A.a fire -tube boiler
B.an internal combustion engine
C.an external combustion engine
D.an internal combustion generator
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A.the bearing clearances
B.the bearing thickness
C.the bearing strength
D.the bridge hardness
A.on top cover
B.on sides of bowl
C.in drain line on the discs
D.on the discs
A.low specific heat
B.high specific heat
C.corrosive action
D.high viscosity
A.low specific heat
B.corrosive action
C.high expense
D.acid property
A.injecting fuel oil into a cylinder
B.removing exhaust gases from the cylinder
C.forcing air into the cylinders under pressure after the exhaust valve has dosed
D.a combination of all the above
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Maximum horsepower of a diesel engine is attained （）.
What is the function of the thrust bearing?（）
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
The main purpose of the piston oil scraper rings is to （）.
A thrust bearing is used with a propulsion diesel engine to （）.
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
Diesel engine control can be obtained by the bridge （）.
The function of diesel engine piston compression rings is to （）.