The liquid wastes from kitchens, bath rooms and wash basins, is not called________________?
A. Liquid waste
B. Sullage
C. Sewage
D. None of these
Waste Water Engineering
Large diameter sewers subjected to external pressure alone, are reinforced ______________________?
Large diameter sewers subjected to external pressure alone, are reinforced ______________________?
A. Near the inner surface of the pipe
B. Near the outer surface of the pipe
C. Both A. and B.
D. With elliptical cage
The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is____________________?
The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is____________________?
A. 1.5
B. 2.0
C. 3.0
D. 4.0
For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is____________________?
For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is____________________?
A. Cast iron sewers
B. Cement concrete sewers
C. Glazed bricks sewers
D. Stone ware sewers
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is __________________?
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is __________________?
A. 5 m
B. 5.5 m
C. 6.5 m
D. 7 m
The normal values of over flow rates for secondary sedimentation tanks, ranges between__________________?
The normal values of over flow rates for secondary sedimentation tanks, ranges between__________________?
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 10,000 litres/sqm/day
If the pH value of sewage is 7__________________?
If the pH value of sewage is 7__________________?
A. It is acidic
B. It is alkaline
C. It is neutral
D. None of these
For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed________________?
For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed________________?
A. 1.5
B. 2.0
C. 2.5
D. 3.0
Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is__________________?
Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is__________________?
A. pt = 3H3p/2 Z5
B. pt = 2H3p/3 Z5
C. pt = 3H3p/2Z5
D. pt = 2 3p/3Z5
Ventilating shafts are provided to a sewer line at every__________________?
Ventilating shafts are provided to a sewer line at every__________________?
A. 100 m
B. 150 m
C. 200 m
D. 300 m