A. Bend
B. Junction
C. Change of gradient
D. All the above
Related Mcqs:
- 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 - Lead acetate test in sewer manhole is done to test the presence of ____________________?
A. Methane gas
B. Hydrogen sulphide
C. Carbondioxide gas
D. Diesel vapours - If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains__________________?
A. Hydrogen sulphide
B. Carbon dioxide
C. Methane
D. Oxygen - A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________?
A. Carbondioxide gas
B. Hydrogen sulphide gas
C. Methane gas
D. Petrol vapours - A manhole is classified as shallow if its depth is between_________________?
A. 0.4 to 0.5 m
B. 0.5 to 0.7 m
C. 0.7 to 0.9 m
D. 0.9 to 1.20 m - If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?
A. Hydrogen sulphide
B. Carbon dioxide
C. Methane
D. Oxygen - 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 - House connections to the laterals is generally made by___________________?
A. R.C.C.
B. P.C.C.
C. Cast iron
D. Glazed stonewares - The discharge per unit plan area of a sedimentation tank, is generally called________________?
A. Over flow rate
B. Surface loading
C. Over flow velocity
D. All the above
