Motor Plants & Auxiliary Boilers USCG Question #1516 (Set 32)

The starter control valve in the hydraulic system shown in the illustration is malfunctioning. Before removing the valve, you must first __________. Illustration MO-0049

USCG Exam Illustration MO-0049
USCG Examination Diagram: Illustration MO-0049
Official USCG Answer & Rule Citation

Correct Answer: Option C — bleed off all accumulator pressure in "E"

Hydraulic systems store high energy under pressure. Before breaking any connection or servicing valves on an accumulator circuit, stored hydraulic pressure must be completely bled off to prevent severe personnel injury.

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