Chemical Engineering - Fuels and Combustion

46. 

By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of

A. tar
B. benzol
C. ammonia
D. none of these

Answer: Option C

Explanation:

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47. 

Naphthalene is removed from coke oven gas by

A. scrubbing with wash oil (a petroleum product).
B. adsorbing on bog iron bed.
C. absorbing in vetro-coke solution.
D. none of these.

Answer: Option A

Explanation:

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48. 

Coke oven gas compared to blast furnace gas is

A. more explosive and inflammable.
B. less poisonous.
C. lighter.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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49. 

Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind ?

A. 50
B. 70
C. 85
D. 100

Answer: Option D

Explanation:

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50. 

Which is the heaviest fuel gas out of the following ?

A. Blast furnace gas
B. Coke oven gas
C. Water gas
D. Carburetted water gas

Answer: Option A

Explanation:

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