Water Supply and Sanitary

151) The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is

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4 ppm

152) In facultative stabilization pond, the sewage is treated by

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dual action of aerobic bacteria and anaerobic bacteria

153) The working conditions in imhoff tanks are

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anaerobic in lower compartment and aerobic in upper compartment

154) Under natural conditions of flow, an unpolluted river would contain

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less dissolved oxygen in summer than in winter

155) Electrical conductivity (EC) of water and total dissolved solids (TDS) are interrelated. value of EC will

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increase with increase in TDS

156) The construction of impounding reservoir is required when

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the rate of flow in the stream, in dry season is less than the demand

157) Which one of the following pairs is not correctly matched?

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Oxidation ditch ... algae

158) Conservation system is best suited

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when man power is cheap

159) Water carriage system needs more

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water

160) Separate system is adopted in

Discuss in Comment

steep rocky slopes

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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