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- Question
The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is
Options- A. 100 cm
- B. 110 cm
- C. 120 cm
- D. 150 cm.
- Correct Answer
- 120 cm
- 1. Pick up the correct statement from the following :
Options- A. Inlets are provided on the road surface at the lowest point for draining rain water
- B. Inlets are generally provided at an interval of 30 m to 60 m along straight roads
- C. Inlets having vertical openings, are called curb inlets
- D. Inlets having horizontal openings, are called horizontal inlets
- E. All the above. Discuss
- 2. For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by
Options- A. Kinchling
- B. Lloyd Davis
- C. Frubling
- D. all the above. Discuss
- 3. The most effective arrangement for diverting excess storm water into a natural drainage, is
Options- A. leaping weir
- B. overflow weir
- C. siphon spill way
- D. none of these. Discuss
- 4. The detention time (t) of a settling tank, may be defined as the time required for
Options- A. a particle to travel along its length
- B. a particle to travel from top surface to bottom sludge zone
- C. the flow of sewage to fill the tank
- D. none of these. Discuss
- 5. The maximum depth of sedimentation tanks, is kept
Options- A. 3 m
- B. 3.5 m
- C. 4 m
- D. 4.5 m. Discuss
- 6. Discrete or granular particles change their
Options- A. size
- B. shape
- C. weight
- D. none of these. Discuss
- 7. 'Cowl' is provided at
Options- A. lower end of ventilating column
- B. upper end of ventilating column
- C. upper end of the manhole
- D. first step in manhole. Discuss
- 8. Large diameter sewers subjected to external pressure alone, are reinforced
Options- 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
- E. none of these. Discuss
- 9. The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is
Options- A. 20 cm
- B. 25 cm
- C. 40 cm
- D. 50 cm
- E. 60 cm. Discuss
- 10. During putrifaction process of sewage the gas given off, is
Options- A. carbon dioxide
- B. hydrogen
- C. ammonia
- D. methane
- E. all the above. Discuss
Waste Water Engineering problems
Search Results
Correct Answer: All the above.
Correct Answer: all the above.
Correct Answer: siphon spill way
Correct Answer: the flow of sewage to fill the tank
Correct Answer: 3 m
Correct Answer: none of these.
Correct Answer: upper end of ventilating column
Correct Answer: with elliptical cage
Correct Answer: 50 cm
Correct Answer: all the above.
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