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MCQs

Total Questions : 103 | Page 5 of 11 pages
Question 41. What is the other name for deflocculation?
  1.    Flocculation
  2.    Peptisation
  3.    Coagulation
  4.    Dewatering
 Discuss Question
Answer: Option B. -> Peptisation
Answer: (b).Peptisation
Question 42. The clustered particles formed in the presence of a flocculant are called ______
  1.    Colloid
  2.    Flocs
  3.    Ion
  4.    Polymer
 Discuss Question
Answer: Option B. -> Flocs
Answer: (b).Flocs
Question 43. What is the movement of solids in water called?
  1.    Motion
  2.    Brownian motion
  3.    Horizontal motion
  4.    Viscous motion
 Discuss Question
Answer: Option B. -> Brownian motion
Answer: (b).Brownian motion
Question 44. What is the chemical formula of aluminium sulphate?
  1.    Al₂(SO₄)₃
  2.    Al(SO₄)₃
  3.    Al₂(SO₄)
  4.    Al(SO₄)
 Discuss Question
Answer: Option A. -> Al₂(SO₄)₃
Answer: (a).Al₂(SO₄)₃
Question 45. 1 micrometer = _______
  1.    10⁻² m
  2.    10⁻³ m
  3.    10⁻⁶ m
  4.    10⁻⁹ m
 Discuss Question
Answer: Option C. -> 10⁻⁶ m
Answer: (c).10⁻⁶ m
Question 46. What is the test used to select the type of coagulant required?
  1.    Bar test
  2.    Jar test
  3.    Stock test
  4.    Coagulant test
 Discuss Question
Answer: Option B. -> Jar test
Answer: (b).Jar test
Question 47. What is the ratio of Alum/Phosphate while adding alum to a waste water in order to remove the phosphates present?
  1.    1.4:2.5
  2.    1:2
  3.    3:5
  4.    5:7
 Discuss Question
Answer: Option A. -> 1.4:2.5
Answer: (a).1.4:2.5
Question 48. At what pH is the solubility of AlPO₄ minimum?
  1.    8
  2.    6.3
  3.    9.5
  4.    10
 Discuss Question
Answer: Option B. -> 6.3
Answer: (b).6.3
Question 49. Grit and sand particles are removed from waste water by which type of settling?
  1.    Flocculent settling
  2.    Discrete particle settling
  3.    Hindered settling
  4.    Compression settling
 Discuss Question
Answer: Option B. -> Discrete particle settling
Answer: (b).Discrete particle settling
Question 50. In the discrete settling type which of these factors is a constant?
  1.    velocity
  2.    acceleration
  3.    time taken to settle
  4.    weight of the particles
 Discuss Question
Answer: Option B. -> acceleration
Answer: (b).acceleration

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