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