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单选题
Dirt in a fuel oil system of a diesel engine can cause （）
A
damage to strainers
B
over-speeding of the engine
C
excessive cooling of the engine
D
injector damage
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单选题A diesel engine is turned at normal cranking speed, but fails to fireThis can occur from （）A
low lube oil temperatureB
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单选题The oxidation by-products forming in diesel engine lube oil can cause （）A
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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
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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
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单选题Air in the fuel can cause（）A
high lube oil temperatureB
blue smokeC
the engine to stopD
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单选题Diesel engine fuel oil contamination often results in （）A
governor malfunctionsB
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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
考题
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Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the （）A
electronic ignition systemB
compression of air by the pistonC
friction in the fuel injectorD
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单选题If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the （）A
fuel line connections to cylinder injection valvesB
gasket surfaces of the fuel oil filtersC
discharge fitting of the fuel injector pumpsD
suction side of the fuel oil tran
考题
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
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考题
单选题Clogged diesel engine fuel oil filters can cause（）A
loss of powerB
misfiringC
low fuel oil pressureD
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考题
单选题On a diesel engine, fuel is delivered into the combustion space by （）.A
a cooling systemB
a lubrication oil systemC
an electric systemD
an injection system
考题
单选题Sudden unloading of a diesel engine can cause（）.A
decreased fuel efficiencyB
increased exhaust temperatureC
black smokeD
overspeed trip
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