Bad combustion of the fuel
Bad atomization of the fuel
Liquid contaminants
Solid contaminants
第1题：
When fuel is injected late into a diesel engine cylinder_______.
A.the exhaust will be clear
B.fuel consumption will be low
C.all the fuel will be burned at top dead center
D.fuel consumption will be high
第2题：
clogged coolant passages
a leaking cylinder head gasket
low fuel oil pressure
worn or broken cylinder liner sealing rings
第3题：
Because the timing of injection is crucial, _____ mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.
A.gears
B.rams
C.barrels
D.cams
第4题：
a leaking fuel injector nozzle
a clogged air filter
excessively early fuel injection
malfunctioning valves
第5题：
clogged fuel injection pumps
increased cylinder liner wear
intake valve stem corrosion
varnish deposit on pistons
第6题：
Fuel is admitted to a diesel engine cylinder through the ______.
A.injector nozzles
B.carburetor
C.exhaust ports
D.intake valves
第7题：
the exhaust valves
the fuel valves
indicator cocks
the fuel pumps
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：
quality of air filtration
effectiveness of lubrication
type of fuel used
all of the above
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