2874. The characterisation factor of a crude oil is calculated as 12.5. It means that; it is
paraffinic
naphthenic
intermediate
none of these
✅ The correct answer is option A.
2869. Coke ovens in steel plant are heated by
Electricity
Coke oven gas
Mixed gas
Both B & C
✅ The correct answer is option D.
2842. Preheating of __________ the flame temperature.
The gaseous fuel before combustion decreases
Combustion air decreases
Either the fuel or the air or both, increases
Either the fuel or the air does not affect
✅ The correct answer is option C.
2848. Which of the following is a single stage, fixed bed high pressure coal gasification process?
Winkler process
Kopper-Totzek process
Lurgi Process
None of these
✅ The correct answer is option C.
2853. Undercharging of coal in the by-product coke ovens results in
Decrease in the c.v. of coke oven gas
Increase in its throughput
Increase in the c.v. of coke oven gas
No change in the c.v. of coke oven gas
✅ The correct answer is option A.
2860. Blast furnace gas constitutes mainly of
N₂ & CH₄
N₂ & H₂
N₂ & CO
CH₄ & CO₂
✅ The correct answer is option C.
2865. Most of the coking coals are
Anthracite
Bituminous
Lignite
None of these
✅ The correct answer is option B.
2834. By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of
Tar
Benzol
Ammonia
None of these
✅ The correct answer is option C.
2838. Calorific value of tar is about __________ Kcal/kg.
8800
12000
5000
16000
✅ The correct answer is option A.
2843. Caking index of coal blend used for blast furnace coke making is about
8
12
22
36
✅ The correct answer is option C.