Furnace Technology

Question: Dampers are located
[A].

before the I.D fan

[B].

after the I.D. fan

[C].

near the top of the chimney

[D].

anywhere after the I.D. fan

Answer: Option A

Explanation:

No answer description available for this question.

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: In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time ?
[A].

Recuperator

[B].

Regenerator

[C].

Waste heat boiler

[D].

None of these

Answer: Option B

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: Ostwald charts are meant for
[A].

computing the excess/deficiency of combustion air.

[B].

calculation of flue gas temperature.

[C].

computation of flue gas analysis.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Maximum thermal efficiency of boiler may be about __________ percent.
[A].

10

[B].

25

[C].

65

[D].

90

Answer: Option D

Explanation:

No answer description available for this question.

Question: In salt bath furnace, heat is transferred to the charge mainly by
[A].

conduction

[B].

convection

[C].

radiation

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.
[A].

premix

[B].

outside mixing type

[C].

rotary

[D].

diffusion

Answer: Option A

Explanation:

No answer description available for this question.

Question: Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an
[A].

blast furnace.

[B].

steam boiler.

[C].

salt bath furnace.

[D].

annealing furnace.

Answer: Option C

Explanation:

No answer description available for this question.

Question: An example of recuperative furnace is the
[A].

soaking pit

[B].

open hearth furnace

[C].

coke ovens

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.