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MCQs

Total Questions : 3241 | Page 323 of 325 pages
Question 3221. Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the________________?
  1.    Latent heat
  2.    Humid heat
  3.    Specific heat
  4.    Sensible heat
 Discuss Question
Answer: Option C. -> Specific heat
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3222. For which of the following unit operations, Lewis number is of significance ?
  1.    Adsorption
  2.    Binary distillation
  3.    Gas absorption
  4.    Humidification
 Discuss Question
Answer: Option D. -> Humidification
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3223. The drying time between fixed moisture contents within the ‘constant rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
  1.    √T
  2.    T
  3.    T1.5
  4.    T3
 Discuss Question
Answer: Option B. -> T
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3224. The minimum number of theoretical plates is required for achieving a given separation in distillation column with_________________?
  1.    No reflux
  2.    Total reflux
  3.    Zero reflux ratio
  4.    Minimum reflux ratio
 Discuss Question
Answer: Option B. -> Total reflux
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3225. With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature) ?
  1.    Increases
  2.    Remains unchanged
  3.    Decreases
  4.    Decreases linearly
 Discuss Question
Answer: Option A. -> Increases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3226. Ion exchange process is similar to___________________?
  1.    Absorption
  2.    Adsorption
  3.    Extraction
  4.    Leaching
 Discuss Question
Answer: Option B. -> Adsorption
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3227. Only small amount of evaporation of water produces large cooling effects because of its___________________?
  1.    Large latent heat
  2.    Low viscosity
  3.    Small latent heat
  4.    None of these
 Discuss Question
Answer: Option A. -> Large latent heat
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3228. As the reflux ratio decreases, the_________________?
  1.    Separation becomes more efficient
  2.    Number of plates increases
  3.    Column diameter increases
  4.    None of these
 Discuss Question
Answer: Option B. -> Number of plates increases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3229. Physical absorption is__________________?
  1.    An irreversible phenomenon
  2.    A reversible phenomenon
  3.    Accompanied by evolution of heat
  4.    Both B. and C.
 Discuss Question
Answer: Option D. -> Both B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3230. Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the _______________ number?
  1.    Schmidt
  2.    Sherwood
  3.    Peclet
  4.    Stanton
 Discuss Question
Answer: Option A. -> Schmidt
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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