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Engine: Motor Plants and Auxiliary Boilers

Question 1,943 of 1,433

The pneumatic propulsion control system used on the fishing vessel to which you are assigned uses a diaphragm-operated relay valve as shown in the illustration. Periodically, the valve is to be disassembled for cleaning and inspection. What statement best describes the proper method for lubrication upon reassembly?

USCG illustration MO-0052 for Engine Motor Plants and Auxiliary Boilers question 1943
Illustration MO-0052
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Appears on the 2026 sample exam for

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