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单选题
Clogged diesel engine fuel oil filters can cause（）
A
loss of power
B
misfiring
C
low fuel oil pressure
D
All of the above
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单选题Dirt in a fuel oil system of a diesel engine can cause （）A
damage to strainersB
over-speeding of the engineC
excessive cooling of the engineD
injector damage
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单选题Care and cleanliness are required when installing diesel fuel filters （）.A
to prevent the fuel system from becoming air-houndB
to prevent the fuel system becoming clogged with dirty particlesC
both of the aboveD
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increasing the quantity of starting airB
increasing the lube oil pressureC
heating the engine fuel supplyD
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单选题The oxidation by-products forming in diesel engine lube oil can cause （）A
pittingB
sludgeC
hard varnishD
all of the above
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the engine to run after the fuel has been securedB
the engine to over-speedC
a fireD
all of the above
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单选题A sudden drop in diesel engine cylinder compression pressure can be caused by（）A
a leaking fuel injector nozzleB
a clogged air filterC
excessively early fuel injectionD
malfunctioning valves
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单选题Air in the fuel lines of a diesel engine can cause （）A
ignition failureB
oxygen corrosion of the fuel linesC
the pistons to seizeD
blue smoke
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单选题Clogged or partially obstructed exhaust ports on a diesel engine can cause（）A
over-speeding of the engineB
failure of the engine to shut downC
no effect of engine mounting boltsD
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单选题Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）A
an increased flash pointB
higher lube oil pressuresC
an increased viscosityD
lower lube oil pressures
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单选题Air in the fuel can cause（）A
high lube oil temperatureB
blue smokeC
the engine to stopD
piston seizure
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单选题Which of the following conditions can cause excessive lube oil consumption in a diesel engine?（）A
Low lube oil temperatureB
Dirty lube oil strainerC
Low lube oil pressureD
High lube oil temperature
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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A drop in compression pressure in one cylinder of a diesel engine can be caused by（）A
a leaking fuel injection nozzleB
a clogged air filterC
early fuel injectionD
burned valves
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单选题Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?（）A
Leaking fuel injectorsB
Lower than normal compressionC
Delayed fuel injectionD
All of the above are correct
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单选题Dirt in the fuel oil system of a diesel engine can cause （）.A
clogged filtersB
poor combustionC
overloading of the dieselD
shock of fuel lines
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单选题If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）A
excessive fuel pressureB
high lube oil viscosityC
inadequate fuel injectionD
excessive starting air pressure
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单选题Broken intake valve springs on one cylinder of a diesel engine can cause the engine to （）A
Over speedB
fire improperlyC
lose oil pressureD
overheatrapidly
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单选题Permitting a diesel engine fuel oil day tank to run dry can cause （）A
overheated injection pumpsB
water condensation in the cylindersC
fuel dilution of the lube oilD
air in the fuel system
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单选题Faulty operation of diesel engine fuel injection nozzles can be a direct cause of（）.A
excessive fuel nozzle holder coolingB
sediment in the fuel supplyC
distortion of the fuel spray patternD
improper atomization of the fuel
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单选题The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.A
fuel treatmentB
fuel combustionC
fuel injectionD
fuel separating
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单选题Engine coolant accumulating in the diesel engine lubricating oil can result from a （）A
low oil pressureB
high coolant pressureC
leaking fuel injectorD
cracked cylinder head or liner
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单选题Faulty operation of diesel engine fuel injection nozzles can be directly caused by （）.A
water in the fuel oil supplyB
excessive fuel nozzle holder coolingC
a distorted fuel spray patternD
leakage past the plunger into the oil drain
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单选题A sudden drop in compression pressure in one cylinder of a diesel engine can be caused by（）A
a leaking fuel injector nozzleB
a clogged air filterC
excessively early fuel injectionD
malfunctioning valves
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单选题Lubricating oil viscosity in an operating diesel engine can be reduced by（）A
increasing cooling water flowB
increasing lube oil flowC
dilution by fuel oilD
adding SAE 70 oil
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单选题Sudden unloading of a diesel engine can cause（）.A
decreased fuel efficiencyB
increased exhaust temperatureC
black smokeD
overspeed trip
考题
单选题After changing out the fuel filters the diesel engine fails to restart, the most probable cause for this condition is a/an（）.A
low compressionB
air-bound fuel systemC
improper sparkD
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