reduce mean effective pressure
decrease average compression pressure
decrease air charge density
increase power output
第1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2题：
a leaking seal ring
heat transfer from exhaust valves
restricted cooling passages
overheated intake valves
第3题：
What is the function of the after-coolers installed in the diesel engine air intake system?
A.Decrease the air density
B.Increase the exhaust temperature
C.Decrease the lube oil temperature
D.Increase the air density
第4题：
high compression pressure
low intake air temperature
low exhaust pressure
high scavenge air temperature
第5题：
Disconnect the battery cables from the starting motor
Drain the hydraulic fluid from the governor sump
Block the flow of cooling air to the radiator
Secure the fuel supply and block the air intake
第6题：
natural aspiration
masked intake valves
air cells
scavenging air
第7题：
exhaust gas pressure
exhaust gas temperature
speed
load
第8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9题：
oil spray
oil bath
oil control rings
drilled passage through the camshaft
第10题：
increase in starting air pressure
increase in lube oil viscosity
compression expansion device
jacket water heater