单项选择题
A thrust bearing is used with a propulsion diesel engine to （）.
A.control axial movement of the crankshaft B.transmit engine thrust to the propeller shaft C.absorb vibrations in the propeller shafting D.prevent propeller thrust from being transmitted to the hul
单项选择题 Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
单项选择题 Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
单项选择题 Diesel engine control can be obtained by the bridge （）.
