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Question
Starting material for the production of butadiene in India is
Options
A. naphthalene
B. benzol
C. ethyl alcohol
D. phthalic anhydride
Correct Answer
ethyl alcohol
More questions
1. Alkylation
Options
A. causes olefins to combine with each other.
B. causes olefins to combine with iso-paraffins.
C. converts iso-paraffin into olefin.
D. converts olefin into paraffin.
Show Answer
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Discuss
Correct Answer: causes olefins to combine with iso-paraffins.
2. An adequate clearance between the tray and the shell wall of a distillation column is provided to
Options
A. drain the liquid from the tray when the unit is not in operation.
B. allow for thermal expansion and facilitate installation.
C. avoid back-trapping.
D. none of these.
Show Answer
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Discuss
Correct Answer: allow for thermal expansion and facilitate installation.
3. Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a
Options
A. higher dew point.
B. higher absolute (specific) humidity.
C. higher relative humidity
D. higher wet bulb temperature.
Show Answer
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Discuss
Correct Answer: higher relative humidity
4. __________ baffles are provided in ball mills.
Options
A. Horizontal
B. No
C. Only two
D. None of these
Show Answer
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Discuss
Correct Answer: Horizontal
5. The minimum shell thickness for tank ? 15 metres diameter is limited to __________ mm, for reasons of elastic stability.
Options
A. 2
B. 5
C. 10
D. 15
Show Answer
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Discuss
Correct Answer: 5
6. Cartridge filters are termed as 'edge' filters, because of the fact that the
Options
A. disks have very sharp edge.
B. solids are not deposited at the edge of the disk.
C. bulk of the solids are removed at the periphery of the disks.
D. none of these.
Show Answer
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Discuss
Correct Answer: bulk of the solids are removed at the periphery of the disks.
7. The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is
Options
A.
pd
/2
t
B.
pd
/4
t
C.
pd
/
t
D.
pd
/8
t
Show Answer
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Discuss
Correct Answer:
pd
/4
t
8. Which is a secondary crusher for a hard & tough stone?
Options
A. Jaw crusher
B. Cone crusher
C. Impact crusher
D. Toothed roll crusher
Show Answer
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Discuss
Correct Answer: Cone crusher
9. H/C ratio (by weight) for the same number of carbon atoms is the highest in case of
Options
A. aromatics
B. paraffins
C. olefins
D. naphthenes
Show Answer
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Discuss
Correct Answer: naphthenes
10. Liquid discharge from a tank or reservoir can not be measured by
Options
A. orificemeters
B. weirs
C. mouthpieces
D. notches
Show Answer
Scratch Pad
Discuss
Correct Answer: orificemeters
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