单项选择题

With（） the engine need not to be aligned with reduction gears or propeller shaft.

A.Diesel engine propulsion
B.Diesel electric propulsion
C.Steam engine propulsion
D.Gas turbine propulsion

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单项选择题

Typical marine propulsion plants include（） directly coupled to the vessel’s single large-diameter, fixed-pitch propeller.

A.a single, long-stroke, slow-speed, turbocharged, two-stroke diesel engine
B.a single, long-stroke, medium-speed, turbocharged, four-stroke diesel engine
C.two medium-speed, turbocharged, four-stroke diesel engines
D.a variable-speed AC generator

单项选择题

Propulsion of the vast majority of contemporary merchant ships (especially containerships and VLCCs) utilizes（） as prime mover.

A.gas turbine
B.diesel engine
C.steam engine
D.gasoline engine

单项选择题

（）are increasingly used as main engine on merchant vessels, because they have a high Hp/Weight ratio.

A.Slow speed diesel engines
B.Medium-speed diesel engines
C.Steam engines
D.Gasoline engines