Engine Refrigeration (Supplementary) USCG Question #345 (Set 6)

Which of the following statements is true concerning the illustrated gauge manifold set? GS-RA-01

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

Correct Answer: Option D — Closing the valve labeled "G" isolates the hose labeled "H" from the hose labeled "J".

On a standard four-valve or two-valve manifold set, closing the low-side manifold hand valve physically blocks fluid communication between the center utility charging hose and the low-side service hose connected to the system.

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