A. 100 mm dia.
B. 150 mm dia.
C. 225 mm dia.
D. All of these
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Related Mcqs:
- 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...
- The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?
- A. 0.05552 cumec B. 0.05554 cumec C. 0.05556 cumec D. 0.0556 cumec...
- 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...
- If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is___________________?
- A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these...
- A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is____________________?
- A. 100 B. 1000 C. 5000 D. 10000...
- The gradient of sewers depends upon_________________?
- A. Velocity of flow B. Diameter of the sewer C. Discharge D. All the above...
- In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,______________?
- A. Is only provided B. Is doubled C. Is trebled D. Is not enough...
- If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is________________?
- A. 1 in 60 B. 1 in 100 C. 1 in 120 D. None of these...
- For design of sewers, percentage of sewage discharge is assumed_____________________?
- A. 65 to 70% B. 70 to 75% C. 75 to 80% D. 85%...
- If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is_____________________?
- A. 50 ppm B. 100 ppm C. 150 ppm D. 200 ppm...
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