A.relight the boiler immediately to prevent loss of steam pressure
B.relight the fire off the brickwork as the bricks are cherry red
C.purge the furnace of any combustible gases before attempting to relight the fire
D.speed up the feed pump to prevent dry firing when the burner flame is reestablished
您可能感興趣的試卷
你可能感興趣的試題
A.in the event of a flame failure
B.in the event of a stack fire
C.when the water level reach the crown sheet
D.when the feed pump discharge pressure drops to a preset minimum
A.a burned out solenoid in the oil supply valve
B.high temperature excess air
C.incorrectly setting the hot-well dump valve
D.an incorrectly positioned burner snubber realy
A.clean the flame scanner photocell window
B.Inspect and clean all solenoid valves
C.lift the safety valves by hand
D.Inspect for oil or water leaks
A.cold fuel oil
B.low fuel oil pressure
C.low atomizing steam pressure
D.water in the fuel oil
A.adding hydrazine
B.blowing down the boiler
C.adding phenolphthalein
D.adding a sulfite chloride scavenger
最新試題
The treatment of the fuel oils involves storage, heating, filtering and（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
The main purpose of port State control is not to（）
Which of the following items don’t belong to dock repair works?（）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）