increased engine back pressure
sulfuric acid corrosion
surface pitting of the turbocharger
moisture impingement on the turbocharger compressor blade
第1题：
A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A.corrosion at low engine loads
B.erosion at high engine loads
C.overload at high engine loads
D.scaling at all exhaust temperatures
第2题：
stop the engine immediately to prevent damage
increase lube oil pressure
slow the engine allowing it to gradually cool
decrease the cooling water it temperature to the water jacket
第3题：
A two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four stroke
A.①
B.②
C.① and ②
D.Neither ① nor ② is correct
第4题：
high exhaust temperature
high lube oil temperature
low turbo-charger speed
low cooling water temperature
第5题：
reduce lube oil temperature
raise exhaust temperature reduce
excessive heating of engine room
reduce load on cooling water pump
第6题：
Before starting any diesel or gasoline engine, which of the following must be checked?____.
A.Oil level
B.Flow of cooling water
C.Exhaust discharge
D.All of the above
第7题：
a leaking seal ring
heat transfer from exhaust valves
restricted cooling passages
overheated intake valves
第8题：
High diesel engine cooling water temperatures can be caused by ______.
A.air in the cooling system
B.an overhauled water pump
C.correct amount of coolant
D.no air in the cooling system
第9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
第10题：
air binding of the engine cooling system
a cracked water cooled exhaust manifold
blockage in the heat exchanger
faulty operation of the thermostat