A Best Way To Crack Gorenment Job Exams

Civil Engineering Objective Questions { Hydrology }

148.  Flow through period, in sedimentation tanks, is
A. equal to detention period
B. more than detention period
C. less than detention period
D. detention period divided by displacement efficiency
Discuss in Forum

149.  Alum is chemically
A. Copper sulphate
B. Aluminium sulphate
C. Ferrous sulphate
D. Ferric sulphate.
Discuss in Forum

150.  The process of passing water through beds of granular materials, is called
A. screening
B. sedimentation
C. filtration
D. none of these.
Discuss in Forum

151.  Filtration of water is done to remove
A. colour
B. odour
C. turbidity
D. pathogenic bacteria
Discuss in Forum

152.  The main process to purify water by filtration, is
A. mechanical straining
B. flocculation and sedimentation
C. biological metabolism
D. all the above.
Discuss in Forum

153.  An ideal sand for filters should be
A. free from dirt and other impurities
B. uniform in nature and size
C. hard and resistant
D. all the above.
Discuss in Forum

154.  The U.C.60 .C. (uniformity coefficient) Dio for the best filter media sand should be
Discuss in Forum

Page 22 of 53

« 20 21  22  2324 »