Mass Transfer MCQs with answers Page - 70

Here, you will find a collection of MCQ questions on Mass Transfer. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

Admin • 802.91K Points
Coach

Q. For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

  • (A) 1-5
  • (B) 10-60
  • (C) 200-300
  • (D) > 500

A

Admin • 802.91K Points
Coach

Q. Berl saddle made of carbon cannot be used for

  • (A) Alkalis
  • (B) SO2
  • (C) H2SO4
  • (D) Oxidising atmosphere

A

Admin • 802.91K Points
Coach

Q. Capacity of a rotary dryer depends on its

  • (A) rpm
  • (B) Inclination with ground surface
  • (C) Both (A) and (B)
  • (D) Neither (A) nor (B)

A

Admin • 802.91K Points
Coach

Q. The most common packing used in industrial operations is __________ rings.

  • (A) Raschig
  • (B) Lessing
  • (C) Cross-partition
  • (D) Single spiral

A

Admin • 802.91K Points
Coach

Q. Refractory bricks are usually dried in a __________ dryer.

  • (A) Tray
  • (B) Tunnel
  • (C) Conveyor
  • (D) Festoon

A

Admin • 802.91K Points
Coach

Q. The binary diffusivity in gases at atmospheric conditions is about

  • (A) 10-9 cm/sec
  • (B) 10-1 cm2/sec
  • (C) 10-3 sec/cm
  • (D) 10-4 cm2/sec2

A

Admin • 802.91K Points
Coach

Q. For absorbers, high pressure drop results in

  • (A) Increased efficiency
  • (B) Decreased efficiency
  • (C) High operating cost
  • (D) Better gas liquid contact

A

Admin • 802.91K Points
Coach

Q. __________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid.

  • (A) Dew point
  • (B) Bubble point
  • (C) Dry bulb temperature
  • (D) Wet bulb temperature

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