A. Without entry ladders
B. Without manhole covers
C. With depths more than 3.5 m
D. Having drains at different levels
Related Mcqs:
- Drop manholes at the junctions of sewer lines, are provided if________________?
A. Invert level of a branch sewer is more than 60 cm that of the main sewer
B. Sewer line runs along a main road
C. Ordinary manhole cannot be built
D. Two sewer lines intersect - For large sewers, maximum distance between manholes may be_______________?
A. 50 m
B. 100 m
C. 200 m
D. 300 m - The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is____________________?
A. 20 m
B. 30 m
C. 45 m
D. 75 m - Sewer manholes are generally provided at________________?
A. The change of gradient
B. The change of direction
C. The junctions of sewers
D. All of these - The drop man holes are generally provided in sewers for____________________?
A. Industrial areas
B. Large town ships
C. Hilly town ships
D. Cities in plains - A drop manhole is provided if__________________?
A. A sewer drops from a height
B. A branch sewer joins the main sewer at higher level
C. A lamp is inserted to check obstruction
D. None of these - The difference of pressure between the inside and outside of a liquid drop is_____________?
A.p = Txr
B.p = T/r
C. p = T/2r
D.p = 2T/r
E. none of the above - The difference of pressure between the inside and outside of a liquid drop is________________?
A.p = Txr
B.p = T/r
C. p = T/2r
D. p = 2T/r
E. none of the above - The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is__________________?
A. 0.10 cumec
B. 0.12 cumec
C. 0.15 cumec
D. 0.20 cumec - In trickling filter, B.O.D. is reduced to___________________?
A. 30 to 40%
B. 40 to 60%
C. 60 to 80%
D. 80 to 90%
