单项选择题
A.The boiler oil tank B.The steam pipe C.The fire side D.The safety valves
Foaming in the steam drum may be caused by （） in a boil...
单项选择题Foaming in the steam drum may be caused by （） in a boiler.
A.oxygen in the water B.poor boiler design C.density too high D.excessive steam demand
Too much air in the furnace of an oil-fired boiler woul...
单项选择题Too much air in the furnace of an oil-fired boiler would be indicated by （）.
A.yellowish flame B.golden yellow flame C.white flame D.brilliant white flame
The feed water to the boiler will comprise （）.A.condens...
单项选择题The feed water to the boiler will comprise （）.
A.condensate B.a small amount of make-up feed C.A and B D.None of the above
