Advanced ignition
Clogged air intake
Leaky exhaust valve
High exhaust pressure
第1题：
be jammed
be opened
be seated
be broken
第2题：
feel the high pressure fuel line
check the cylinder exhausts for white smoke frequently
check the cylinder exhaust temperature
isolate each cylinder and inspect the injector
第3题：
If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the
A.cylinder compression pressure may not be high enough
B.cylinder compression temperature may be too high
C.fuel oil injection pressure may not be high enough
D.scavenge and purge process is incomplete
第4题：
early fuel injection timing
leaking valves
a continuously open scavenge air port
low cooling water temperature
第5题：
overloading the engine
low exhaust valve lift
excessive cylinder cooling
insufficient mechanical clearance
第6题：
lower than normal cylinder pressure and low exhaust temperature
lower than normal cylinder pressure and high exhaust temperature
higher than normal cylinder pressure and low exhaust temperature
higher than normal cylinder pressure and high exhaust temperature
第7题：
Low compression pressure and high exhaust temperature
Low firing pressure and high exhaust temperature
Low compression pressure and low exhaust temperature
Low firing pressure and low exhaust temperature
第8题：
Low compression in a diesel engine could be caused by
A.worn or broken cylinder liner sealing rings
B.high cooling water temperature
C.worn or broken piston rings
D.low fuel oil pressure
第9题：
a leaking fuel injection nozzle
a clogged air filter
early fuel injection
burned valves
第10题：
low water in the expansion tank
improperly seated valves
low fuel oil pressure
worn or broken cylinder liner sealing rings