown. Option D is incorrect because adding oil will obviously affect the reading and not provide an accurate baseline.
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