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单选题
Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）
A
scavenging
B
forced draft
C
turbo-charging
D
aspiration
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单选题The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）A
check the cylinder exhausts for black smokeB
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isolate each cylinder and inspect the injectorD
check the cylinder exhaust temperature frequently
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单选题The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）A
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单选题In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in （）A
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frameB
pistonC
crankcaseD
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单选题In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.A
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conducted through the piston crownD
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above normal with a normal exhaust temperatureC
below normal with a normal exhaust temperatureD
below normal with an above normal exhaust temperature
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单选题If you notice smoke coming fro the crankcase exhaust fan outlet of an operating diesel engine, you would suspect（）A
a cracked cylinder linerB
clogged intake portsC
broken piston ringsD
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考题
单选题The process of scavenging a two-stroke/cycle diesel engine serves to（）A
improve fuel flow volumeB
cool the exhaust valvesC
reduce the intake air charge densityD
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单选题A piston is said to be at top dead center when it is （）A
opening the exhaust portsB
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test cylinder headsD
connect the exhaust gas pyrometers
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