单项选择题

All diesel engines are classified as（）.

A.four cycle
B.compression ignition
C.vacuum ignition
D.external combustion

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单项选择题

A VLCC (100，000 DWT+) with a 30，000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a（）.

A.bigger propeller
B.smaller power weight ratio
C.smaller propeller
D.larger power weight ratio

单项选择题

A towing vessel’s capability is BEST measured by horsepower，bollard pull，maneuverability and（）.

A.displacement
B.stability
C.towrope pull
D.propeller design

单项选择题

A thrust block is designed to（）.

A.absorb the shock of wave pressure at the bow
B.be placed between the engines and the foundation to absorb the vibration
C.transmit the thrust of the engine to the propeller
D.transmit the thrust of the propeller to the vessel