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
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


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单选题The most common cause of scale formation in an auxiliary boiler is ()Aconcentrations of calcium sulfate in the boiler waterBfuel oil in the feed waterCimproper treatment of the feed water with calcium sulfateDexcessive feed water alkalinity

单选题The water level of an exhaust gas boiler which is independent of the auxiliary boiler and just as the extra heating surface of it ()Awill be modulated in proportionBwill be modulated in proportion and integralCwill be modulated in proportion and differentialDwill not be modulated at all

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单选题A distorted furnace in a fire-tube auxiliary boiler may be the result of ()Afiring for extended periods in the low fire modeBoverheating, due to waterside depositsCvarying the water level above the crown sheetDcarrying excessive alkalinity in the boiler water

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单选题The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler ()Asalinity is abnormally highBsteam demand is too highCwater level is abnormally lowDfeedwater flow is low

单选题The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler ()Asteam demand is highBsalinity is highCsafety valve simmersDburner flame is extinguished

单选题Which one is not the normal operation for boiler shutdown?()ACarry out soot blowing if permissibleBChange fuel supply to diesel oilCClose steam stop valves on boiler when pressure is reducedDDrain boiler empty when it has cooled down

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单选题The water in an auxiliary boiler should be tested for chloride content to determine ().Atotal dissolved solidsBsalt contaminationCwater hardnessDchlorine contamination

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Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?()AIncreased suction head pressureBDecreased feedwater temperatureCPump recirculating line being open too muchDExcessive feedwater temperature

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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

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单选题The water in an operating auxiliary boiler should be tested for alkalinity and chloride content each().AhourBdayCweekDmonth