单项选择题
The （） engine is used for alternators and some times for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.
A.four-stroke
B.two-stroke
C.slow speed
D.reversible
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相关考题
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单项选择题
The （） of the main shaft should be measured with a （）.
A.clearance；calipers
B.sinking；bridge gauge
C.diameter；bridge gauge
D.clearance；lead wire -
单项选择题
Such an engine frame helps （） the engine and so protect the bearings from the deformation forces transmitted via the ships double bottom.
A.to stiffen
B.to soften
C.to loosen
D.to wear -
单项选择题
“Stand by engine” means （）.
A.prepare to stop the engine
B.assemble an engine on its bedplate
C.make an engine ready for starting
D.make an engine run steadily
