salinity is abnormally high
steam demand is too high
water level is abnormally low
feedwater flow is low
第1题：
A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A.corrosion at low engine loads
B.erosion at high engine loads
C.overload at high engine loads
D.scaling at all exhaust temperatures
第2题：
relieve excess fuel oil pressure during the “off” fire cycle
admit water to the dry pipe
throttle the forced draft fan output for proper combustion
reduce excess steam pressure in the boiler
第3题：
A.salinity is abnormally
B.high steam demand is too
C.feed-water flow is low
D.water level is abnormally low
第4题：
steam stop valve
dry pipe
feedwater system
generating tubes
第5题：
fuel oil supply temperature is normal
burner electrode is incorrectly positioned
fuel／air ratio is incorrect
ignition current is too low
第6题：
cold fuel oil
low fuel oil pressure
low atomizing steam pressure
water in the fuel oil
第7题：
Move the fuel control mechanism to the no fuel position
Block the fuel supply by closing the master fuel valve
Shut off the fuel supply and block the flow of intake air
Relieve all pressure in the fuel system
第8题：
When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.
A.increase the fuel oil temperature
B.decrease the fuel oil temperature
C.decrease the fuel oil supply pressure
D.increase the air supply
第9题：
increase the fuel oil temperature
decrease the fuel oil temperature
decrease the fuel oil supply pressure
increase the air supply
第10题：
fuel pump failure
fan motor failure
increased feedwater consumption
decreased boiler efficiency