单选题The Total Base Number (TBN) value of diesel engine lube oil refers to its ability to （）Aresist changes in viscosity with changes in temperatureBresist emulsificationCneutralize acidsDresist oxidation at high temperatures
单选题
The Total Base Number (TBN) value of diesel engine lube oil refers to its ability to （）
A
resist changes in viscosity with changes in temperature
B
resist emulsification
C
neutralize acids
D
resist oxidation at high temperatures
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单选题Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.Aexcessive crankcase pressureBexcessive lube oil temperatureCcontamination of the lube oil by waterDcontamination of the cooling water by lube oil
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单选题Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）Aincreasing the quantity of starting airBincreasing the lube oil pressureCheating the engine fuel supplyDheating the engine coolant
单选题Diesel engine fuel oil contamination often results in （）Agovernor malfunctionsBfuel injection system malfunctionsChigh cylinder lube oil temperaturesDlow intake temperatures
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单选题A sudden decrease in the diesel engine lube oil viscosity could be an indication of（）Aloss of additives from the lube oilBcarbon deposits in the lube oilCexcessive centrifugingDexcessive fuel dilution
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单选题Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?（）AWater discharging from the water outlet of the lube oil purifierBFuel oil discharging from the water outlet of the lube oil purifierCLube oil discharging from the water outlet of the lube oil purifierDA change in the lube oil viscosity
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单选题Lube oil in the fresh water cooling system of a diesel engine may result from a （）Acamshaft seizureBlube oil pump failureClube oil cooler failureDlube oil pump overflow
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