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
A. A jar
B. A breaker
C. A test tube
D. An Imhoff cone
A. 65 to 70%
B. 70 to 75%
C. 75 to 80%
D. 85%
A. Lower end of ventilating column
B. Upper end of ventilating column
C. Upper end of the manhole
D. First step in manhole