更多"Failure of the burner flame in an a"的相关试题:
[单项选择]A dazzling white burner flame in the boiler furnace indicates （）.
A. proper combustion
B. water in the fuel
C. excess air
D. cold fuel oil
[单项选择]Flame failure in an automatically fired auxiliary boiler can from a/an （）
A. incorrect electrode setting
B. incorrect nozzle position
C. clogged fuel nozzle
D. broken high tension lead
[单项选择]
When does auxiliary burner of rotary nozzle incinerator begin to work? （）
Ⅰ.hen igniting
Ⅱ.he sludge for dealing with is too much
Ⅲ.efore stopping incinerator
A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
[单项选择]
When does auxiliary burner of incinerator put into operation? （）
Ⅰ. start incinerator when it is cold
Ⅱ. the sludge for dealing with is little
Ⅲ. the sludge for dealing with is large
Ⅳ. the water and impurity in sludge are too much
Ⅴ. the temperature in incinerator is low
Ⅵ. dealing with little solid rubbish
A. Ⅰ+Ⅱ+Ⅲ+Ⅴ
B. Ⅰ+Ⅱ+Ⅲ+Ⅳ
C. Ⅰ+Ⅳ+Ⅴ+Ⅵ
D. Ⅰ+Ⅱ+Ⅲ+Ⅵ
[单项选择]A （） boiler is an auxiliary boiler sometimes included in a steamships installation for supplying steam to auxiliaries in port.
A. monkey
B. donkey
C. waste heat
D. main
[单项选择]In the event of a flame failure in an auxiliary water-tube boiler, you must（）
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
[单项选择]In readying an auxiliary water-tube boiler for a routine hydrostatic test, which of the following procedures should be undertaken prior to filling the boiler with fresh water?（）
A. The safety valve escape piping should be disconnected from the valve body and a blank inserted
B. The boiler vent valves should be opened
C. All hand-hole/manhole covers should be tightened up as much as possible to preclude any leaks
D. All of the above
[单项选择]For proper operation, auxiliary boiler feed water must have which of the following characteristics?（）
A. High oxygen concentration
B. Low pH
C. Proper alkalinity
D. All of the above
[单项选择]Heavy soot accumulations in an auxiliary boiler could be caused by（）
A. water in the fuel oil
B. excessive cycling
C. high fuel oil pressure
D. improper burner maintenance
[单项选择]The water in an operating auxiliary boiler should be tested for alkalinity and chloride content each（）.
A. hour
B. day
C. week
D. month
[单项选择]The water level in a steaming auxiliary boiler will always （）
A. rise when the steam pressure is increased
B. remain constant as long as the feed pump operates
C. fall when the steam pressure is decreased
D. vary as the steam demand changes
[单项选择]When an auxiliary boiler is panting and emitting 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
[单项选择]The water in an auxiliary boiler should be tested daily for （）.
A. dissolved oxygen
B. chlorides
C. sludge
D. dissolved nitrogen
