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MCQs

Total Questions : 3241 | Page 29 of 325 pages
Question 281. Dimension of mass diffusivity is the same as that of
  1.    Kinematic viscosity
  2.    Dynamic viscosity
  3.    Surface tension
  4.    Pressure
 Discuss Question
Answer: Option A. -> Kinematic viscosity
Question 282. Milk is dried usually in a __________ dryer.
  1.    Freeze
  2.    Spray
  3.    Tray
  4.    Rotary
 Discuss Question
Answer: Option B. -> Spray
Question 283. Molarity is defined as the number of gm moles of solute per __________ of solvent.
  1.    Litre
  2.    Kg
  3.    Gm
  4.    C.c
 Discuss Question
Answer: Option A. -> Litre
Question 284. Deairation (removal of O₂) of water is done by
  1.    Rectification
  2.    Absorption
  3.    Ion-exchange
  4.    Adsorption
 Discuss Question
Answer: Option C. -> Ion-exchange
Question 285. Molality is defined as the number of gm moles of solute per __________ of solvent.
  1.    Litre
  2.    Gm
  3.    Kg
  4.    m³
 Discuss Question
Answer: Option C. -> Kg
Question 286. Hydrogenation of oil is carried out in a/an __________ in Vanaspati manufacturing plant.
  1.    Agitated vessel
  2.    Sieve tray column
  3.    Bubble cap column
  4.    Packed tower
 Discuss Question
Answer: Option A. -> Agitated vessel
Question 287. Radioactive nuclear waste is treated in
  1.    Mixer-settler extractor
  2.    Rotating-disc contactor
  3.    Pulsed column extractor
  4.    Bollman extractor
 Discuss Question
Answer: Option C. -> Pulsed column extractor
Question 288. The adiabatic saturation curve for a vapour-gas mixture is
  1.    Straight line
  2.    Slightly concave upward
  3.    Slightly concave downward
  4.    None of these
 Discuss Question
Answer: Option B. -> Slightly concave upward
Question 289. Unit operation involved in the prilling of urea is
  1.    Evaporation
  2.    Drying
  3.    Crystallisation
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 290. Danckwerts developed the __________ theory.
  1.    Penetration
  2.    Surface renewal
  3.    Film
  4.    None of these
 Discuss Question
Answer: Option B. -> Surface renewal

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