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Question: Coke oven gas is stripped of its H2S and mercaptans content by
[A].

absorption in wash oil.

[B].

adsorption on bog iron bed.

[C].

bubbling it through dilute sulphuric acid.

[D].

adsorption on silica gel.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Main constituents of benzol are
[A].

benzene, toluene & xylene.

[B].

tar & creosote.

[C].

ammonia & phenol.

[D].

anthracene & phenol.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Ionisation potential applied across the electrodes of electrostatic tar precipitator is around
[A].

230 V AC

[B].

60 KV AC

[C].

230 V DC

[D].

60 KV DC

Answer: Option D

Explanation:

No answer description available for this question.

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: Caking index of a coal is a measure of its
[A].

abradability

[B].

reactivity

[C].

agglutinating (binding) properties

[D].

porosity

Answer: Option C

Explanation:

No answer description available for this question.

Question: Height of coke oven is limited (say maximum upto 7 metres) mainly by the
[A].

problem of uniform heating along its height.

[B].

structural strength of silica bricks.

[C].

problem in door cleaning.

[D].

buckling of ram of pusher car at the time of coke pushing.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gray King Assay and Swelling Index of a coal is a measure of its
[A].

swelling characteristics.

[B].

abradability.

[C].

agglutinating properties.

[D].

resistance to impact breakage.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Abrasion index of blast furnace coke should be around __________ percent.
[A].

20

[B].

35

[C].

55

[D].

80

Answer: Option D

Explanation:

No answer description available for this question.