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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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单选题If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST （）.A
secure the ventilationB
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in order thatB
because ofC
in order toD
owing to
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单选题Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）A
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higher lube oil pressuresC
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improved cold weather startingB
excessive fuel oil consumptionC
reduced ignition lagD
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单选题Late fuel oil injection in a diesel engine can result in （）A
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
none of the above
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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
indicates the quantity of energy released by burning a unit amount of the fuelC
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
the dilution of crankcase oil with particles of combustionC
broken fuel lines spraying oil on the crankcaseD
the ignition of unburned fuel and air in the crankcase
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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 injectors may be damaged by foreign particles in the fuel oil dirtyD
fuel will clog the intake air filter
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decrease in ignition lagB
increase in fuel economyC
reduction in lube oil viscosityD
increase in cylinder misfiring
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late fuel injectionB
early fuel injectionC
high exhaust temperature from that cylinderD
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re-prime the purifierC
the centrifuge to its proper speedD
install an additional discharge ring
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for centrifugingC
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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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单选题To guarantee that a reduction gear bearing is receiving proper oil supply, you should check the （）A
lube oil temperature at the cooler outletB
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
expansion space to leave in a tankB
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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fuel injectors may be damaged by foreign particles in the fuel oilD
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oil foaming will occurB
large quantities of oil are consumedC
lube oil viscosity is always decreasedD
corrosive by-products are usually formed
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