Motor Plants & Auxiliary Boilers USCG Question #646 (Set 15)

Surface irregularities, such as erosion and pitting on injection pump plungers, will __________.

Official USCG Answer & Rule Citation

Correct Answer: Option B — affect fuel oil metering

Surface erosion and pitting on injection pump plungers allow high-pressure fuel to slip past the sealing surfaces, altering the effective stroke and adversely affecting fuel oil metering.

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