One of the main purposes of refractories in a boiler furnace is to()
Too much air in the furnace of an oil-fired boiler would be indicated by ().
A distorted furnace in a fire-tube auxiliary boiler may be the result of ()
Too much air in the furnace of an oil-fired boiler would be indicated by ().
The furnace of an oil fired boiler should be () before the operating burner is lit.
The defective places in the furnace () with fire bricks.
The defective places in the furnace () with fire bricks.
One of the main purposes of refractories in a boiler furnace is to()
In a () boiler the hot gases from the furnace pass through the tubes while the water is on the outside.
In a () boiler the hot gases from the furnace pass through the tubes while the water is on the outside.