Combustion reaction of fuels is a/an ______________ reaction?

Question: With increase in the temperature of carbonisation of coal
[A].

hydrogen content of coke oven gas increases due to cracking of hydrocarbons.

[B].

methane content in the coke oven gas decreases and carbon monoxide content increases.

[C].

calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H2 content.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around __________ percent.
[A].

4

[B].

96

[C].

20

[D].

40

Answer: Option C

Explanation:

No answer description available for this question.

Question: Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.
[A].

1000

[B].

4000

[C].

8000

[D].

15000

Answer: Option C

Explanation:

No answer description available for this question.

Question: Bunsen burner is an example of a/an __________ burner.
[A].

inside mixing/premix type

[B].

outside mixing/diffusion flame/nozzle mix type.

[C].

rotary cup.

[D].

submerged combustion.

Answer: Option A

Explanation:

No answer description available for this question.