单项选择题
Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
A.fuel oil vapor at the sludge tank vent
B.unburned fuel vapors in the scavenge air receiver
C.lube oil vapors in the crank case
D.lube oil vapors in the engine room
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相关考题
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Clearance volume scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished （）.
A.during the valve overlap period
B.with only the exhaust valve open
C.at a pressure below atmospheric
D.without cooling the cylinders or pistons -
单项选择题
To prevent vibration damage to the fuel supply line of a diesel engine, you may use （）.
A.a short length of heavy duty clear plastic tubing
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