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单选题
Fuel oil having a low cetane rating could result in（）
A
improved cold weather starting
B
excessive fuel oil consumption
C
reduced ignition lag
D
smoother engine operation
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air bubbles in the fuel oil systemD
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worn or broken cylinder liner sealing ringsB
high cooling water temperatureC
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单选题Which of the following statements is true concerning the cetane number of diesel fuel?（）A
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单选题Which of the following statements is true concerning the cetane number rating of diesel fuel? （）A
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increase in fuel economyC
reduction in lube oil viscosityD
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单选题The longer the ignition delay period resulting from improper use of low cetane fuel, the （）A
less fuel will enter the cylinderB
higher the cylinder combustion temperatureC
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单选题Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）A
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increased feed water consumptionC
fuel pump failureD
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单选题Surface irregularities, such as erosion and pitting on injection pump plungers, will（）A
increase ignition delayB
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affect engine performance at low speedD
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单选题Which of the following represents the significance the fuel oil cetane number?（）A
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The cetane number is of little significance in the combustion
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单选题The cetane rating of diesel fuel is an indication of the （）A
ignition quality of the fuelB
calorific value of the fuelC
flash point of the fuelD
rate of fuel consumption
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