1
Which of the following is a unit operation?
1
Sublimation
2
Sulphonation
3
Pyrolysis
4
Hydrolysis
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2
Which of the following is not equivalent to standard atmospheric pressure?
1
1 01325 Pa
2
10135 bar
3
760 mm Hg
4
1-01325 x 10s N/m2
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3
One mole of a compound contains
1
one molecule of the substance
2
one atom of the substance
3
6 023 x 1023 molecules
4
22-4 x 103 molecules
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Answer: 6 023 x 1023 molecules
4
Shear stress in a fluid flowing in a round pipe
1
varies parabolically across the cross-section
2
remains constant over the cross-section
3
is zero at the centre and varies linearly with radius
4
is zero at the wall and increases linearly to the centre
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Answer: is zero at the centre and varies linearly with radius
5
With increase in the temperature, viscosity of a liquid
1
increases
2
decreases
3
remains constant
4
None of the above
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6
Hydraulic radius is the ratio of
1
wetted perimeter to flow area
2
flow area to wetted perimeter
3
flow area to square of wetted perimeter
4
square root of flow area to wetted perimeter
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Answer: flow area to wetted perimeter
7
is valid for Re
1
turbulent flow
2
laminar flow through an open channel
3
steady flow
4
None of the above
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Answer: laminar flow through an open channel
8
Limiting reactant for a chemical equation is the reactant that is
1
present in excess of the stoichiometric amount
2
present exactly as per stoichiometric amount
3
present in the smallest stoichiometric amount
4
not having any relation with stoichiometiy
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Answer: present in the smallest stoichiometric amount
9
When chemical reaction occurs in a process, then usually the number of independent material balances and the number of atomic species
1
is different
2
is equal
3
may or may not matter
4
is irrelevant
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10
The amount of air or oxygen required for bringing a process into complete combustion is called
1
theoretical air or oxygen
2
excess air or oxygen
3
practical requirement
4
None of the above
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Answer: theoretical air or oxygen
11
With rise in temperature, the heat capacity of a substance
1
increases
2
decreases
3
remains unchanged
4
either (A) or (B) depends on the substance
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12
A stream bled off to remove an accumulation of inerts or unwanted material in the process is called
1
bypass stream
2
purge stream
3
recycle stream
4
process stream
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13
In general, a gas that exists below its critical temperature is called
1
a critical gas
2
a condensate
3
a vapour
4
a smoke
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14
Gibbs' phase rule is given by
1
F+C=P+ 2
2
F-C=P-2
3
F = C+ P + 2
4
F = C- P + 2
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15
The forces acting on a particle settling in a fluid are
1
gravitational and buoyant forces
2
centrifugal and drag forces
3
gravitational or centrifugal, buoyant and drag forces
4
external, drag and viscous forces
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Answer: gravitational or centrifugal, buoyant and drag forces
