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单选题
Cylinder oil is a high viscosity mineral oil, with a （） machined to the anticipated sulfur content of the fuel.
A
TAN
B
TBN
C
SAN
D
SBN
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temperatureB
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floc pointC
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clogged fuel injection pumpsB
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单选题Heat damage to fuel injection nozzles on small high-speed diesel engines, can be prevented by（）A
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ensuring good metallic contact between nozzles and cylinder heads
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单选题A dirty diesel engine oil filter element can best be detected by （）.A
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the pressure drop across the filterC
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单选题The viscosity regulator controls the fuel oil temperature （） provide oil at the correct viscosity for combustion.A
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because ofC
in order toD
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Fuel oil viscosity will increasedD
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单选题Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.A
under high pressureB
under low pressureC
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单选题The tendency for lubricating oil to thin out at high temperatures and thicken at low temperatures will be characterized by a （）.A
low viscosity indexB
high viscosity indexC
high neutralization numberD
low demulsibility quality
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单选题A diesel engine exposed to widely varying ambient temperatures should use to a lubricating oil with （）A
a high viscosity indexB
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resist oxidation at high temperatures
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单选题Diesel engine lube oil diluted with fuel oil is indicated by（）A
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单选题Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?（）A
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单选题The viscosity regulator controls （） in order to provide oil at the correct viscosity for combustion.A
the engines speedB
the engines loadC
the fuel oil temperatureD
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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 temperatureB
resist emulsificationC
neutralize acidsD
resist oxidation at high temperatures
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单选题A condition that can increase the foaming tendency of lube oil is （）A
excessively high oil temperaturesB
water or moisture contaminationC
fuel dilutionD
life its cylinder relief vales
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increasing cooling water flowB
increasing lube oil flowC
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The oil oxidizes and forms carbon depositsB
The viscosity increasesC
Engine oil consumption decreasesD
Lubricating qualities of the oil are enhanced
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单选题Which of the following statements is correct regarding an oil with a high viscosity index?（）A
A large change of viscosity occurs with a minor change in temperatureB
No change in viscosity occurs with any change in temperatureC
Very little change in viscosity occurs with a significant change in temperatureD
The viscosity of the oil increases with an increase in temperature
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