Chemical Engineering Mcqs

Pick out the wrong statement ?
  • (A)  In solvent extraction, the distribution co-efficient should be as large as possible for solvent economy
  • (B)  With increase in pressure, the solubility of gases in solvent increases at a fixed temperature
  • (C)  Decrease in Murphree plate efficiency is an indication of entrainment in distillation column
  • (D)  The capacity of a distillation column is maximum at total reflux
Submitted By :Ali Uppal
Pick out the wrong statement pertaining to the cooling towers ?
  • (A)  In case of induced draft cooling tower, the fan is placed at the top of the tower
  • (B)  Effectiveness of forced draft cooling tower is reduced by the recirculation of the humid and hot discharged air
  • (C)  A natural draft cooling tower is recommended to be used, when the air humidity is low and air temperature is also low
  • (D)  Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature
Submitted By :Ali Uppal
A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))_____________?
  • (A)  M(Xo – XF)
  • (B)  M(Xo/XF)
  • (C)  M ln(Xo/XF)
  • (D)  MXo ln(Xo/XF)
Submitted By :Ali Uppal

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