engine overload
low combustion temperature
plugged fuel nozzle holes
excessive compression pressure
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：
In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.
A.low firing pressure
B.low exhaust temperature
C.mechanical knock in each cylinder
D.fuel knock in each cylinder
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：
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5题：
water in the fuel
insufficient fuel for combustion
clogged air intake passages
burning lubricating oil
第6题：
Engine operating conditions may be indicated by the color of the exhaust smoke Black smoke could indicate .
A.an insufficient speed droop setting
B.an overloaded engine
C.clogged drain holes in the oil control rings
D.complete combustion
第7题：
proper fuel injection
water in the fuel
incomplete combustion
burning of lube oil
第8题：
An indication of an overloaded main propulsion diesel engine is( ).
A.white smoke in the exhaust
B.high exhaust gas pyrometer readings
C.sparks in the exhaust
D.blue smoke in the exhaust
第9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10题：
a cracked liner
burning lube oil
an overloaded engine
insufficient combustion air