A.starting air and fuel pumps
B.piston cooling pumps
C.exhaust valves
D.all of the above
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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) only is correct
B.(2) only is correct
C.both (1) and (2) are correct
D.Neither (1) or (2) are correct
A.water
B.babbitt
C.iron or steel
D.acids
A.Impurities
B.Lube oil
C.Gasoline
D.Diesel fuel
A.moisture
B.dirt
C.acid
D.air
A.relieve excess fuel oil pressure during the “off” fire cycle
B.admit water to the dry pipe
C.throttle the forced draft fan output for proper combustion
D.reduce excess steam pressure in the boiler
最新試題
What is the function of the thrust bearing?（）
An automated diesel engine should normally shut down due to （）
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.