Which component is commonly observed through a sight glass to verify liquid refrigerant level?

Which component is commonly observed through a sight glass to verify liquid refrigerant level?

• A. Water boxes
• B. Receiver
• C. Sight glass
• D. Accumulator

Answer: (B)

The receiver (receiver-drier) is the component whose liquid level is checked with a sight glass. After the condenser, liquid refrigerant collects in the receiver, and the sight glass in the liquid line lets you visually confirm there’s enough liquid inside. A steady column of clear liquid indicates a proper charge, while visible gas, foaming, or a lack of liquid suggests an undercharge or other issue. Other options aren’t involved in verifying the liquid level: water boxes aren’t used for refrigerant charge verification, and while an accumulator stores refrigerant, it isn’t read through a sight glass for level checks.

The receiver (receiver-drier) is the component whose liquid level is checked with a sight glass. After the condenser, liquid refrigerant collects in the receiver, and the sight glass in the liquid line lets you visually confirm there’s enough liquid inside. A steady column of clear liquid indicates a proper charge, while visible gas, foaming, or a lack of liquid suggests an undercharge or other issue. Other options aren’t involved in verifying the liquid level: water boxes aren’t used for refrigerant charge verification, and while an accumulator stores refrigerant, it isn’t read through a sight glass for level checks.