early fuel injection timing
leaking valves
a continuously open scavenge air port
low cooling water temperature
第1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2题：
Improper fuel rack positioning
Lengthy opening of the exhaust valve
Excessively early injection timing
Extended light load operation
第3题：
High cylinder firing pressure, accompanied by low exhaust temperature, can result from ___.
A.improper fuel rack positing
B.lengthy exhaust valve duration
C.extend operation at light load
D.excessively early injection timing
第4题：
compressor；condenser
condenser；evaporator
throttle valve；evaporator
evaporator；condenser
第5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6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7题：
clogged air filter
compression stroke
burned exhaust valves
all of the above
第8题：
High firing pressures and low exhaust temperature in a diesel engine may resultfrom( ).
A.decreased piston to cylinder head clearance
B.increased exhaust system back pressure
C.early fuel injection timing
D.low scavenge air temperature
第9题：
high exhaust temperature and low firing pressure
high exhaust temperature and high firing pressure
low exhaust temperature and low firing pressure
low exhaust temperature and high firing pressure
第10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