网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
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
参考答案
参考解析
解析：
暂无解析
更多 “单选题Failure of the burner flame in an auxiliary boiler would probably be a result of（）A water in the fuel oilB broken high tension leadsC incorrect electrode settingD full fuel pressure at the nozzle” 相关考题
考题
The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler ______.A.steam demand is highB.salinity is highC.safety valve simmers(爆发)D.burner flame is extinguished
考题
单选题The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner（）A
in the event of a flame failureB
in the event of a stack fireC
when the water level reach the crown sheetD
when the feed pump discharge pressure drops to a preset minimum
考题
单选题Proper combustion in a boiler would be indicated by （）.A
yellowish flameB
golden yellow flameC
white flameD
brilliant white flame
考题
单选题Too much air in the furnace of an oil-fired boiler would be indicated by （）.A
yellowish flameB
golden yellow flameC
white flameD
brilliant white flame
考题
单选题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 pressureB
relight the fire off the brickwork as the bricks are cherry redC
purge the furnace of any combustible gases before attempting to relight the fireD
speed up the feed pump to prevent dry firing when the burner flame is reestablished
考题
单选题A smoking burner with a pulsating flame in auxiliary boiler, is an indication that the（）A
fuel oil supply temperature is normalB
burner electrode is incorrectly positionedC
fuel／air ratio is incorrectD
ignition current is too low
考题
单选题Improper maintenance of an automatic auxiliary boiler oil burner could result in （）.A
fuel pump failureB
fan motor failureC
increased feedwater consumptionD
decreased boiler efficiency
考题
单选题During waste clothes being charged into an incinerator, the auxiliary burner（）.A
should be stopped manuallyB
keeps the combustion as usualC
would be cut off by an interlockD
would replace the waste oil burner and keep going on
考题
单选题The water in an auxiliary boiler should be tested daily for （）.A
dissolved oxygenB
chloridesC
sludgeD
dissolved nitrogen
考题
单选题A dazzling white burner flame in the boiler furnace indicates （）.A
proper combustionB
water in the fuelC
excess airD
cold fuel oil
考题
单选题If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be （）A
a glazed surface on the springB
nicks in the protective coatingC
a build up of sludge depositsD
cracks in the surface of the spring
考题
单选题The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler （）A
steam demand is highB
salinity is highC
safety valve simmersD
burner flame is extinguished
考题
单选题The flame safeguard control system of a large automatic auxiliary boiler will provide fuel shut off in the case of high （）.A
waterB
voltageC
fuel pressureD
steam pressure
考题
单选题When there is a flame failure in an automatically fired auxiliary boiler, the （）.A
air supply is shut offB
fuel supply is shut offC
water supply is shut offD
safety valve lifts
考题
单选题A （） boiler is an auxiliary boiler sometimes included in a steamships installation for supplying steam to auxiliaries in port.A
monkeyB
donkeyC
waste heatD
main
考题
单选题Excessive vibration of an automatically fired auxiliary boiler can be caused by （）A
air or water in the furnaceB
combustion pulsesC
fuel oil pump failureD
flame failure
考题
单选题Ignition failure in an automatically controlled auxiliary boiler could be caused by（）A
carbon deposits on the flame scannerB
high fuel oil temperatureC
low fuel oil viscosityD
high steam pressure
考题
单选题After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate re-firing of a burner in order for the （）.A
furnace to be re-purgedB
electric charge to buildup in the igniterC
fuel pump to restartD
drum level to stabilize
考题
单选题A burner responsible for producing black smoke in an automatic auxiliary boiler, would be caused by a （）A
defective solenoid valveB
dirty fuel nozzleC
grounded high tension leadD
faulty ignition cable connector
考题
单选题Burner ignition failure in an automatically fired auxiliary boiler would be caused by（）A
a burned out solenoid in the oil supply valveB
high temperature excess airC
incorrectly setting the hot-well dump valveD
an incorrectly positioned burner snubber realy
考题
单选题Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）A
increased fuel consumptionB
increased feed water consumptionC
fuel pump failureD
combustion control system failure
考题
单选题Excessive alkalinity of the water in an auxiliary boiler can cause （）.A
caustic embrittlement of the boiler metalB
acidic corrosion of the boiler metalC
hard scale deposits on the boiler tubesD
etching of the heat exchange surfaces
考题
单选题Heavy soot accumulations in an auxiliary boiler could be caused by（）A
water in the fuel oilB
excessive cyclingC
high fuel oil pressureD
improper burner maintenance
考题
单选题Flame failure in an automatically fired auxiliary boiler can from a/an （）A
incorrect electrode settingB
incorrect nozzle positionC
clogged fuel nozzleD
broken high tension lead
考题
单选题After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate refiring of a burner in order for the （）.A
furnace to be re-purgedB
electric charge to buildup in the igniterC
fuel pump to restartD
dram level to stabilize
考题
单选题As for a oil-fired boiler too much air would indicated by （）.A
yellowish flameB
golden yellow flameC
milky flameD
brilliant white flame
考题
单选题A dazzling white burner flame in the boiler furnace indicates （）.A
no combustionB
deposits in the fuelC
excessive air in the fuelD
cold fuel oil
热门标签
最新试卷