A. Lower end of ventilating column
B. Upper end of ventilating column
C. Upper end of the manhole
D. First step in manhole
Related Mcqs:
- You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at___________________?
A. Full depth
B. Half full
C. Two third full
D. Three fourth full - If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is_________________?
A. 100 cm
B. 90 cm
C. 80 cm
D. 50 cm - For sewers, inverted siphon is provided for___________________?
A. One pipe
B. Two pipes
C. Three pipes
D. Four pipes - A manhole is generally provided at each__________________?
A. Bend
B. Junction
C. Change of gradient
D. All the above - Ventilating shafts are provided to a sewer line at every__________________?
A. 100 m
B. 150 m
C. 200 m
D. 300 m - 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 - 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 - 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 - Assertion A.: A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R): It helps to accommodate the scum in the septic tank_________________?
A. Both A and R is true and R is the correct explanation of A
B. Both A and R is true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true - 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
