Engine Refrigeration (Supplementary) USCG Question #40 (Set 1)

Using the device shown in the illustration, which of the following statements is true when adding refrigerant as a vapor to the low side of the refrigeration system. GS-RA-01

USCG Exam Illustration GS-RA-01
USCG Examination Diagram: Illustration GS-RA-01
Official USCG Answer & Rule Citation

Correct Answer: Option A — The hose labeled "H" should be connected to the suction service valve service port, the hose labeled "J" should be connected to the vapor valve on the refrigerant cylinder and the valve labeled "G" should be open.

Proper manifold configuration for vapor charging requires connecting the service hose to the suction port, linking the cylinder vapor valve, and ensuring the manifold control valves are correctly positioned for vapor flow.

100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.