petrol
diesel
water
crude petroleum
✅ The correct answer is option C.
Engineering
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2902. Clay treatment of petroleum products
decolorises & stabilises cracked gasoline.
desulphurise straight run gasoline & kerosene.
adsorb arsenic from feedstock to catalytic reforming.
all (a), (b) & (c).
✅ The correct answer is option D.
2903. Which of the following is an additive used for improving the cetane number of diesel ?
Tetraethyl lead
Tetramethyllead
Ethyl nitrate or acetone
None of these
✅ The correct answer is option A.
2904. Aniline point of high speed diesel may be about __________ °C.
35
70
105
150
✅ The correct answer is option B.
2905. True boiling point apparatus is used for the
determination of characterisation factor.
evaluation of oil stocks.
determination of true vapour pressure.
none of these.
✅ The correct answer is option B.
2906. Mercaptans is represented as (where R and R’ are alkyl groups)
R-COOH
R-S-H
R-S-R
R-S-R’
✅ The correct answer is option B.
2907. Water separometer index (modified) (WSIM) of a petrofuel is the measure of its
emulsification tendency.
water separation characteristics.
water content.
water absorbing capacity from atmosphere.
✅ The correct answer is option B.
2908. Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API) ?
Diesel
Gasoline
Atmospheric gas oil
Vacuum gas oil
✅ The correct answer is option B.
2909. Soft coke is not
Produced by low temperature carbonisation of coal
A domestic fuel
Used in blast furnaces
None of these
✅ The correct answer is option C.
2910. During the carbonisation of coal
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 of the above
✅ The correct answer is option D.