A.bottom blow the boiler
B.treat the water with caustic soda
C.treat the water with chemical scavengers
D.reduce the water alkalinity to recommended readings
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A.reduce gas flow turbulence
B.prevent exhaust gas corrosion
C.increase the rate of combustion
D.increase the rate of heat transfer
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
最新試題
The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.
In using reduction gears to obtain efficient propeller speeds, （）.
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
White smoke exhausting from an operating diesel engine may indicate （）.
Routine monitoring of a diesel engine should include （）.
What is the function of the thrust bearing?（）
Proper filtering and straining of fuel oil is important because the （）.