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MCQs

Total Questions : 3241 | Page 258 of 325 pages
Question 2571. The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 – PA2) is for_______________________?
  1.    Fick’s second law of diffusion
  2.    Steady state diffusion for stagnant case
  3.    Liquid M.T.C. by Higbie penetration theory
  4.    None of these
 Discuss Question
Answer: Option B. -> Steady state diffusion for stagnant case
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2572. Perforated plate towers are unique for solvent extraction because, they provide_____________________?
  1.    Higher contact area
  2.    Better contact of the phase
  3.    Repeated coalescence & redispersion of the drop phase
  4.    None of these
 Discuss Question
Answer: Option C. -> Repeated coalescence & redispersion of the drop phase
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2573. The cooling effect in a cooling tower can be speeded up by _______________________?
  1.    Increasing the air velocity and area of exposed wet surface
  2.    Reducing the barometric pressure
  3.    Reducing the humidity of the air
  4.    All A., B. and C.
 Discuss Question
Answer: Option D. -> All A., B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2574. To remove all the moisture from a wet solid it requires exposure to _____________ air?
  1.    Perfectly dry
  2.    Highly humid
  3.    High temperature
  4.    None of these
 Discuss Question
Answer: Option A. -> Perfectly dry
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2575. The Knudsen diffusivity is proportional to (where, T = absolute temperature) ______________________?
  1.    √T
  2.    T2
  3.    T
  4.    T4
 Discuss Question
Answer: Option A. -> √T
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2576. Which of the following processes is not an example of adsorption applied to gaseous separations ?
  1.    Recovery of valuable solvent vapors from dilute mixture with air and other gases
  2.    Dehumidification of air and gas
  3.    Removal of objectionable odour and impurities from industrial gases
  4.    Decolouration of yellow glycerine
 Discuss Question
Answer: Option D. -> Decolouration of yellow glycerine
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2577. With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop___________________?
  1.    Decreases
  2.    Remains unchanged
  3.    Increases
  4.    Decreases exponentially
 Discuss Question
Answer: Option C. -> Increases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2578. A natural draft cooling tower is filled with wooden grids, which covers about _________________ percent of the tower height?
  1.    10-15
  2.    30-40
  3.    70-80
  4.    90-10
 Discuss Question
Answer: Option A. -> 10-15
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2579. Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the _______________ moisture?
  1.    Free
  2.    Unbound
  3.    Equilibrium
  4.    Bound
 Discuss Question
Answer: Option C. -> Equilibrium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2580. The relative volatility of a binary mixture at the Azeotropic composition is _______________________?
  1.    1
  2.    > 1
  3.    0
  4.    ∞
 Discuss Question
Answer: Option A. -> 1
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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