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单选题
If a diesel engines exhaust temperature is abnormally high, the cause could be（）
A
too light of a load
B
injection timing is too early
C
overloading of the engine
D
too low of a compression ratio
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单选题Late fuel injection timing is indicated by （）A
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lower than normal cylinder pressure and high exhaust temperatureC
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单选题Early injection timing is indicated by （）.A
high exhaust temperature and low firing pressureB
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low exhaust temperature and low firing pressureD
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reduce heat radiation to the engine roomB
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单选题Poor combustion in a diesel engine can be caused by （）.A
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low exhaust pressureD
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单选题The satisfactory operation of diesel engine exhaust valves usually depends on（）A
the proper back pressureB
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单选题The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）A
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low compression pressureD
high exhaust temperature
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low combustion temperatureC
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单选题Which of the listed set of conditions indicates early fuel injection timing?（）A
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单选题One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to （）A
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考题
单选题The process of scavenging a two-stroke/cycle diesel engine serves to（）A
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cool the exhaust valvesC
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单选题An indication of a diesel engine air intake being partially clogged, is （）.A
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单选题If a diesel engines exhaust temperature is abnormally high, the cause could be（）A
too light of a loadB
injection timing is too earlyC
overloading of the engineD
too low of a compression ratio
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单选题A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （） (1) scavenging air is cooling the exhaust gases (2) exhaust cycle time is longerA
(1) onlyB
(2) onlyC
both (1) and (2)D
neither (1) nor (2)
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