Chemical Engineering

Question: In low or standard frequency induction furnace, heat is produced by the
[A].

combination of induced current and skin effect.

[B].

induction and resistance.

[C].

current flow through a heating element.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
[A].

resistance

[B].

arc

[C].

low frequency induction

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Ingress of cold air in the furnaces through cracks, charging doors, openings etc.
[A].

reduces the flue gas temperature and makes the furnace atmosphere oxidising.

[B].

increases the load on the induced draft fan.

[C].

reduces the furnace draught.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a muffle furnace, the muffle
[A].

retards the heat transfer.

[B].

assists in temperature equalisation in the charge.

[C].

permits the use of controlled atmosphere for the protection of stock.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Example of an indirectly heated furnace is
[A].

hood annealing furnace

[B].

muffle furnace

[C].

both (a) and (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: A refractory wall separating the stock and the source of heat is provided in a
[A].

updraft kiln

[B].

muffle furnace

[C].

continuous furnace

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In producer gas making furnace, steam is added along with air to mainly control the
[A].

fusion of coal ash & clinker formation.

[B].

C. V. of producer gas.

[C].

temperature of producer gas.

[D].

tar content in producer gas.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In which of the following furnaces, the gases are sucked through the stock bed from below?
[A].

Soaking pit

[B].

Sintering machine

[C].

Beehive oven

[D].

None of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the
[A].

physical nature, ash content and fineness of the coal.

[B].

amount of excess air supplied and load on the boiler.

[C].

type of burner and combustion chamber.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the
[A].

quantity & temperature of waste gas.

[B].

dust concentration & nature of dust in waste gas.

[C].

corrosive nature of the waste gas.

[D].

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

Answer: Option B

Explanation:

No answer description available for this question.