A.to stiffen
B.to soften
C.to loosen
D.to wear
您可能感興趣的試卷
你可能感興趣的試題
A.prepare to stop the engine
B.assemble an engine on its bedplate
C.make an engine ready for starting
D.make an engine run steadily
A.through bolts
B.turbo-chargers
C.bed plates
D.columns
A.through bolts
B.dividing walls
C.sloping surfaces
D.relative angles
A.connecting rods
B.crankshaft
C.crankcase
D.through bolts
A.a fire -tube boiler
B.an internal combustion engine
C.an external combustion engine
D.an internal combustion generator
最新試題
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）
The minimum speed an engine must attain before ignition can occur depends upon （）.
Maximum horsepower of a diesel engine is attained （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
In using reduction gears to obtain efficient propeller speeds, （）.
A diesel engine piston ring face is in direct contact with the （）.
A thrust bearing is used with a propulsion diesel engine to （）.