Engine General (Supplementary) USCG Question #330 (Set 5)

Which of the following statements is true concerning the valve shown in the illustration. GS-0047

USCG Exam Illustration GS-0047
USCG Examination Diagram: Illustration GS-0047
Official USCG Answer & Rule Citation

Correct Answer: Option D — The valve is a non-rising stem design.

A non-rising stem gate valve is identified by the stem remaining stationary as the handwheel turns, with the gate moving up or down inside the valve body. This design is space-efficient, making it ideal for tight machinery spaces where a rising stem would interfere with surrounding piping or equipment.

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