Question 201Motor Plants - 1st Asst/Chief

70% to pass

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

Diagram for USCG Motor Plants Chief: The starter control valve in the hydraulic system shown in the illustration is ...
Adrain the reservoir
Bremove all plugs from the system
Cbleed off all accumulator pressure in "E"
Densure that the accumulator piston is in the charged position
AI Explanation

The correct answer is C) bleed off all accumulator pressure in "E". The reasoning for this is that before servicing or removing a component in a hydraulic system, it is essential to relieve any residual pressure in the system. In this case, the starter control valve is malfunctioning, and bleeding off the accumulator pressure is a necessary step before removing the valve. This is to prevent any sudden release of pressurized fluid, which could be hazardous. The other options are incorrect because draining the reservoir (A) or removing all plugs (B) are not necessary steps before servicing the starter control valve. Ensuring the accumulator piston is in the charged position (D) is also not relevant to the task at hand, which is to safely remove the malfunctioning valve.

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

Get the App