When used with reversing reduction gears, main propulsion diesel engines should be bolted tight to their foundations with fitted bolts at the output drive end and snug bolts with elongated bolt holes at the opposite end. This is done to __________.

Question

Accepted Answer

permit thermal expansion of the engine frame away from the driven equipment as the engine reaches operating temperature

Answer

maintain alignment when the ship's hull is working in heavy seas

Answer

ensure engine vibrations correspond to the natural frequency of the hull

Answer

maintain proper engine thrust bearing clearances

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