Question 138Refrigeration & AC - QMED

70% to pass

For most multi-box refrigeration systems, the refrigerant sight glass would be located where in the system?

Aafter the receiver in the liquid line
Bafter the condenser in the drain line to the receiver
Cafter the compressor in the discharge line
Dbefore the compressor in the suction line
AI Explanation

The correct answer is A) after the receiver in the liquid line. The refrigerant sight glass is typically located in the liquid line after the receiver because this is the best location to observe the state of the refrigerant. The receiver is where the liquid refrigerant collects, so placing the sight glass here allows you to see if the refrigerant is fully condensed and free of bubbles, which indicates proper system operation. The other options are incorrect because the sight glass would not be located in the discharge line (C), the suction line (D), or the drain line to the receiver (B), as these are not the optimal locations to observe the refrigerant state.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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