Mass Transfer

581.Which of the following is not a batch drier?

  1. Truck drier
  2. Agitated pan drier
  3. Fluidised bed drier
  4. Vacuum shelf drier

Correct answer: (C)
Fluidised bed drier

582.Which of the following is not a continuous drier?

  1. Drum drier
  2. Spray drier
  3. Tunnel drier
  4. Tray drier

Correct answer: (D)
Tray drier

583.Which of the following is not a unit of mass transfer co-efficient?

  1. Moles transferred/ [(time) (area) (mole fraction)]
  2. Moles transferred/ [(time) (area) (mass A/mass B)]
  3. Moles transferred/ [(time) (area) (pressure)]
  4. None of these

Correct answer: (D)
None of these

584.Which of the following is not fixed by the process requirements, in the design of absorbers?

  1. Flow rate of the entering gas
  2. Composition of the entering liquid
  3. Terminal concentrations of gas stream
  4. None of these

Correct answer: (D)
None of these

585.Which of the following is the most suitable for extraction in a system having very low density difference?

  1. Mixer-settler extractor
  2. Centrifugal extractor
  3. Pulsed extractor
  4. Packed extraction tower

Correct answer: (B)
Centrifugal extractor

586.Which of the following is used for the concentration of rubber latex?

  1. Agitated film evaporator
  2. Long tube vertical evaporator
  3. Short tube evaporator
  4. Calandria

Correct answer: (A)
Agitated film evaporator

587.Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?

  1. Sieve plate column
  2. Bubble cap column
  3. Randomly packed column
  4. Wetted wall column

Correct answer: (D)
Wetted wall column

588.Which of the following mixtures does not form an azeotrope at atmospheric pressure?

  1. Water-alcohol
  2. Methyl alcohol-acetone
  3. Butyl acetate-water
  4. None of these

Correct answer: (D)
None of these

589.Which of the following operations does not involve leaching?

  1. Dissolving gold from ores
  2. Dissolving pharmaceutical products from bark or roots
  3. Dissolving sugar from the cells of the beet
  4. Removing nicotine from its water solution by kerosene

Correct answer: (D)
Removing nicotine from its water solution by kerosene

590.Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?

  1. Dry bulb temperature
  2. Dew point
  3. Wet bulb temperature
  4. None of these

Correct answer: (C)
Wet bulb temperature

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