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MCQs

Total Questions : 476 | Page 9 of 48 pages
Question 81. What is the maximum acceptable limit of temperature for RO?
  1.    20˚C
  2.    30˚C
  3.    40˚C
  4.    50˚C
 Discuss Question
Answer: Option C. -> 40˚C
Answer: (c).40˚C
Question 82. Calculate the recovery for the following data:
Product Flow: 535 m³/h
Feed flow : 635 m³/h
Flux considered: 12 lmh
  1.    80%
  2.    85%
  3.    90%
  4.    75%
 Discuss Question
Answer: Option B. -> 85%
Answer: (b).85%
Question 83. What is the operating pH for RO systems?
  1.    2-3
  2.    4-6
  3.    5-7
  4.    8-9
 Discuss Question
Answer: Option C. -> 5-7
Answer: (c).5-7
Question 84. Calculate the number of membranes required for the following data:
Flow: 535 m³/h
Area: 400 m²
Flux considered: 12 lmh
  1.    112
  2.    115
  3.    117
  4.    120
 Discuss Question
Answer: Option A. -> 112
Answer: (a).112
Question 85. What is the design temperature of RO systems?
  1.    20˚C
  2.    25˚C
  3.    30˚C
  4.    35˚C
 Discuss Question
Answer: Option B. -> 25˚C
Answer: (b).25˚C
Question 86. Which type of membrane exhibit high flux?
  1.    Isotropic
  2.    Anisotropic
  3.    Symmetric
  4.    Tubular
 Discuss Question
Answer: Option B. -> Anisotropic
Answer: (b).Anisotropic
Question 87. What is the diameter assumed for hollow fine membranes for treating brackish water?
  1.    90 microns
  2.    95 microns
  3.    85 microns
  4.    80 microns
 Discuss Question
Answer: Option C. -> 85 microns
Answer: (c).85 microns
Question 88. Which type of membrane exhibit low flux?
  1.    Isotropic
  2.    Anisotropic
  3.    Asymmetric
  4.    Tubular
 Discuss Question
Answer: Option A. -> Isotropic
Answer: (a).Isotropic
Question 89. What type of structure does the hollow fibre have?
  1.    Symmetric
  2.    Asymmetric
  3.    Isotropic
  4.    Anisotropic
 Discuss Question
Answer: Option B. -> Asymmetric
Answer: (b).Asymmetric
Question 90. Which of these can be operated by turbulent flow?
  1.    Tubular
  2.    Spiral wound
  3.    Plate and frame
  4.    Hollow fibre
 Discuss Question
Answer: Option A. -> Tubular
Answer: (a).Tubular

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