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MCQs

Total Questions : 3241 | Page 318 of 325 pages
Question 3171. The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?
  1.    L/mG
  2.    G/mL
  3.    mL/G
  4.    LG/m
 Discuss Question
Answer: Option A. -> L/mG
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3172. As the reflux ratio in a distillation column is increased from the minimum, the______________________?
  1.    Slope of the operating line in stripping section decreases
  2.    Number of plates decreases very slowly first and then more and more rapidly
  3.    Total cost first decreases and then increases
  4.    Liquid flow increases while the vapor flow decreases for a system
 Discuss Question
Answer: Option C. -> Total cost first decreases and then increases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3173. When the feed to a distillation column is a saturated liquid, slope of the feed line is_____________________?
  1.    Zero
  2.    Unity
  3.    Infinity
  4.    None of these
 Discuss Question
Answer: Option C. -> Infinity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3174. Solvent used in extractive distillation_________________________?
  1.    Is of low volatility
  2.    Forms a low boiling azeotrope
  3.    Forms a high boiling azeotrope
  4.    Does not alter the relative volatility of the original components
 Discuss Question
Answer: Option B. -> Forms a low boiling azeotrope
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3175. Chemisorption (chemical adsorption) is_______________________?
  1.    Same as “Van der Waals” adsorption
  2.    Characterised by adsorption of heat
  3.    An irreversible phenomenon
  4.    A reversible phenomenon
 Discuss Question
Answer: Option C. -> An irreversible phenomenon
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3176. Inside the distillation column, the________________________?
  1.    Driving force for the vapour flow is the pressure drop
  2.    Liquids are not always at their bubble points
  3.    Pressure increases gradually from bottom to the top of the column
  4.    None of these
 Discuss Question
Answer: Option A. -> Driving force for the vapour flow is the pressure drop
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3177. Dry bulb temperature of unsaturated air is more than its ________________ temperature?
  1.    Dew point
  2.    Wet bulb
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3178. A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around _______________ °C?
  1.    21.7
  2.    20
  3.    27.3
  4.    18.7
 Discuss Question
Answer: Option D. -> 18.7
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3179. Inside the distillation columns, the ________________________?
  1.    Highest temperatures is near the feed plate
  2.    Driving force for the liquid flow is its weight
  3.    Vapors are not always at their dew points
  4.    All A., B. and C.
 Discuss Question
Answer: Option B. -> Driving force for the liquid flow is its weight
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3180. An Azeotropic mixture is a ________________ mixture?
  1.    Binary
  2.    Ternary
  3.    Constant boiling point
  4.    None of these
 Discuss Question
Answer: Option C. -> Constant boiling point
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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