a high exhaust temperature
a high smoky exhaust
a high output
a high compression
第1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2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3题：
Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?
A.Control the amount of lube oil burned in the combustion chamber
B.Transmit heat from the piston to the cylinder liner
C.Prevent damage to ring groove inserts by acting as a heat dam
D.Dissipate combustion chamber gas pressure by channeling it through the ring gap
第4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5题：
decreased compression pressure
increased lube oil pressure
lower lube oil temperature
excessive leakage past the piston rings
第6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7题：
drill cooled
hole cooled
tube cooled
bore cooled
第8题：
A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal .the probable ___.
A.engine overload
B.leaky valves
C.stuck or broken piston rings
D.low air injection pressure
第9题：
engine overload
leaky valves
stuck or broken piston rings
low air injection pressure
第10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