Day 4 Recap
Quiz by Padmasini Srivathsan
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- Q1
FBC effectively removes NH3 from the waste water
truefalseTrue or False20s - Q2
Usually, the moisture in the CaF2sludge that can be achievable using Filter press <40%
truefalseTrue or False20s - Q3
What is the HFW system operating pH suggested to avoid CaCO3 formation?
5-6
7.5-8.5
10.5-12
pH doesn't matter
20s - Q4
what are the chemicals required to remove fluoride (<10 ppm) from HFW system?
Ca (OH)2, CaCO3
NaOH, CaCl2
Ca (OH)2, CaCL2, Alum
None of the above
20s - Q5
What is the pH suggested for crystal formation in the FBC?
4-6
0-2
9.5-10.5
0-14
20s - Q6
Which method is commonly used in water treatment to remove pathogens?
Aeration
Ultra Filtration
UV disinfection
None
20s - Q7
CFRO can be proposed to replace the following in water treatment.
Ultrafiltration
Dissolved Gas floatation
Reverse Osmosis
None
20s - Q8
In the CGE system, Freshwater comes out from
Humidifier
Dehumidifier
Both A& B
Pre-heater
20s - Q9
What is the primary purpose of aeration in water treatment?
Reduce DO level
Increase O2 levels
Floatation purpose
All the above
20s - Q10
Ultrafiltrationcan help remove particles and microorganisms from water
truefalseTrue or False20s - Q11
Fluoride from the feed water can be removed using
Addition of Lime & CaCl2
Ion Exchange
All the above
Fluidized Bed Crystallization
30s - Q12
Air blower capacity does not affect the operation of CGE
falsetrueTrue or False20s