单选题Burner ignition failure in an automatically fired auxiliary boiler would be caused by（）Aa burned out solenoid in the oil supply valveBhigh temperature excess airCincorrectly setting the hot-well dump valveDan incorrectly positioned burner snubber realy
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 valve
B
high temperature excess air
C
incorrectly setting the hot-well dump valve
D
an incorrectly positioned burner snubber realy
参考解析
解析：
暂无解析
相关考题：
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
A firebox explosion in an automatically fired auxiliary boiler may be the result of ______.A.excessive purging before lighting offB.insufficient trail for ignition periodC.a faulty transformer in the ignition circuitD.insufficient purging before lighting off
All of the followings are the detainable deficiencies under the SOLAS Convention except ______.A.failure of proper operation of propulsion and other essential machinery, as well as electrical installationB.failure of the proper operation of the main and auxiliary steering gearC.failure of engineering watch arrangements to conform to the requirements specified for the ship by AdministrationD.failure of the proper operation of emergency generator, lighting, batteries and switches
How does foam extinguish an oil fire ?______.A.By cooling the oil below the ignition temperatureB.By removing the fuel souce from the fireC.By excluding the oxygen from the fireD.By increasing the weight of the oil
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（）Ain the event of a flame failureBin the event of a stack fireCwhen the water level reach the crown sheetDwhen the feed pump discharge pressure drops to a preset minimum
单选题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 incineratorAⅠ+ⅡBⅠ+ⅢCⅡ+ⅢDⅠ+Ⅱ+Ⅲ
单选题In the event of a flame failure in an auxiliary water-tube boiler, you must（）Arelight the boiler immediately to prevent loss of steam pressureBrelight the fire off the brickwork as the bricks are cherry redCpurge the furnace of any combustible gases before attempting to relight the fireDspeed up the feed pump to prevent dry firing when the burner flame is reestablished
单选题A smoking burner with a pulsating flame in auxiliary boiler, is an indication that the（）Afuel oil supply temperature is normalBburner electrode is incorrectly positionedCfuel／air ratio is incorrectDignition current is too low
单选题Improper maintenance of an automatic auxiliary boiler oil burner could result in （）.Afuel pump failureBfan motor failureCincreased feedwater consumptionDdecreased boiler efficiency
单选题During waste clothes being charged into an incinerator, the auxiliary burner（）.Ashould be stopped manuallyBkeeps the combustion as usualCwould be cut off by an interlockDwould replace the waste oil burner and keep going on
单选题Failure of the burner flame in an auxiliary boiler would probably be a result of（）Awater in the fuel oilBbroken high tension leadsCincorrect electrode settingDfull fuel pressure at the nozzle
单选题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 rubbishAⅠ+Ⅱ+Ⅲ+ⅤBⅠ+Ⅱ+Ⅲ+ⅣCⅠ+Ⅳ+Ⅴ+ⅥDⅠ+Ⅱ+Ⅲ+Ⅵ
单选题In the event of failure of an auxiliary such as a lubricating pump, the standby pump is started and put on the line automatically“the line” in this sentence refers to（）Afuel manifoldBlubricating pipe lineCauxiliary engine pipe lineDgenerator output line
单选题The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to（）Acool the furnace to prevent pre-ignitionBremove explosive vapors from the furnaceCevaporate accumulated unburned fuel oilDprovide sufficient air in the furnace to allow ignition of the fuel
单选题A firebox explosion in an automatically fired auxiliary boiler may be the result of （）Aexcessive purging before lighting offBinsufficient trail for ignition periodCa faulty transformer in the ignition circuitDinsufficient purging before lighting off
单选题Failure to provide _____ explanations for his frequent blunders, this young man was fired.ArationalBsentimentalCeccentricDskeptical
单选题When there is a flame failure in an automatically fired auxiliary boiler, the （）.Aair supply is shut offBfuel supply is shut offCwater supply is shut offDsafety valve lifts
单选题Excessive vibration of an automatically fired auxiliary boiler can be caused by （）Aair or water in the furnaceBcombustion pulsesCfuel oil pump failureDflame failure
单选题Ignition failure in an automatically controlled auxiliary boiler could be caused by（）Acarbon deposits on the flame scannerBhigh fuel oil temperatureClow fuel oil viscosityDhigh steam pressure
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 （）.Afurnace to be re-purgedBelectric charge to buildup in the igniterCfuel pump to restartDdrum level to stabilize
单选题A burner responsible for producing black smoke in an automatic auxiliary boiler, would be caused by a （）Adefective solenoid valveBdirty fuel nozzleCgrounded high tension leadDfaulty ignition cable connector
单选题Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）Aincreased fuel consumptionBincreased feed water consumptionCfuel pump failureDcombustion control system failure
单选题Heavy soot accumulations in an auxiliary boiler could be caused by（）Awater in the fuel oilBexcessive cyclingChigh fuel oil pressureDimproper burner maintenance
单选题Flame failure in an automatically fired auxiliary boiler can from a/an （）Aincorrect electrode settingBincorrect nozzle positionCclogged fuel nozzleDbroken high tension lead
单选题Prior to lighting off a cold automatically fired auxiliary boiler, you should （）.Acheck and regulate the water levelBclose the air cock once fires are litCblowdown the gage glassDcrack the steam stop to assure protective steam flow
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 （）.Afurnace to be re-purgedBelectric charge to buildup in the igniterCfuel pump to restartDdram level to stabilize
单选题The furnace of an oil fired boiler should be （） before the operating burner is lit.Afilled with waterBpurgedCcleared of airDNone of the above is true