单选题When ship navigating in rough sea, the correct operation is ()Anavigating with a low diesel engine speedBnavigating with a stable diesel engine speedCincreasing the efficiency of propellerDincreasing fuel injection

单选题
When ship navigating in rough sea, the correct operation is ()
A

navigating with a low diesel engine speed

B

navigating with a stable diesel engine speed

C

increasing the efficiency of propeller

D

increasing fuel injection


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When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be______.A.disengaging the clutch firstly, then stopping the main engineB.stopping the main engine firstly, then disengaging the clutchC.stopping the cooling water pump firstly, then stopping the main engineD.stopping the main engine and disengaging the clutch at the same time

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