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MCQs

Total Questions : 88 | Page 9 of 9 pages
Question 81. What is the size of dissolved oil droplets?
  1.    Less than 10 microns
  2.    Less than 8 microns
  3.    Less than 7 microns
  4.    Less than 5 microns
 Discuss Question
Answer: Option D. -> Less than 5 microns
Answer: (d).Less than 5 microns
Question 82. Surfactants and finely divided solids _____the stability of the emulsion.
  1.    Increase
  2.    Decease
  3.    Neutralize
  4.    Nullify
 Discuss Question
Answer: Option A. -> Increase
Answer: (a).Increase
Question 83. An emulsion is a _____ system.
  1.    Homogenous
  2.    Heterogenous
  3.    Natural
  4.    Oxidized
 Discuss Question
Answer: Option B. -> Heterogenous
Answer: (b).Heterogenous
Question 84. Lamella clarifiers are used as pre-treatment ahead of _____
  1.    PST
  2.    SST
  3.    Membrane filters
  4.    Centrifugal tanks
 Discuss Question
Answer: Option C. -> Membrane filters
Answer: (c).Membrane filters
Question 85. __________ maintain the required water quality to the membrane without the use of chemicals.
  1.    Settlers
  2.    Primary settlers
  3.    Centrifugal tanks
  4.    Lamella settlers
 Discuss Question
Answer: Option D. -> Lamella settlers
Answer: (d).Lamella settlers
Question 86. How much spacing should be provided in between the tubes?
  1.    10 mm
  2.    20 mm
  3.    30 mm
  4.    50 mm
 Discuss Question
Answer: Option D. -> 50 mm
Answer: (d).50 mm
Question 87. What is the length of the tube in lamella clarifiers?
  1.    0.5-1 m
  2.    1-2 m
  3.    2-3 m
  4.    3-5 m
 Discuss Question
Answer: Option B. -> 1-2 m
Answer: (b).1-2 m
Question 88. What is the maximum load of solids that lamella clarifiers can handle?
  1.    1000 mg/L
  2.    2000 mg/L
  3.    3000 mg/L
  4.    4000 mg/L
 Discuss Question
Answer: Option C. -> 3000 mg/L
Answer: (c).3000 mg/L

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