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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.

Question: Decarburisation of steel
[A].

is the removal of carbon from iron carbide (Fe3C).

[B].

affects its crystalline structure.

[C].

is favoured by CO2.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: In order to maintain a reducing atmosphere in a furnace, it should have
[A].

no O2 in flue gas

[B].

CO in flue gas

[C].

high excess air

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In order to maintain an oxidising atmosphere in a furnace, it should have
[A].

more of excess air

[B].

less of excess air

[C].

more of CO in flue gas

[D].

more of CO2 in flue gas

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the
[A].

Ostwald chart

[B].

Cox chart

[C].

Sankey diagram

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.