A.Splash lubrication
B.Pressure lubrication
C.Sight feed lubricators
D.Mechanical lubricators
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A.react with insufficient speed droop
B.fail to react to small speed changes
C.have excessive sensitivity to small speed changes
D.remain in the neutral position
A.provide a means of draining the boiler
B.warn the engineer of low water level
C.cool the crown sheet at high firing rates
D.open the burners electrical firing circuits
A.the beveled edges of the intake valves provide for serf-centering during seating
B.intake valves utilize stellite-coated valve seat inserts which reduce wear
C.the volume of air passing through intake valves is less than the volume of air passing through exhaust valves
D.intake valves are less affected to the corrosive action of exhaust gases
A.Drain the accumulated moisture
B.Test the relief valves
C.Watch the temperature to prevent fluctuations in pressure
D.Clean the interior to remove oil and foreign matter
A.worn main bearing journals
B.torsional stress deformation
C.slack thrust bearings
D.bearing shells shim dimensions
最新試題
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
The main purpose of the piston oil scraper rings is to （）.
Routine monitoring of a diesel engine should include （）.
Combustion knock occurring in a diesel engine can be caused by （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）
What is the function of the thrust bearing?（）
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.