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
Combustion knock occurring in a diesel engine can be caused by （）.
An automated diesel engine should normally shut down due to （）
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?（）
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
The function of diesel engine piston compression rings is to （）.
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
Lube oil cannot be efficiently filtered if its （）.
The minimum speed an engine must attain before ignition can occur depends upon （）.
Proper filtering and straining of fuel oil is important because the （）.
To determine if the lube oil filter elements need changing, （）.