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

Question: __________ has the widest inflammability limit (explosion limit) of all the gases.
[A].

Hydrogen

[B].

Carbon monoxide

[C].

Acetylene

[D].

Methane

Answer: Option C

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: Coal is pulverised before burning in large capacity boiler furnaces mainly to
[A].

ensure its complete combustion.

[B].

facilitate easy ash removal.

[C].

enhance its calorific value.

[D].

provide trouble free operation.

Answer: Option A

Explanation:

No answer description available for this question.