A.remains the same
B.is reduced
C.is increased
D.is eliminated
第1题
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 hull
第2题
A.apparent slip
B.true slip
C.pitch
D.propulsive efficiency
第3题
A.worn or broken cylinder liner sealing rings
B.high cooling water temperature
C.worn or broken piston rings
D.low fuel oil pressure
第4题
A.the exhaust temperature
B.the speed of main engine
C.the turbine rotation speed
D.the power of main engine
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