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单选题
In general, the oil mist defectors include a base plate with air blast pumpThe function of air blast pump is to （）crankcase.
A
supply clean air to the measuring compartment of the units for more accuracy
B
generaate the pressure required for the extraction of the oil mist from the
C
generate the pressure required for the extraction of the oil mist from the crankcase
D
supply clean air to the measuring track of the units for more accuracy
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______continuously extract the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity(不透明性) measuring track.A.The oil mist detectorsB.The smoke detectorsC.An oily water monitorD.Oil discharge monitoring and controlling system
考题
单选题In general, the oil mist defectors include a base plate with air blast pumpThe function of air blast pump is to （）crankcase.A
supply clean air to the measuring compartment of the units for more accuracyB
generaate the pressure required for the extraction of the oil mist from theC
generate the pressure required for the extraction of the oil mist from the crankcaseD
supply clean air to the measuring track of the units for more accuracy
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单选题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 ventB
unburned fuel vapors in the scavenge air receiverC
lube oil vapors in the crank caseD
lube oil vapors in the engine room
考题
单选题In general, the oil mist detectors include a built-in heating unit and a compact plug for electrical connectionThe function of heating unit is to （）A
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单选题Oil mist detectors are usually used on board to detect oil mist density within （）.A
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单选题The purpose of an oil mist detector in a main propulsion diesel engine is to warn of （）A
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单选题The most common cause of lowering the crankcase lube oil flash point is （）.A
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sufficient cooling of oil mist
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单选题Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.A
overspeed tripB
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reserve oil storage tank
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单选题The oil mist detectors continuously（） the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity measuring track.A
detractB
extractC
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pump down
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oilB
sea waterC
airD
fresh water
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单选题Shaker, circulation and spray are the three general methods used in（）A
pre-injection fuel oil treatmentB
lube oil filtrationC
lube oil purificationD
piston cooling
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