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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 pressure
B
relight the fire off the brickwork as the bricks are cherry red
C
purge the furnace of any combustible gases before attempting to relight the fire
D
speed up the feed pump to prevent dry firing when the burner flame is reestablished
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更多 “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” 相关考题
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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
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单选题（） is provided to alternators, in the event of prime mover failure to ensure that the alternator does not act as a motor.A
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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
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in the event of a stack fireC
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单选题What happens on failure of a pre or post event script？（）A
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If configured， a recovery command will be run to deal with the problemC
An event error is generated and 3 minutes later the cluster will enter config_too_long stateD
An event error is generated and 6 minutes later the cluster will enter config_too_long state
考题
单选题In readying an auxiliary water-tube boiler for a routine hydrostatic test, which of the following procedures should be undertaken prior to filling the boiler with fresh water?（）A
The safety valve escape piping should be disconnected from the valve body and a blank insertedB
The boiler vent valves should be openedC
All hand-hole/manhole covers should be tightened up as much as possible to preclude any leaksD
All of the above
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The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）.A
operating the boiler at less than normal water levelB
installing fins on the firesides of water-tubesC
increasing the amount of excess air to the burnersD
treating the boiler water with chemical oxygen scavengers
考题
单选题In readying an auxiliary water-tube boiler for a routine hydrostatic test, which of the following procedures should be undertaken prior to filling the boiler with fresh water?（）A
The safety valve escape piping should be disconnected from the valve body and a blank insertedB
The boiler vent valves should be openedC
All handhole/manhole covers should be tightened up as much as possible to preclude any leaksD
All of the above
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（）A
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lubricating pipe lineC
auxiliary engine pipe lineD
generator output line
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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
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单选题The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler （）A
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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
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voltageC
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单选题Which of the following actions should normally be taken during each watch when the auxiliary boilers is in operation?（）A
clean the flame scanner photocell windowB
Inspect and clean all solenoid valvesC
lift the safety valves by handD
Inspect for oil or water leaks
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Bottom blow valves are installed on auxiliary water-tube boilers to （）A
completely drain the boiler in an emergencyB
prevent sludge from forming in the drumC
remove floating impurities from the boiler water surfaceD
remove settled solids from the water drum
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
名词解释题失效时间failure event
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