Fuels and Combustion

Question: The calorific value is the highest out of the following for
[A].

producer gas

[B].

water gas

[C].

coke oven gas

[D].

blast furnace gas

Answer: Option C

Explanation:

No answer description available for this question.

Question: The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorifice value will be
[A].

y

[B].

0.95 y

[C].

1.05 y

[D].

1.8 y

Answer: Option A

Explanation:

No answer description available for this question.

Question: Coke compared to the coal from which it has been made, contains
[A].

less volatile matter.

[B].

more carbon.

[C].

greater percentage of ash.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: The calorific value of ‘LPG’ (50% propane + 50% butane) is about __________ kcal/Nm3.
[A].

5000

[B].

25, 000

[C].

10, 000

[D].

15, 000

Answer: Option B

Explanation:

No answer description available for this question.

Question: The calorific value of natural gas is about __________ kcal/Nm3.
[A].

10, 000

[B].

2500

[C].

25, 000

[D].

35, 000

Answer: Option A

Explanation:

No answer description available for this question.

Question: Main constituent of natural gas is
[A].

CH4 (upto 90%)

[B].

C2H6

[C].

C3H8

[D].

H2

Answer: Option A

Explanation:

No answer description available for this question.

Question: The calorific value of producer gas is around __________ kcal/Nm3
[A].

1300

[B].

500

[C].

4500

[D].

9000

Answer: Option A

Explanation:

No answer description available for this question.

Question: The calorific value of L.D. converter gas is about __________ Kcal/Nm3 .
[A].

1800

[B].

800

[C].

4500

[D].

10000

Answer: Option A

Explanation:

No answer description available for this question.

Question: L.D. converter gas (produced in steel plant) comprises mainly of
[A].

CO (upto 65%) & CO2

[B].

CO2 & H2

[C].

CO & O2

[D].

CO2 & O2

Answer: Option A

Explanation:

No answer description available for this question.

Question: Blast furnace gas compared to coke oven gas has
[A].

lower ignition temperature.

[B].

narrower limit of inflammability.

[C].

higher calorific value.

[D].

lower theoretical flame temperature.

Answer: Option D

Explanation:

No answer description available for this question.