Very high pressure boilers are usually _____________ boilers?

Question: Furnace pressure is normally controlled by regulating the
[A].

air pressure

[B].

fuel gas pressure

[C].

speed of I.D. fan

[D].

damper

Answer: Option D

Explanation:

No answer description available for this question.

Question: The amount of combustible escaping uncon-sumed from the furnace, depends upon the
[A].

air supplied and furnace temperature.

[B].

burner design (thoroughness of mixing versus stratification).

[C].

air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction).

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of
[A].

graphite powder

[B].

thoria

[C].

zircon powder

[D].

beryllium

Answer: Option C

Explanation:

No answer description available for this question.