Chemical Engineering MCQs

6108 MCQs  (Page 179 of 611)

Attempt Chemical Engineering Quiz
At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is ________________ percent.?
A. 100
B. 0
C. 50
D. Between 0 and 100
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Molecular diffusivity of a liquid__________________?
A. Increases with temperature
B. Decreases with temperature
C. May increase or decrease with temperature
D. Is independent of temperature
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Use of natural draft cooling tower is practised, when the air has low ?
A. Humidity
B. Temperature
C. Both a. & b.
D. Neither a. nor b.
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Raschig ring made of porcelain cannot be used for treating concentrated___________________?
A. Hydrochloric acid
B. Nitric acid
C. Alkalis
D. Sulphuric acid
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Tower diameter may be decreased by__________________?
A. Using higher reflux ratio
B. Use of increased tray spacing
C. Increasing the liquid flow rate
D. Increasing the vapour flow rate
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The humid volume may be increased by increasing the____________________?
A. Temperature at constant humidity
B. Humidity at constant temperature
C. Both a. and b.
D. Neither a. nor b.
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Pick out the correct relationship. (Where, Ri = internal reflux ratio Ro = external reflux ratio.) ?
A. (1 + ro) = ro/ri
B. (1 – ro) = ro/ri
C. (1 + ri) = ro/ri
D. (1 – ri) = ro/ri
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Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the_________________?
A. High evaporation losses of water
B. High pressure drop of the gas
C. Difficulty in its fabrication
D. None of these
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According to Poiseuille’s law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)___________________?
A. Μ
B. 1/μ
C. √μ
D. Μ2
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In case of constant underflow extraction operation, the _______________________ at all solute concentration?
A. Solids are drained to the same extent
B. Ratio of the insoluble to solution is constant
C. Both a. & b.
D. Neither a. nor b.
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Word of the Day
26 Jul
Simultaneously
at the same time.
ایک ہی وقت میں، ایک ساتھ، بیک وقت

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