2751. Very __________ coals are completely devoid of cokability i.e, it is non coking.
Young
Mature
Both A & B
Neither A nor B
✅ The correct answer is option C.
Chemical Engineering
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2752. Which of the following is not used as a binder in coal briquetting?
Tar
Molasses
Pitch
Line
✅ The correct answer is option D.
2753. Gobar gas constitutes mainly of
CH₄ & CO₂
CO & CO₂
CH₄ & N₂
CO & N₂
✅ The correct answer is option A.
2754. Hard pitch is used for making
Pulverised fuel
Perfumes
Insecticides
Plastics
✅ The correct answer is option A.
2755. The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to
obviate catalyst poisoning.
maintain the reaction temperature.
sustain the reactor pressure.
hydrogenate the feed stock.
✅ The correct answer is option C.
2756. The coking process normally mostly used in Indian oil refineries is the __________ coking process.
delayed
flexi
fluid
contact
✅ The correct answer is option A.
2757. Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene.
Smoking tendency of hydrocarbons increases in the order : paraffins → isoparaffins → naphthenes → aromatics.
Smoking tendency of paraffins increases with decrease in its molecular weight.
Smoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond.
Smoking tendency of aromatics decreases with increase in its molecular weight.
✅ The correct answer is option B.
2758. The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol.
3
300
3000
1000
✅ The correct answer is option A.
2759. __________ determination is not a very significant and important test for gasoline.
Gum & sulphur content
Viscosity
Octane number
Reid vapor pressure
✅ The correct answer is option B.
2760. In flue gas analysis by Orsat’s apparatus, carbon monoxide is absorbed by
Cuprous chloride
Potassium hydroxide
Alkaline pyrogallol solution
None of these
✅ The correct answer is option A.