The large, slow-speed, main propulsion diesel engine shown in the illustration, the part labeled 'B' contains __________. Illustration MO-0003
Official USCG Answer & Rule Citation
Correct Answer: Option D — water
Space 'B' on large slow-speed main propulsion diesel cylinder jackets or covers circulates treated fresh water to maintain optimal thermal stability, preventing localized overheating and destructive thermal stresses.
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