A.piston crown
B.piston groove
C.piston skirt
D.piston ring belt
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A.craned out
B.rolled out
C.lifted out
D.turned out
A.aluminum-plated
B.bronze-plated
C.zinc-plated
D.chromium-plated
A.must be provided
B.may be provided
C.have provided
D.can be provided
A.has to be cooled
B.has heated
C.has preheated
D.has to be preheated
A.inefficiency
B.oiliness
C.detergency
D.purity
最新試題
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
A thrust bearing is used with a propulsion diesel engine to （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
Maximum horsepower of a diesel engine is attained （）.
A diesel engine piston ring face is in direct contact with the （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
Diesel engine control can be obtained by the bridge （）.
Lube oil cannot be efficiently filtered if its （）.
In using reduction gears to obtain efficient propeller speeds, （）.