low sulfur content in the fuel
a loose injector inlet connection
late fuel injection
high injection pressure
第1题：
A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.
A.increasing the linear velocity of the exhaust gases
B.changing directions of exhaust gas flow
C.decreasing the temperature of the exhaust gases
D.accelerating the exhaust gas through a reduced size orifice
第2题：
How would the exhaust of a properly operating diesel engine appear ________．
A.Light blue haze
B.Light brown haze
C.Light gray haze
D.Perfectly clear
第3题：
Overspeed of the diesel engine driving an electric generator could cause ______.
A.low voltage trip
B.reverse power trip
C.damage to windings
D.excessive exhaust temperatures
第4题：
liquid in the cylinder
low compression in the cylinder
high exhaust temperature
poor fuel penetration
第5题：
reduce heat radiation to the engine room
aid in preventing turbocharger overheating
condense and drain moisture from exhaust gases
dampen exhaust gas pulsations in the manifold
第6题：
Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?
A.Leaking seal ring
B.Insufficient heat transfer from the exhaust valves
C.Blocked cooling water passages to the head
D.Excessive scavenging air provided to the engine
第7题：
to be kept
logged
changed
has remained
第8题：
A smoking exhaust from an operating diesel engine could be caused by( ).
A.low sulfur content in the fuel
B.a loose injector inlet connection
C.late fuel injection
D.high injection pressure
第9题：
the engine is overloaded
the engine is cold
there is too much lube oil in the cylinders
the turbocharger is fouled
第10题：
Leaking seal ring
Insufficient heat transfer from the exhaust valves
Block cooling water passages to the head
Excessive scavenging air provided to the engine