A.reduce gas flow turbulence
B.prevent exhaust gas corrosion
C.increase the rate of combustion
D.increase the rate of heat transfer
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A.reduce air charge turbulence
B.induce air swirl
C.deflect hot combustion gas away from the valves
D.oppose the effects of piston induced squish
A.fuel oil vapor at the sludge tank vent
B.unburned fuel vapors in the scavenge air receiver
C.lube oil vapors in the crank case
D.lube oil vapors in the engine room
A.during the valve overlap period
B.with only the exhaust valve open
C.at a pressure below atmospheric
D.without cooling the cylinders or pistons
A.a short length of heavy duty clear plastic tubing
B.a length of approved flexible nonmetallic hose
C.welded flange connections for all joints
D.aluminum piping with expansion loops
A.pick up more of any increase in load
B.pick up less of any increase in load
C.share an equal amount of any increase in load
D.drop an equal amount of any decrease in load
最新試題
The minimum speed an engine must attain before ignition can occur depends upon （）.
A thrust bearing is used with a propulsion diesel engine to （）.
To determine if the lube oil filter elements need changing, （）.
The function of diesel engine piston compression rings is to （）.
Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
In a simple mechanical governor, the （）.
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
Lube oil cannot be efficiently filtered if its （）.