Number of macrocomponents present in coal according to Stopes are ___________________?

Question: Coals used for the generation of producer gas should have
[A].

high caking index.

[B].

low fusion point of ash.

[C].

high volatile matter content.

[D].

very low ash content (8-10%).

Answer: Option C

Explanation:

No answer description available for this question.

Question: Yield of charcoal in high temperature carbonisation of wood is about __________ percent.
[A].

10

[B].

25

[C].

50

[D].

75

Answer: Option B

Explanation:

No answer description available for this question.

Question: Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm3/ton coal (ash = 35%).
[A].

150

[B].

1500

[C].

3500

[D].

5000

Answer: Option B

Explanation:

No answer description available for this question.

Question: During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.
[A].

density

[B].

porosity

[C].

electrical resistivity

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.