A.moisture
B.dirt
C.acid
D.air
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A.relieve excess fuel oil pressure during the “off” fire cycle
B.admit water to the dry pipe
C.throttle the forced draft fan output for proper combustion
D.reduce excess steam pressure in the boiler
A.60 to75
B.80 to 95
C.100 to 115
D.120 to 135
A.heat conduction into the injected fuel oil
B.heat conduction into the water jacket wall
C.water circulation through passages in the holder
D.fuel oil circulation through passages in the holder
A.slightly acidic condition
B.slightly alkaline condition
C.overtreatment of water
D.neutral condition of water
A.Combustion gases flow through the tubes
B.Flames impinge on the tubes
C.Combustion occurs in the tubes
D.Water flows through the tubes
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Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
Diesel engine control can be obtained by the bridge （）.
Proper filtering and straining of fuel oil is important because the （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
Combustion knock occurring in a diesel engine can be caused by （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）
White smoke exhausting from an operating diesel engine may indicate （）.
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.