1. The process of passing water through beds of granular materials, is called ______.
[A] Sedimentation
[B] Filtration
[C] Screening
[D] None
Answer: Option B
2. Methemoglobinemia or blue baby disease is caused due to _____.
[A] Nitrites
[B] Nitrates
[C] Chlorides
[D] Sulphides
Answer: Option B
3. To control the growth of algae in reservoirs, the compound which is used, is _____.
[A] Copper sulphate
[B] Bleaching powder
[C] Lime solution
[D] Alum solution
Answer: Option A
4. A pressure conduit laid underground, may not be subjected to ______.
[A] Longitudinal temperature stress
[B] Internal pressure of water
[C] Longitudinal stresses due to unbalanced pressure to bends
[D] Pressure due to external load
Answer: Option A
5. For the prediction of future population of a city, the factor to be considered, is ______.
[A] Deaths
[B] Births
[C] Migrants
[D] All the above
Answer: Option D