更多"A smoking burner with a pulsating f"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]Failure of the burner flame in an auxiliary boiler would probably be a result of（）
A. water in the fuel oil
B. broken high tension leads
C. incorrect electrode setting
D. full fuel pressure at the nozzle
[单项选择]White smoke issuing from the exhaust of an auxiliary diesel engine valve opening （）
A. the engine is overloaded
B. the engine is cold
C. there is too much lube oil in the cylinders
D. the turbocharger is fouled
[单项选择]The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler （）
A. steam demand is high
B. salinity is high
C. safety valve simmers
D. burner flame is extinguished
[单项选择]The boiler water alkalinity in a coil-type auxiliary boiler should be maintained at the pH recommended by the boiler manufacturer to（）
A. precipitate silica from solution
B. reduce corrosion in the heating coil
C. prevent clogging and erosion in the coil
D. maintain zero water hardness
[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]Burner ignition failure in an automatically fired auxiliary boiler would be caused by（）
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
[单项选择]A flame screen（）.
A. permits the passage of vapor but not of flame
B. prevents the passage of flammable vapors
C. prevents inert gas from leaving a tank
D. permits vapors to exit but not enter a tank
[单项选择]In boilers, besides maintaining the burner atomizers, air diffuser vanes, fuel temperature, forced draft fan, fuel pump and other hardware in good condition, there are some adjustments on the （）that can produce a good flame for the most efficient operation.
A. fuel-air ratio
B. compression ratio
C. fuel rack
D. viscosity index
[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]A burner responsible for producing black smoke in an automatic auxiliary boiler, would be caused by a （）
A. defective solenoid valve
B. dirty fuel nozzle
C. grounded high tension lead
D. faulty ignition cable connector
[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]If the flame from combustion in the cylinder of a four-stroke engine past the piston into the space below, the accumulation of flammable mixture would be ignited, thus resulting in （）.
A. the crankcase explosion
B. lifting of the cylinder safety valve
C. a scavenge fire
D. opening of the manhole
[单项选择]Flame screens are used to（）.
A. contain flammable fumes
B. protect firefighters from flames
C. prevent flames from entering tanks
D. keep flames and sparks from getting out of an engine's exhaust system
[单项选择]If a diesel engine is smoking excessively under load, the cause could be （）
A. low exhaust back pressure
B. early fuel injection in one of the cylinders
C. compression pressure in one of the cylinders
D. plugged injector holes
