A.lime
B.frost
C.scale
D.scar
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A.scar
B.scale
C.spur
D.bilge
A.continuously
B.regularly
C.constantly
D.period
A.to change the lube oil
B.have the lube oil purified
C.have the lube oil burnt
D.to analyze the lube oil
A.not less than twice
B.greater at least twice than
C.not greater twice than
D.larger three times than
A.not be changed
B.be changed
C.should not be changed
D.should be changed
最新試題
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
The function of diesel engine piston compression rings is to （）.
Maximum horsepower of a diesel engine is attained （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
An automated diesel engine should normally shut down due to （）
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
White smoke exhausting from an operating diesel engine may indicate （）.
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.