Ⅰ only
Ⅱ only
either Ⅰ or Ⅱ
neither Ⅰ or Ⅱ
199 During extremely cold weather, while starting an engine,it turns too slowly and fails to start.This problem is most likely theresult of()A.high fuel oil viscosityB.low fuel oil temperatureC.high lube oil viscosityD.energized alow plugs
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If a used lube oil analysis indicates excessive chromate content, this meansA.air filtration is inadequateB.engine coolant is leaking into the lube oilC.fuel oil is leaking into the lube oilD.the piston rings are excessive worn
When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.A.increase the fuel oil temperatureB.decrease the fuel oil temperatureC.decrease the fuel oil supply pressureD.increase the air supply
单选题A decrease in the flash point of diesel engine lube oil indicates the lube oil has become （）.A contaminated with sludgeB contaminated with carbonC diluted with fuel oilD diluted with water
单选题When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）A cold fuel oilB low fuel oil pressureC low atomizing steam pressureD water in the fuel oil
单选题A lube oil filter can be used to remove most contaminants from lube oilA contaminant which will remain in the lube oil after filtering is （）.A acidB fuel oilC sedimentD water
单选题Which of the listed conditions can cause a diesel engine to use too much lube oil?（）A Dirty lube oil filterB Too much piston ring wearC High lube oil viscosityD Low lube oil temperature
