Furnace Technology

Question: In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the
[A].

rate of firing and emissivity of flame.

[B].

thermal conductivity of the charge & structural materials of furnace.

[C].

nature of process ; whether batch, continuous or intermittant.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Forced recirculation of furnace gases is practised
[A].

to increase heat transfer by convection.

[B].

to ensure uniform temperature.

[C].

in furnaces, operating below 750°C.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: In reverberatory furnace, charge is heated mainly by
[A].

conduction.

[B].

natural convection.

[C].

radiation of heat from the roof of the combustion chamber.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Fuel used in B.F. stove is
[A].

pulverised coal

[B].

furnace oil

[C].

blast furnace gas/mixed gas

[D].

coke oven gas

Answer: Option C

Explanation:

No answer description available for this question.

Question: Blast furnace stoves are meant for heating
[A].

air

[B].

blast furnace gas

[C].

steam

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Operation of blast furnace stove is based on the principles of a __________ furnace.
[A].

regenerative

[B].

recuperative

[C].

both (a) and (b)

[D].

neither (a) nor (b).

Answer: Option A

Explanation:

No answer description available for this question.

Question: Means for giving direction to the circulation of gases in furnaces are
[A].

fans.

[B].

arrangement of heating stock in the furnaces.

[C].

location of outlet ports and heating & combustion devices.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Circulation of gases in furnace is caused by the
[A].

change in volume during a change of temperature.

[B].

difference in density between hot and cold gases.

[C].

furnace pressure in conjunction with draft in flues.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Main gas valve in a gaseous fuel burner is a __________ valve.
[A].

gate

[B].

butterfly

[C].

globe

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Furnace aerodynamics is related to the __________ in the furnace.
[A].

movement of gases

[B].

measurement of flue gas volume

[C].

temperature control

[D].

pressure adjustment

Answer: Option A

Explanation:

No answer description available for this question.