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
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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
A.contaminated with sludge
B.contaminated with carbon
C.diluted with fuel oil
D.diluted with water
A.the solid impurities of large particle
B.the solid impurities of fine particle
C.the water content
D.both water and solid impurities
最新試題
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
The highest pressure in a diesel engine cylinder normally occurs （）.
What is the function of the thrust bearing?（）
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?（）
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
In using reduction gears to obtain efficient propeller speeds, （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
A diesel engine piston ring face is in direct contact with the （）.