Question: Abrasion index of blast furnace coke should be around __________ percent.
[A].20
35
55
80
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Chemical Engineering
Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.
Question: Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.
[A].2.5
0.5
10
20
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
In high temperature carbonisation (as compared to low temperature carbonisation) of coal
Question: In high temperature carbonisation (as compared to low temperature carbonisation) of coal
[A].coke oven gas yield is more.
tar yield is less but free carbon in tar is more.
calorific value of coke oven gas is less.
all (a), (b), and (c).
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Desirable “Micum Index” values of metal-lurical coke are
Question: Desirable “Micum Index” values of metal-lurical coke are
[A].M40 > 78% and M10 < 10%.
M40 > 4% and M10 < 80%.
M40 > 10% and M10 < 78%.
M40 > 98% and M10 < 2%.
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
“Micum Index” of a coke is a measure of its
Question: “Micum Index” of a coke is a measure of its
[A].reactivity.
porosity.
bulk density.
hardness & strength.
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Critical Air Blast (CAB) value of coke is a direct measure of its
Question: Critical Air Blast (CAB) value of coke is a direct measure of its
[A].reactivity
hardness
strength
none of these
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Caking index of the coal blend used for the manufacture of metallurgical coke should be around
Question: Caking index of the coal blend used for the manufacture of metallurgical coke should be around
[A].5
21
40
48
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Beehive coke oven
Question: Beehive coke oven
[A].facilitates by-products recovery.
takes 2-3 days for coking of coal but requires no external fuel for heating.
gives larger yield of coke (around 85%) as compared to by-product ovens.
produces coke with very poor strength.
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Coking time in narrow by-product coke ovens is around __________ hours.
Question: Coking time in narrow by-product coke ovens is around __________ hours.
[A].18
48
8
80
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
A coal having high volatile matter content will
Question: A coal having high volatile matter content will
[A].give less yield of tar and gas on carbonisation.
burn with a small non-smoky flame.
have a very high calorific value.
none of these.
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.