A.make
B.cause
C.result
D.produce
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A.boiler
B.heater
C.engine
D.cooler
A.to retain
B.to remain
C.to maintenance
D.to have
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
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When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
The function of diesel engine piston compression rings is to （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
A diesel engine piston ring face is in direct contact with the （）.
To determine if the lube oil filter elements need changing, （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
Proper filtering and straining of fuel oil is important because the （）.