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MCQs

Total Questions : 2215 | Page 6 of 222 pages
Question 51. Size reduction of asbestos and mica is done by
  1.    Hammer mills
  2.    Rod mills
  3.    Gyratory crushers
  4.    Crushing rolls
 Discuss Question
Answer: Option A. -> Hammer mills
Question 52. Trommels separate a mixture of particles depending on their
  1.    Size
  2.    Density
  3.    Wettability
  4.    Electrical & magnetic properties
 Discuss Question
Answer: Option A. -> Size
Question 53. Use of grinding aids results in the
  1.    Enhanced production rate
  2.    Finer products
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option D. -> Neither A nor B
Question 54. Separation of materials of the same density based on their sizes by using then-different rates of flow is called
  1.    Sorting
  2.    Sizing
  3.    Flocculation
  4.    Elutriation
 Discuss Question
Answer: Option B. -> Sizing
Question 55. Fick's law relates to
  1.    Energy consumption
  2.    Final particle size
  3.    Feed size
  4.    None of these
 Discuss Question
Answer: Option A. -> Energy consumption
Question 56. Filter aid is used to
  1.    Increase the rate of filtration
  2.    Decrease the pressure drop
  3.    Increase the porosity of the cake
  4.    Act as a support base for the septum
 Discuss Question
Answer: Option C. -> Increase the porosity of the cake
Question 57. Which of the following is a coarse crusher?
  1.    Smooth roll crusher
  2.    Toothed roll crusher
  3.    Gyratory crusher
  4.    Tube mill
 Discuss Question
Answer: Option C. -> Gyratory crusher
Question 58. Moore filter is a __________ filter.
  1.    Leaf
  2.    Press
  3.    Rotary
  4.    Sand
 Discuss Question
Answer: Option A. -> Leaf
Question 59. Bucket elevators are not suitable for the vertical lifting of __________ materials.
  1.    Fine (e.g. - 200 mesh size coal)
  2.    Sticky (e.g. clay paste)
  3.    Small lumpy (e.g. grains and sand)
  4.    Free flowing
 Discuss Question
Answer: Option B. -> Sticky (e.g. clay paste)
Question 60. Which of the following is a vacuum filter?
  1.    Filter press
  2.    Rotary disc filter
  3.    Batch basket centrifuge
  4.    Tank filter (Nutsch filter)
 Discuss Question
Answer: Option B. -> Rotary disc filter

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