Top 150+ Solved Water Supply Engineering MCQ Questions Answer

From 136 to 150 of 194

Q. What is the preferred regenerant in case of cation exchanger?

a. hcl

b. h2so4

c. h2co3

d. hf

  • a. hcl

Q. What is the preferred regenerant in case of anion exchanger?

a. nacl

b. naoh

c. na2so4

d. na2co3

  • b. naoh

Q. For obtaining Silica<5 ppm which of these should be utilized?

a. sba followed by mixed be

b. sba

c. wba sba followed by mixed bed

d. mixed bed

  • a. sba followed by mixed be

Q. In which year was the Ferrosand process patented?

a. 1960

b. 1965

c. 1970

d. 1975

  • b. 1965

Q. What is the permitted concentration of manganese in drinking water?

a. 30 g/l

b. 40 g/l

c. 50 g/l

d. 60 g/l

  • c. 50 g/l

Q. What is the permitted concentration of arsenic in drinking water?

a. 10 g/l

b. 20 g/l

c. 30 g/l

d. 40 g/l

  • a. 10 g/l

Q. What is the minimum time of aeration?

a. 20 minutes

b. 40 minutes

c. 60 minutes

d. 80 minutes

  • c. 60 minutes

Q. At what pH should the water be maintained?

a. 6.5

b. 7.5

c. 8.5

d. 9

  • b. 7.5

Q. What is the minimum required redox potential of water?

a. 100 mv

b. 200 mv

c. 300 mv

d. 400 mv

  • b. 200 mv

Q. What is the desirable bed depth for AFM filtration?

a. 1000 mm

b. 1200 mm

c. 1500 mm

d. 1800 mm

  • b. 1200 mm

Q. What is the maximum allowable flow for backwash?

a. 20 m/hr

b. 45 m/hr

c. 60 m/hr

d. 80 m/hr

  • c. 60 m/hr
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