Chemical Engineering MCQs

6108 MCQs  (Page 159 of 611)

Attempt Chemical Engineering Quiz
The relative volatility of a binary mixture at the Azeotropic composition is _______________________?
A. 1
B. > 1
C. 0
D. ∞
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Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and ‘t’ is time) ?
A. (de.t)1/2
B. (de/t)1/2
C. (4de/πt)1/2
D. (4de/t)
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The equation, NA = (DAB . Pt /RTZ) (y1 – y2) is for _______________________?
A. Steady state equimolar counter diffusion
B. Fick’s first law of diffusion
C. Steady state diffusion for stagnant case
D. Liquid m.t.c. by penetration theory
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Coffee is prepared from coffee beans by leaching with____________________?
A. Cold water
B. Hot water
C. Dilute hot caustic solution
D. Naphtha
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Which of the following parameters remains constant during chemical dehumidification ?
A. Dry bulb temperature
B. Partial pressure of vapour
C. Wet bulb temperature
D. None of these
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A slurry is to be dried to produce flaky solid. Which dryer would you recommend ?
A. Spray dryer
B. Drum dryer
C. Rotary dryer
D. Dielectric dryer
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In steam distillation, the _____________________?
A. Temperature is 100°c
B. Temperature is more than 100° c
C. Product must be immiscible with water
D. Temperature is higher than the boiling point of either component
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Dried finished product sampled from various parts of a ________________ dryer exhibits nonuniformity in the moisture content?
A. Rotary
B. Tray
C. Freeze
D. None of these
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In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raffinate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg) ?
A. 6.89
B. 8.89
C. 10
D. 8.25
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The value of „L/mG’ ratio for economical absorption operation ranges from _____________________?
A. 0.5 to 0.8
B. 0.8 to 1.2
C. 1.25 to 2.0
D. 2.5 to 3.5
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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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