违法和不良信息举报 联系客服
免费注册 登录

When an auxiliary boiler is panting and emitting black smoke

题目
单选题
When an auxiliary boiler is panting and emitting black smoke, you should （）.
A

increase the fuel oil temperature

B

decrease the fuel oil temperature

C

decrease the fuel oil supply pressure

D

increase the air supply

如果没有搜索结果或未解决您的问题，请直接 联系老师 获取答案。
相似问题和答案

第1题：

The boiler water alkalinity in a coil-type auxiliary boiler should be maintained at the pH recommended by the boiler manufacturer to______.

A.precipitate(使沉淀) silica （硅石）from solution

B.reduce corrosion in the heating coil

C.prevent clogging and erosion in the coil

D.maintain zero water hardness


正确答案：B

第2题：

单选题
When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）
A

cold fuel oil

B

low fuel oil pressure

C

low atomizing steam pressure

D

water in the fuel oil


正确答案： C
解析： 暂无解析

第3题：

The correct procedure for giving an auxiliary boiler a bottom blow, is to begin .

A.when the boiler has been secured long enough for most solids to settle

B.when the boiler has been cooled to ambient temperature

C.only after raising the water level to within 0.5 inch of the high water cutout only

D.after bypassing the low pressure


正确答案：A

第4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 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


正确答案： C
解析： 暂无解析

第5题：

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 （）
A

will be modulated in proportion

B

will be modulated in proportion and integral

C

will be modulated in proportion and differential

D

will not be modulated at all


正确答案： C
解析： 暂无解析

第6题：

When an auxiliary boiler is panting and emitting(发出) black smoke, you should______.

A.increase the fuel oil temperature

B.decrease the fuel oil temperature

C.decrease the fuel oil supply pressure

D.increase the air supply


正确答案：D

第7题：

单选题
The most common cause of scale formation in an auxiliary boiler is （）
A

concentrations of calcium sulfate in the boiler water

B

fuel oil in the feed water

C

improper treatment of the feed water with calcium sulfate

D

excessive feed water alkalinity


正确答案： C
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
Black smoke coming from a boiler can be caused by （）.
A

low water level

B

high water level

C

excessively high fuel pressure

D

low oil temperature


正确答案： B
解析： 暂无解析

第10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 level

B

installing fins on the firesides of water-tubes

C

increasing the amount of excess air to the burners

D

treating the boiler water with chemical oxygen scavengers


正确答案： B
解析： 暂无解析

更多相关问题
相关内容