单项选择题
A.reduce gas flow turbulence B.prevent exhaust gas corrosion C.increase the rate of combustion D.increase the rate of heat transfer
Directional intake ports in diesel engines are used to ...
单项选择题Directional intake ports in diesel engines are used to （）.
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
Mist detectors used on large low-speed main propulsion ...
单项选择题Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
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
Clearance volume scavenging in a turbocharged, four-str...
单项选择题Clearance volume scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished （）.
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
