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Waste Water Engineering
Tricky Waste Water Engineering
Quiz 1
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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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