Waste Water Engineering

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

A. The maximum rate of storm runoff is called peak drainage discharge
B. Rational method of estimating peak run off, may be used precisely for areas less than 50 hectares
C. The period after which the entire area starts contributing to the runoff, is called the time of concentration
D. All the above

A. 20 mm
B. 30 mm
C. 40 mm
D. 50 mm

A. Carry sewage as gravity conduits
B. Are designed for generating self-cleansing velocities at different discharge
C. Should resist the wear and tear caused due to abrasion
D. All the above

A. 0.05552 cumec
B. 0.05554 cumec
C. 0.05556 cumec
D. 0.0556 cumec

A. The water supply pipes carry pure water free from solid particles
B. The water supply pipes get clogged if flow velocity is less than self cleansing velocity
C. The sewers may be carried up and down the hills and valleys
D. The sewer pipes are generally laid along level hills

A. Biological activity of bacteria in sewage
B. Solubility of gases in sewage
C. Viscosity of sewage
D. All the above

A. Rivers
B. Seas
C. Lakes
D. None of these

A. Bacterias
B. Suspended solids
C. Sediments
D. Hardness

A. Inverted syphon
B. Depressed sewer
C. Sag pipe
D. all of these