A.smoky
B.a little bit dense
C.visible
D.almost invisible
您可能感興趣的試卷
你可能感興趣的試題
A.the pressure of the starting air is high enough
B.there is enough air in the air reservoirs
C.the air is supplied into the cylinders in the appropriate sequence
D.all of the above
A.the start fails
B.the fuel pumps will be put into operation
C.the fuel valves are damaged
D.the combustion process will take over
A.crack
B.knocking
C.leaking
D.seizure
A.pressure oil
B.pressure water
C.compressed air
D.cooling water
A.lathed
B.shaped
C.shrunk
D.developed
最新試題
Maximum horsepower of a diesel engine is attained （）.
The main purpose of the piston oil scraper rings is to （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
A thrust bearing is used with a propulsion diesel engine to （）.
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
In a simple mechanical governor, the （）.