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单选题
Maintaining the proper fuel oil temperature will result in （）
A
the elimination of valve wear
B
improved atomization
C
a decrease in cylinder blow-by
D
an increase in cylinder blow-by
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in order thatB
because ofC
in order toD
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improved cold weather startingB
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fuel knockB
increased powerC
low compression pressureD
high exhaust temperature
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单选题As its temperature rises, the volume of fuel oil in the tanks will （）.A
remain the sameB
increaseC
decreaseD
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单选题The ash content of a fuel oil is significant to the operating engineer because it （）A
is an indication of the amount of noncombustible material present in the oilB
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is useful for determining proper atomization temperaturesD
reflects the overall thermal efficiency of the fuel oil service system
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单选题Crankcase explosions in propulsion diesel result from（）A
the splashing of lubrication oil by the crankshaftB
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broken fuel lines spraying oil on the crankcaseD
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单选题Proper filtering and straining of diesel fuel is important because the（）A
fuel oil pump will over-speed if dirt is not removedB
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fuel will clog the intake air filter
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increase in fuel economyC
reduction in lube oil viscosityD
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late fuel injectionB
early fuel injectionC
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the centrifuge to its proper speedD
install an additional discharge ring
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单选题Engine coolant accumulating in the diesel engine lubricating oil can result from a （）A
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单选题The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.A
quantity of fuel to be receivedB
flash point of the fuel as it is receivedC
fuel temperature as it is receivedD
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lube oil strainer magnets bearingC
lube oil temperatureD
lube oil pressure to the bearing
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单选题The temperature of the fuel oil received during bunkering operations is critical in determining the（）A
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flash point at which the fuel will burnC
temperature to which the fuel must be heatedD
rate at which the fuel can be pumped during transfer operations
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单选题Proper filtering and straining of fuel oil is important because the （）.A
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