WATER TREATMENT
Authored by SILAMBARASAN SIMBU
Health Sciences
University
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60 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The rejection rate of a good RO membrane is usually:
40–50%
60–70%
95–99%
20–30%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which pre-treatment is generally required before RO plant?
Softener
Multimedia filter
Activated carbon filter
All of the above
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
RO membrane is made of:
Polypropylene
Cellulose acetate or polyamide
PVC
Stainless steel
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which pre-treatment protects RO membrane from chlorine
Softener
Activated carbon filter
Multimedia filter
UV filter
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Typical RO pressure for brackish water plants is:
5–10 psi
20–50 psi
500–800 psi
150–250 psi
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Scaling in RO occurs due to:
High chlorine
High CO₂
High hardness (Ca, Mg salts)
Low pH
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pH of RO permeate water is usually:
7.0–8.0
6.0–6.8
8.5–9.0
5.0–5.5
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