Naphtha
Petrol
Kerosene
Heavy fuel oil
✅ The correct answer is option D.
Engineering
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2662. Butadiene is a/an
di-olefin
naphthene
aromatic
olefin
✅ The correct answer is option A.
2663. A coal having higher volatile matter content, has lower
Smoking tendency on burning
Coke oven gas yield on carbonisation
Chance of catching fire during storage in open space
Ignition temperature
✅ The correct answer is option D.
2664. Which of the following gaseous fuels has the highest net calorific value (kcal/Nm³)?
Producer gas
Carburetted water gas
Natural gas
Liquified petroleum gas
✅ The correct answer is option D.
2665. Stack (chimney) height in a big thermal power plant is dictated by the
Pollution control aspect
Draught to be created
Limitation of constructional facilities
None of these
✅ The correct answer is option B.
2666. Gum formation in stored gasoline is mainly due to the
alkylation of unsaturates.
presence of sulphur.
oxidation & polymerisation of unsaturates.
higher aromatic content.
✅ The correct answer is option C.
2667. A particular coal is said to be free burning when it
Burns completely
Gives smokeless burning
Shows little or no fusing action
None of these
✅ The correct answer is option C.
2668. Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________ ptb (pounds per thousand barrel).
0.03
3
35
70
✅ The correct answer is option B.
2669. The difference between total carbon and fixed carbon of coal will be minimum in case of
Lignite
Bituminous coal
Anthracite
High temperature coke (V.M < 0.5%)
✅ The correct answer is option D.
2670. True vapour pressure of a petroleum fraction __________ Reid vapour pressure.
is less than
is more than
is same as
may be either more or less than
✅ The correct answer is option B.