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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

题目

A firebox explosion in an automatically fired auxiliary boiler may be the result of ______.

A.excessive purging before lighting off

B.insufficient trail for ignition period

C.a faulty transformer in the ignition circuit

D.insufficient purging before lighting off

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相似问题和答案

第1题：

A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.

A.corrosion at low engine loads

B.erosion at high engine loads

C.overload at high engine loads

D.scaling at all exhaust temperatures


正确答案：A

第2题：

单选题
Auxiliary diesel engines can be automatically shut down as a result of （）
A

low lube oil temperature

B

low lube oil pressure

C

high exhaust temperature

D

high cooling water pressure


正确答案： C
解析： 暂无解析

第3题：

The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler()

A.salinity is abnormally

B.high steam demand is too

C.feed-water flow is low

D.water level is abnormally low


答案：D

第4题：

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


正确答案： D
解析： 暂无解析

第5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 failure

B

in the event of a stack fire

C

when the water level reach the crown sheet

D

when the feed pump discharge pressure drops to a preset minimum


正确答案： D
解析： 暂无解析

第6题：

The brickwork surrounding the firebox of a boiler is known as ______．

A.Refractory

B.The screen wall

C.The water wall

D.Fire plate


正确答案：A

第7题：

单选题
The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.
A

seawater contamination

B

frequent surface blows

C

dissolved oxygen deaeration

D

frequent bottom blows


正确答案： B
解析： 暂无解析

第8题：

If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause may be ______.

A.high steam pressure in the boiler

B.abnormally high feed-water temperature

C.abnormally high boiler water temperature

D.steam demand exceeding feed pump capacity


正确答案：B

第9题：

单选题
Improper maintenance of an automatic auxiliary boiler oil burner could result in （）.
A

fuel pump failure

B

fan motor failure

C

increased feedwater consumption

D

decreased boiler efficiency


正确答案： B
解析： 暂无解析

第10题：

单选题
A distorted furnace in a fire-tube auxiliary boiler may be the result of （）
A

firing for extended periods in the low fire mode

B

overheating, due to waterside deposits

C

varying the water level above the crown sheet

D

carrying excessive alkalinity in the boiler water


正确答案： C
解析： 暂无解析

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