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GATE Exam Questions - Engineering

Q1:

The following characteristics pertain to the sand filters used in water industry.
  1. Filtration rate is 1 to 4 m3 (m2 day).
  2. Typical duration of operation in one run is 24 to 72 hours.
  3. Operating cost is low.
Which of the above characteristics pertain to slow sand filters ?

A I, II and III

B I and II

C II and III

D I and III

ANS:D - I and III

How the operating cost will help for slow function of filters.