In a sludge tank, the gas mainly produced, is_________________?

Related Mcqs:

If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is_________________?

A. 100 cm B. 90 cm C. 80 cm D. 50 cm...

The pH value of fresh sewage is usually ______________________?

A. Equal to 7 B. More than 7 C. Less than 7 D. Equal to zero...

Disposal to sewage in large cities, is done in__________________?

A. Irrigation B. Dilution C. Oxidation D. Purification...

The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is____________________?

A. 100 cm B. 110 cm C. 120 cm D. 150 cm...

The settlement of a particle in sedimentation tank, is affected by_____________________?

A. Velocity of flow B. Viscosity of water C. Size and shape of solid D. All the above...