Engine General (Supplementary) USCG Question #343 (Set 5)

Which of the illustrations depicts the correct procedure for applying pipe dope? GS-0046

USCG Exam Illustration GS-0046
USCG Examination Diagram: Illustration GS-0046
Official USCG Answer & Rule Citation

Correct Answer: Option C — B

Proper application of pipe dope requires coating only the male threads, leaving the first one or two threads bare to prevent sealant from entering the piping system. This practice ensures a pressure-tight seal while avoiding contamination of downstream components, valves, or instrumentation, adhering to standard marine piping installation best practices.

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