Fuels and Combustion

Question: Bomb calorimeter is used for the determination of calorific value of the __________ fuels.
[A].

gaseous

[B].

solid

[C].

liquid

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.
[A].

colour

[B].

moisture content

[C].

ash content

[D].

volatile matter

Answer: Option D

Explanation:

No answer description available for this question.

Question: Compound coke ovens are those which can be heated by
[A].

both steam and electrical power.

[B].

lean gas (e.g., B.F. gas).

[C].

rich gas (e.g., coke oven gas).

[D].

both (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Main use of hard coke produced by high temperature carbonisation is in the
[A].

iron blast furnace

[B].

cupola in foundaries

[C].

sinter making

[D].

domestic ovens

Answer: Option A

Explanation:

No answer description available for this question.

Question: Coal containing large quantity of __________ are difficult to wash.
[A].

ash

[B].

inherent mineral matter

[C].

free impurities

[D].

volatile matter

Answer: Option B

Explanation:

No answer description available for this question.

Question: Insitu theory and drift theory are related to the
[A].

origin of petroleum oil.

[B].

origin of coal.

[C].

coalification.

[D].

variation of coal quality with depth.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.
[A].

550

[B].

750

[C].

950

[D].

1150

Answer: Option C

Explanation:

No answer description available for this question.

Question: While the first commercial low temperature coal carbonisation plant is located at Neyveli (in Chennai), the second such plant has been built at
[A].

Dankuni (West Bengal)

[B].

Dhanbad

[C].

Singreni (AP.)

[D].

Raniganj

Answer: Option A

Explanation:

No answer description available for this question.

Question: During its calorific value determination by bomb calorimeter, coal is combusted by
[A].

air

[B].

oxygen

[C].

oxygen enriched air

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.
[A].

500

[B].

750

[C].

950

[D].

1100

Answer: Option B

Explanation:

No answer description available for this question.