Chemical Engineering

Question: Heat transfer rate to the stock/charge in the furnace does not depend upon the
[A].

emissivity of the refactory walls.

[B].

size of the furance.

[C].

use of waste heat recovery equipments.

[D].

thickness of the stock.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Cement Kiln is a
[A].

rotary Kiln

[B].

tunnel Kiln

[C].

natural draft furnace

[D].

batch furnace

Answer: Option A

Explanation:

No answer description available for this question.

Question: Calcination of limestone to produce lime is done in a __________ kiln.
[A].

tunnel

[B].

rotary

[C].

vertical shaft

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ atmosphere is maintained inside an iron blast furnace.
[A].

Oxidising

[B].

Reducing

[C].

Inert

[D].

Decarburising

Answer: Option B

Explanation:

No answer description available for this question.

Question: Air filtration in a furnace
[A].

reduces its thermal efficiency.

[B].

is indicated by flame sting out.

[C].

increases the flue gas temperature.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Fuel economy in furnaces can be achieved by
[A].

using oxygen enriched combustion air.

[B].

preheating the combustion air.

[C].

reducing the heat loss through furnace openings & doors.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Ceramic recuperators compared to metallic recuperators for the same duty
[A].

are lighter.

[B].

occupy more space.

[C].

are less costly.

[D].

have higher pressure differential between flue gas & air side.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Advantages of use of preheated combustion air are
[A].

saving in fuel consumption.

[B].

reduction in scale losses.

[C].

increase in flame temperature.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.
[A].

< 2

[B].

< 5

[C].

< 8

[D].

< 10

Answer: Option A

Explanation:

No answer description available for this question.

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

blast furnace stoves

[B].

blast furnace

[C].

coke oven heating chamber

[D].

rotary kilns

Answer: Option A

Explanation:

No answer description available for this question.