Civil Engineering · all questions

Waste Water Engineering
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305

Questions

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Q141

For providing an Indian type W.C., the R.C.C. slabs in the toilet portion

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Q142

In Chezy’s formula

V = C rs

for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is

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Q143

Hydraulic mean radius is

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Q144

Hazen’s formula

V_{S} = 418 (G_{S} - G_{w}) d (\frac{3 T + 70}{100})

is used for the settlement velocity of the particles of diameter

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Q145

The sewer which resists sulphide corrosion, is

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Q146

The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called

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Q147

No treatment of the sewage is given if dilution factor is

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Q148

In septic tanks,

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Q149

The maximum diameter of sewers adopted in the designs is

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Q150

Which one of the following part of human body withstands minimum radiation?

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Q151

In a sludge tank, the gas mainly produced, is

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Q152

A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is

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Q153

The gas which may cause explosion in sewers, is

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Q154

Sludge banks are formed if sewage is disposed of in

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Q155

The rate of accumulation of sludge in septic tanks is recommended as

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Q156

In SI units the power of sound is represented in

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Q157

Disposal to sewage in large cities, is done in

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Q158

A well oxidized sewage contains nitrogen mainly as

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Q159

The settlement of a particle in sedimentation tank, is affected by

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Q160

Skimming tanks are

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