【单选题】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.
disengagine the clutch firstly, then stopping the main engine
B.
stopping the main engine firstly, then disengaging the clutch
C.
stopping the cooling water pump firstly, then stopping the main engine
D.
stopping the main engine and disengaging the clutch at the same time
【单选题】To prevent damage to the ______ when the engine starts, the pinion gear incorporates a one-way clutch which is splined to the starter armature shaft.