违法和不良信息举报 联系客服
免费注册 登录

Water level controllers of the boiler must be kept operable

题目
单选题
Water level controllers of the boiler must be kept operable to protect external steam-using plant from water “（）” danger.
A

carry off

B

carry down

C

carry on

D

carry over

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 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2题：

what chemicals did you use to treat the boiler water ?when you test alkalinity and acidity of water in boiler by pH test paper ? the result shows the boiler water is in acidiity . please describe what the possible cause is .


正确答案：I have ever used the following brand chemicals :unitor , drew and so on . We should keep the boiler water’s ph scale between 10.5 and 11.5 . If the water become of acidity ( ph scale is below 10 ) ,it is may be caused by following reasons : The water has not been given enough blow down ,or has not been filled enough alkalinity chemicals

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
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5题：

If the sump ______were to rise this would indicate water leakage into the oil and an investigation into the cause must be made.

A.temperature

B.viscosity

C.lever

D.level


正确答案：D

第6题：

The water level showing in a boiler water gauge glass is usually ( ) duringworking.

A.higher than the actual drum water level

B.equal to the actual drum water level

C.increasing due to steam condensation in the glass

D.lower than actual drum wafer level


正确答案：D
解析：水位表上端通汽下端通水，温度不及炉内的高;炉内的炉水是水和汽泡的混合物，故其水位要高些。
译文：锅炉运行期间，水位计显示的水位比炉内的实际水位低。

第7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8题：

The water level in the gauge glass when a boiler is operating is _____ when the boiler is shut down.

A.lower than

B.higher than

C.below

D.equal to


正确答案：B

第9题：

单选题
You should frequently compare drum-mounted and remote-reading water level indicators（） between these have contributed to failures because of overheating through shortage of water, when a boiler was being oil-fired.
A

descriptions

B

discrepancies

C

different

D

deflections


正确答案： B
解析： 暂无解析

第10题：

单选题
Which of the following statements concerning the water tube and fire tube boilers is not true?（）
A

natural circulation of the water in the water tube boiler is better than that in the fire tube boiler

B

for the same output the water tube boiler will carry less mass of water compared with the fire tube boiler

C

the water tube boiler will cost shorter time for steam raising

D

the water tube boiler require lower skill in operating and maintaining


正确答案： D
解析： 暂无解析

更多相关问题
相关内容