Question: A good coking coal should have high __________ content.
[A].ash
sulphur & phosphorus
moisture
none of these
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Chemical Engineering
Fuel consumption in coke making can be reduced by
Question: Fuel consumption in coke making can be reduced by
[A].preheating, blending and de-ashing the coal.
stamped charging of coal.
dry quenching of coke.
all (a), (b) and (c).
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Narrow coke ovens as compared to wider coke ovens
Question: Narrow coke ovens as compared to wider coke ovens
[A].produce smaller coke.
produce stronger coke.
require less time of carbonisation.
all (a), (b) and (c).
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Coke having higher porosity has
Question: Coke having higher porosity has
[A].lower bulk density.
lower strength.
higher reactivity.
all (a), (b) and (c).
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Which will have the least volatile matter and hence will be the most difficult to ignite?
Question: Which will have the least volatile matter and hence will be the most difficult to ignite?
[A].Bituminous coal
Coke
Semi-bituminous coal
Aanthracite
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
With increase in moisture content of coal, its
Question: With increase in moisture content of coal, its
[A].calorific value increases.
caking properties diminish.
swelling during carbonisation becomes excessive.
none of these.
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Width of the coke oven towards coke side is slightly more than that on pusher side to
Question: 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.
facilitate uniform heating of the oven.
increase the output of the coke.
none of these.
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
During the carbonisation of coal
Question: During the carbonisation of coal
[A].all tar is evolved at < 600°C.
evolution of H2 and formation of methane and aromatics occur at > 700°C.
hard semi-coke starts shrinking at 600°C.
all (a), (b) and (c).
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Low temperature carbonisation
Question: Low temperature carbonisation
[A].is mainly for producing the smokeless domestic coke.
is meant for the production of ‘metallurgical coke’.
produces higher quantity of gas than high temperature carbonisation.
produces less quantity of tar than high temperature carbonisation.
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
In high temperature carbonisation of coal compared to low temperature carbonisation
Question: In high temperature carbonisation of coal compared to low temperature carbonisation
[A].yield of ammonia is less.
aromatic content of tar is low.
H2 content in the coke oven gas is more.
calorific value of the coke oven gas is lower.
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.