Question 40Refrigeration & AC - 1st Asst/Chief
70% to passIf a refrigeration system were short of refrigerant, besides an elevated box temperature, what would be an observable symptom?
Ashort-cycling of the compressor on the water failure switch
Bhigh suction pressure
Ccontinuous running of the compressor
Dhigh discharge pressure
AI Explanation
The correct answer is C) continuous running of the compressor. If a refrigeration system is short on refrigerant, the compressor will not be able to build up enough pressure to cycle off. This will result in the compressor running continuously in an attempt to reach the desired temperature, but without sufficient refrigerant the box temperature will remain elevated. The other options are incorrect because: A) a short-cycling compressor is more indicative of a problem with the water failure switch, not a refrigerant shortage; B) high suction pressure would be the opposite of what you would expect with a refrigerant shortage; and D) high discharge pressure is also not a symptom of a refrigerant shortage.
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