500 Best Irrigation Engineering MCQ
Q113). Slow sand filter is more efficient for the removal of
a).Bacteria
b).Odour
c).Turbidity
d).All of these
Correct Answer:
Bacteria
Explanation:
Q114). In a rapid sand filter
a).Raw water from the source is supplied
b).Disinfected raw water is supplied
c).Raw water passed through coagulation tank is supplied
d).Any one of the above
Correct Answer:
Raw water passed through coagulation tank is supplied
Explanation:
Q115). The yield of a rapid sand filter is ………… to that of slow sand filter
a).10 times
b).15 times
c).20 times
d).30 times
Correct Answer:
30 times
Explanation:
Q116). An arrangement for back washing is provided in
a).Slow sand filter
b).Sedimentation tank
c).Rapid sand filter
d).All of these
Correct Answer:
Rapid sand filter
Explanation:
Q117). In a rapid sand filter, the filter head varies from
a).1 to 1.5 m
b).1.5 to 2 m
c).2 to 4 m
d).4 to 5 m
Correct Answer:
2 to 4 m
Explanation:
Q118). Cleaning of rapid sand filters is done by
a).Scrapping the top layer of filter media
b).Back washing
c).Providing new sand layers
d).All of these
Correct Answer:
Back washing
Explanation:
Q119). Cleaing period for a rapid sand filter is taken as
a).2 to 3 hours
b).2 to 3 days
c).2 to 3 weeks
d).2 to 3 months
Correct Answer:
2 to 3 days
Explanation:
Q120). Rapid sand filter can remove bacterias upto an extent of
a).60 to 70%
b).70 to 80%
c).80 to 90%
d).90 to 99%
Correct Answer:
80 to 90%
Explanation: