Waste Water Engineering

A. 25,000 to 35,000 litres/sqm/day
B. 40,000 to 50,000 litres/sqm/day
C. 50,000 to 60,000 litres/sqm/day
D. 80,000 to 100,000 litres/sqm/day

A. A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided
B. The outlet invert level is kept 5 to 7.5 cm below the inlet invert level
C. The minimum width of septic level is 90 cm
D. The depth of tank is kept equal to its width

A. Combined system
B. Partially separate system
C. Separate system
D. None of these

A. Fertilizer
B. Building material
C. Chemical for lowering B.O.D.
D. Base material for paints

A. Separate system
B. Combined system
C. Partially combined system
D. None of these

A. 0°C
B. 15°C
C. 20°C
D. 25°C

A. Manholes are provided in sewer pipes at suitable intervals
B. Catch basins are generally provided in sewers for carrying drainage discharge
C. Inlets are generally provided in all sewers
D. None of these

A. 25 %
B. 50 %
C. 10 %
D. 5 %

A. Initial demand
B. First stage demand
C. Carbonaceous demand
D. All of these

A. 1.250 D
B. 1.350 D
C. 1.425 D
D. 1.625 D