Water Supply and Sanitary

141) The maximum discharge of a tube-well is

Discuss in Comment

50 litres/sec

142) The length of rectangular sedimentation tank should not be more than, where B is the width of the tank

Discuss in Comment

4B

143) Air binding phenomena in rapid sand filters occur due to

Discuss in Comment

excessive negative head

144) In lime-soda process

Discuss in Comment

lime reduces the carbonate hardness and soda-ash removes the non-carbonate hardness

145) The major disadvantage of lime soda process of water softening is that

Discuss in Comment

huge amount of precipitate is formed which creates a disposal problem

146) Sewerage system is usually designed for

Discuss in Comment

25 years

147) The minimum and maximum diameters of sewers shall preferably be

Discuss in Comment

15 cm and 300 cm

148) The hydraulic mean depth (HMD) for an egg-shaped sewer flowing two-third full is

Discuss in Comment

greater than H MD when flowing full

149) Sewage treatment units are normally designed for

Discuss in Comment

15—20 years

150) The ratio of 5 day BOD to ultimate BOD is about

Discuss in Comment

2/3

Subject Notes

→ Hydraulics → Structural Design-RCC → Irrigation Engineering → Highway Engineering → Engineering Survey → Water supply & sanitary → Soil Mechanics → Mechanics and structure → Construction Management → Building Construction → Estimating and Costing → Engineering Drawing → Building Material → Airport Engineering

Objective Box

→ Airport Engineering → Building Construction → Construction Management → Construction Materials → Engineering Drawing → Engineering Survey → Estimating and Costing → Highway Engineering → Fluid & Hydraulics → Soil Mechanics → Structural Design - RCC → Water Supply and Sanitary → Irrigation Engineering → Mechanics and Structure → Civil MCQ Set 1 → Civil MCQ Set 2 → Civil MCQ Set 3 → Civil MCQ Set 4

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