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CHEMICAL ENGINEERING

The advantage of firing pulverised coal in the furnace lies in the fact, that it

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: The advantage of firing pulverised coal in the furnace lies in the fact, that it
[A].

permits the use of high ash content coal.

[B].

permits the use of low fusion point ash coal.

[C].

accelerates the burning rate and economises on fuel combustion.

[D].

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

Answer: Option C

Explanation:

No answer description available for this question.

The advantage of firing pulverised coal in the furnace lies in the fact, that it Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of
[A].

transportation of coal.

[B].

drying of coal.

[C].

combustion of coal by supplying it around the burner.

[D].

preheating the primary air.

Answer: Option C

Explanation:

No answer description available for this question.

In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.
[A].

hydrogenation

[B].

gasification

[C].

carbonisation

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal. Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

“Overfire burning” in a furnace is a phenomenon characterised by the

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: “Overfire burning” in a furnace is a phenomenon characterised by the
[A].

supply of excess fuel.

[B].

supply of excess air.

[C].

burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

“Overfire burning” in a furnace is a phenomenon characterised by the Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of
[A].

less air for combustion.

[B].

correct amount of air for combustion.

[C].

too much air for combustion.

[D].

pulverised coal in boilers.

Answer: Option C

Explanation:

No answer description available for this question.

Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of Read More »

CHEMICAL ENGINEERING, Fuels and Combustion

For maximum discharge through a chimney, its height should be

CHEMICAL ENGINEERING, Fuels and Combustion /
Question: For maximum discharge through a chimney, its height should be
[A].

200 meters.

[B].

infinitely long.

[C].

more than 105.7 metres.

[D].

equal to the height of the hot gas column producing draught.

Answer: Option D

Explanation:

No answer description available for this question.

For maximum discharge through a chimney, its height should be Read More »

CHEMICAL ENGINEERING, Fuels and Combustion