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
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
参考答案
参考解析
解析：
暂无解析
更多 “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” 相关考题
考题
The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler()
A.salinity is abnormallyB.high steam demand is tooC.feed-water flow is lowD.water level is abnormally low
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
When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.A.increase the fuel oil temperatureB.decrease the fuel oil temperatureC.decrease the fuel oil supply pressureD.increase the air supply
考题
单选题When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）A
cold fuel oilB
low fuel oil pressureC
low atomizing steam pressureD
water in the fuel oil
考题
单选题The most common cause of scale formation in an auxiliary boiler is （）A
concentrations of calcium sulfate in the boiler waterB
fuel oil in the feed waterC
improper treatment of the feed water with calcium sulfateD
excessive feed water alkalinity
考题
单选题The purpose of the safety relief valves installed on an auxiliary boiler is to （）.A
relieve excess fuel oil pressure during the “off” fire cycleB
admit water to the dry pipeC
throttle the forced draft fan output for proper combustionD
reduce excess steam pressure in the boiler
考题
单选题If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?（）A
Move the fuel control mechanism to the no fuel positionB
Block the fuel supply by closing the master fuel valveC
Shut off the fuel supply and block the flow of intake airD
Relieve all pressure in the fuel system
考题
单选题Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）A
an increased flash pointB
higher lube oil pressuresC
an increased viscosityD
lower lube oil pressures
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When an auxiliary boiler is panting and emitting black smoke, you should （）.A
increase the fuel oil temperatureB
decrease the fuel oil temperatureC
decrease the fuel oil supply pressureD
increase the air supply
考题
单选题When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.A
filter to remove the fuel oilB
use the settler to remove the fuel oilC
remove the fuel oil by centrifugingD
drain and then renew the lube oil supply
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
考题
单选题The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler （）A
salinity is abnormally highB
steam demand is too highC
water level is abnormally lowD
feedwater flow is low
考题
单选题Which one is not the normal operation for boiler shutdown?（）A
Carry out soot blowing if permissibleB
Change fuel supply to diesel oilC
Close steam stop valves on boiler when pressure is reducedD
Drain boiler empty when it has cooled down
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Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）A
double bottom fuel oil tank temperatureB
heater supply steam flowC
pressure of the fuel supplied to the burnersD
attemperator steam flow in the heater discharge circuit
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The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.A
fuel treatmentB
fuel combustionC
fuel injectionD
fuel separating
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When the incinerator is stopped, which of the following is wrong?（）A
After stopping supplying sludge oil, the value and pipe should be flushed by flushed by diesel oil and the incinerator continue burning for 10 minutesB
Close auxiliary burner firstly and then close main burnerC
After stopping fuel, restoring the position of main fuel supply valveD
Stop blower as soon as stopping supplying fuel oil
考题
单选题A donkey boiler is （）.A
one to supply steam to the main propulsion turbineB
an auxiliary boilerC
A and BD
neither A nor B
热门标签
最新试卷
