Q.1
What is the diameter assumed for hollow fine membranes for treating sea water?
  • a) 90 microns
  • b) 95 microns
  • c) 100 microns
  • d) 105 microns
Q.2
What is the permeate flux of UTC series?
  • a) 0.5
  • b) 0.8
  • c) 1
  • d) 3.3
Q.3
What is the percentage salt rejection of PES-1000?
  • a) 98 %
  • b) 99 %
  • c) 99.8 %
  • d) 99.9 %
Q.4
Which of these is true about reverse osmosis membranes?
  • a) They get hydrolysed at extreme low/ high pH conditions
  • b) They get hydrolysed at extreme high pH conditions
  • c) They get hydrolysed at extremely low pH conditions
  • d) They don’t get hydrolysed at extreme low/ high pH conditions
Q.5
Which of these materials can be made into thin film composite?
  • a) Polyamide
  • b) Cellulose acetate
  • c) Cellulose triacetate
  • d) Polyethylene sulphate
Q.6
Which of these pollutants cannot be tolerated by the hollow fibre sheets?
  • a) Free chlorine
  • b) BOD
  • c) COD
  • d) Free magnesium
Q.7
What is the concentration of chlorine upto which these spiral wound membranes can withstand?
  • a) 2.0 ppm
  • b) 1.0 ppm
  • c) 1.5 ppm
  • d) 2.5 ppm
Q.8
What is the diameter assumed for hollow fine membranes for treating brackish water?
  • a) 90 microns
  • b) 95 microns
  • c) 85 microns
  • d) 80 microns
Q.9
Which type of membrane exhibit low flux?
  • a) Isotropic
  • b) Anisotropic
  • c) Asymmetric
  • d) Tubular
Q.10
Which type of membrane exhibit high flux?
  • a) Isotropic
  • b) Anisotropic
  • c) Symmetric
  • d) Tubular
Q.11
Which of these can be operated by turbulent flow?
  • a) Tubular
  • b) Spiral wound
  • c) Plate and frame
  • d) Hollow fibre
Q.12
What type of structure does the hollow fibre have?
  • a) Symmetric
  • b) Asymmetric
  • c) Isotropic
  • d) Anisotropic
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