A.to retain
B.to remain
C.to maintenance
D.to have
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A.good lubrication
B.low thermal stress
C.good mechanical properties
D.acid corrosion
A.for starting diesel engines
B.in pneumatic control system
C.in pneumatic tools
D.All the above are true
A.the air receivers
B.the starting valves
C.the cylinder covers
D.the distributors
A.machine efficiency
B.machinery efficiency
C.mechanical efficiency
D.mechanics efficiency
A.to need
B.ready for
C.want to
D.going to be
最新試題
The highest pressure in a diesel engine cylinder normally occurs （）.
The main purpose of the piston oil scraper rings is to （）.
Lube oil cannot be efficiently filtered if its （）.
A diesel engine piston ring face is in direct contact with 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 （）.
What is the function of the thrust bearing?（）
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
Combustion knock occurring in a diesel engine can be caused by （）.
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?（）