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MCQs

Total Questions : 3241 | Page 252 of 325 pages
Question 2511. When the feed to a distillation column is a saturated liquid, slope of the feed line is
  1.    None of these
  2.    Infinity
  3.    Zero
  4.    Unity
 Discuss Question
Answer: Option B. -> Infinity
Question 2512. When the psychometric ratio is __________ then the adiabatic saturation temperature and wet bulb temperature becomes equal.
  1.    1
  2.    > 1
  3.    ?
  4.    < 1
 Discuss Question
Answer: Option A. -> 1
Question 2513. Pick out the system with maximum boiling azeotrope at 1 atm.
  1.    Benzene-ethyl alcohol
  2.    None of these
  3.    Ethyl alcohol-water
  4.    Acetone chloroform
 Discuss Question
Answer: Option D. -> Acetone chloroform
Question 2514. Pick out the system with minimum boiling azeotrope at 1 atm.
  1.    All of these
  2.    Benzene-toluene
  3.    Hydrochloric acid-water
  4.    Ethyl alcohol-water
 Discuss Question
Answer: Option D. -> Ethyl alcohol-water
Question 2515. Can a cooling tower cool water below the wet bulb temperature of inlet air?
  1.    Yes
  2.    Yes ; but the air flow rate should be excessively high
  3.    No
  4.    Yes ; but height of cooling tower will be prohibitively high
 Discuss Question
Answer: Option C. -> No
Question 2516. Raoult's law is applicable to the
  1.    Mixture of water and alcohol
  2.    Ideal solutions
  3.    Non-ideal gases
  4.    Real solutions
 Discuss Question
Answer: Option B. -> Ideal solutions
Question 2517. The operating cost of a distillation column at minimum reflux ratio is
  1.    Zero
  2.    Infinite
  3.    Minimum
  4.    Maximum
 Discuss Question
Answer: Option C. -> Minimum
Question 2518. The fixed cost of a distillation column at minimum reflux ratio is
  1.    Minimum
  2.    Infinite
  3.    Optimum
  4.    None of these
 Discuss Question
Answer: Option B. -> Infinite
Question 2519. Drying operation under vacuum is carried out to
  1.    Increase drying temperature
  2.    Dry those materials which have very high unbound mositure content
  3.    Dry materials having high bound moisture content
  4.    Reduce drying temperature
 Discuss Question
Answer: Option D. -> Reduce drying temperature
Question 2520. Leaching of uranium ore and gold ore is done in
  1.    None of these
  2.    Centrifugal extractor
  3.    Pachuka tanks
  4.    Bollman extractor
 Discuss Question
Answer: Option C. -> Pachuka tanks

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