单项选择题
The vessel is out of harbor and in “Full Ahead”We are going to run fuel oil instead of （） and open the fuel oil heater steam valve.
A.heavy oil
B.lube oil
C.fuel oil
D.diesel
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The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.
A.shut
B.closing
C.opened
D.closed -
单项选择题
The term medium speed diesel engine is currently taken to mean an engine with an operating rotational speed of （） rpm.
A.below 300
B.above 1200
C.between 300 to 1200
D.below 1200 -
单项选择题
The term （） refers to one complete sequence of operations required to produce power in an engine.
A.diesel engine
B.stroke
C.cycle
D.compression ratio
