Auto catalytic
Exothermic
Endothermic
None of these
✅ The correct answer is option B.
Engineering
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3312. Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the
Hot scarfing of steel slabs
Mixing with blast furnace gas
Coke oven battery heating
Steel ladle drying
✅ The correct answer is option C.
3313. Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.
Hydrogenation
Gasification
Carbonisation
None of these
✅ The correct answer is option A.
3314. Alumina-graphite bricks are used for lining the
slide gate in teeming laddies.
continuous casting systems.
both (a) and (b).
neither (a) nor (b).
✅ The correct answer is option C.
3315. Which of the following is not a by-product fuel?
Producer gas
Blast furnace gas
Coke oven gas
Refinery gas
✅ The correct answer is option A.
3316. Roof of a basic electric furnace is made of __________ bricks.
superduty fireclay
silica
chromite
none of these
✅ The correct answer is option B.
3317. With increase in the density of silica refractories, its
resistance to slag attack increases.
spalling resistance reduces.
both (a) and (b).
neither (a) nor (b).
✅ The correct answer is option C.
3318. Which of the following is a rich fuel gas?
Producer gas
Coal gas from underground gasification of coal
Refinery gases
None of these
✅ The correct answer is option C.
3319. Bomb calorimeter can be used to determine the __________ of the coal.
Sulphur content
Calorific value
Both A & B
Neither A nor B
✅ The correct answer is option C.
3320. Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.
1kg mole
22.4 Nm³
32 kg
All of the above
✅ The correct answer is option D.