Centrifuge Devices for Solid Liquid Separations MCQ

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• Calculate the sigma factor for the following operating conditions Bowl length L=0.1m Rotation rate n=4000/s R0=0.02m, R1=0.01m
  ক

  323

  খ

  212

  গ

  234

  ঘ

  222
• Calculate the sigma factor for the following operating conditions Bowl length L=0.05m Rotation rate n=2000/s R0=0.02m, R1=0.01m
  ক

  27

  খ

  55

  গ

  111

  ঘ

  165
• Calculate the sigma factor for the following operating conditions Bowl length L=0.3m Rotation rate n=2000/s R0=0.02m, R1=0.01m
  ক

  50

  খ

  55

  গ

  111

  ঘ

  165
• Calculate the sigma factor for the following operating conditions Bowl length L=0.2m Rotation rate n=2000/s R0=0.02m, R1=0.01m
  ক

  50

  খ

  55

  গ

  111

  ঘ

  165
• Calculate the sigma factor for the following operating conditions Bowl length L=0.1m Rotation rate n=2000/s R0=0.02m, R1=0.01m
  ক

  50

  খ

  55

  গ

  111

  ঘ

  165
• Why are gravity separators not used in bioseparations?
  ক

  Because density differences are very large

  খ

  Because density differences are very small

  গ

  Because gravity separators are too small

  ঘ

  Because the cultures get damaged
• When is the basket-filtering centrifuge not used?
  ক

  Solids are main product

  খ

  Low cake moisture content

  গ

  High solid recovery desired

  ঘ

  High liquid recovery desired
• In which industry tubular-bowl centrifuge not used?
  ক

  Food industry

  খ

  Pharma industry

  গ

  Biochemical industry

  ঘ

  Metallurgical industry
• What is the use of tubular-bowl centrifuge?
  ক

  To separate soap from oil

  খ

  To separate waste material

  গ

  To separate cells and viruses from broth

  ঘ

  To separate salts from mixtures
• What are the two general types of centrifuge devices for solid-liquid separations?
  ক

  Sedimentation centrifuges, filtering centrifuges

  খ

  Sedimentation centrifuges, decantation centrifuges

  গ

  Filtering centrifuges, sintering centrifuges

  ঘ

  Sedimentation centrifuges, two way centrifuges