Micum Index of a coke is a measure of its

Desirable "Micum Index" values of metal-lurical coke are

A

[

A. M₄₀ > 78% and M₁₀

B. M₄₀ > 4% and M₁₀

B

M₄₀ > 10% and M₁₀

C

M₄₀ > 98% and M₁₀

Shatter index of the coke is a measure of its

A

Strength

B

Bulk density

C

Reactivity

D

None of these

In a group of 60 people, 27 like coke and 42 like borhani and each person likes at least one of the two drinks How many people like both coke and borhani?

A

9

B

129

C

69

D

15

Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.

A

Colour

B

Moisture content

C

Ash content

D

Volatile matter

Coke made in narrower by-product coke ovens (as compared to wider ovens) is

A

Less reactive

B

Stronger

C

Smaller in size

D

All of the above

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

Width of the coke oven towards coke side is slightly more than that on pusher side to

A

Facilitate easy discharging of coke as it swells during carbonisation

B

Facilitate uniform heating of the oven

C

Increase the output of the coke

D

None of these

Narrow coke ovens as compared to wider coke ovens

A

Produce smaller coke

B

Produce stronger coke

C

Require less time of carbonisation

D

All of the above

Critical Air Blast (CAB) value of coke is a direct measure of its

A

Reactivity

B

Hardness

C

Strength

D

None of these

Abrasion index of blast furnace coke should be around __________ percent.

A

20

B

35

C

80

D

55

Micum Index of a coke is a measure of its

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