Question bank for Limited Departmental Competitive Examination (LDC) examination Sanitary Engineering
Categories: Interview questions and answers Study Indian railways interview questions
Question bank for Limited Departmental Competitive Examination (LDC) examination Sanitary Engineering
1. Sewerage system of a railway colony may be
- Combined system
- Separate system
- Partially combined system
- Any of them
Answer: Any of them
2. The capacity of high level flushing cistern is generally
- 7.5 ltrs.
- 10 ltrs.
- 12.5 ltrs.
- None of these
Answer: 10 ltrs.
3. Self-cleaning velocity of a sewer line depends upon
- Diameter of sewer
- Gradient of ewer line
- Type of sewerage
- All of them
Answer: All of them
4. For design of sewers for sullage, minimum velocity of ---- metres per second is taken.
- 1.0 m sec
- 1.5 m/sec
- 2.0 m/sec
- 2.5 m/sec
Answer: 1.0 m sec
5. For achieving self-cleaning velocity, a minimum velocity of ---- mps. Is desirable for design peak flow
- 0.6 mps
- 0.8 mps
- 1.0 mps
- 2.0 mps
Answer: 0.8 mps
6. Indicate which of the statement is incorrect
- The detritus tank is type of a grit chamber
- In detritus tank, velocity of flow is further reduced
- Grit chambers are provided in the sewage treatment process to remove the heavier inorganic matter as grit, sand etc. from the sewage
- None of them
Answer: None of them
7. In case of septic tank, the length (L) to width (B) ratio is generally
- L = 3 B
- L = 5 B
- L = 1.5 B
- L = B
Answer: L = 3 B
8. Effective depth of septic tank of 10 users is about
- 1.0 m
- 1.2 m
- 1.7 m
- 2.0 m
Answer: 1.2 m
9. Free board given in septic tank is about
- 100 mm
- 200 mm
- 300 mm*
- 500 mm
Answer: 300 mm
10. The internal size of bio latrine tank is
- 1200mm. x 1200mm. x 670mm.
- 1200mm. x 670mm. x 1200mm.*
- 1200mm. x 760mm. x 1200mm.
- None of these
Answer: 1200mm. x 670mm. x 1200mm