A. 50 mg/l
B. 100 mg/l
C. 150 mg/l
D. 250 mg/l
A. It is cheaper in construction
B. It provides maximum area for a given perimeter
C. It provides maximum hydraulic mean depth
D. All the above
A. 5
B. 10
C. 15
D. 20
A. Water test is carried out to check water tightness of the joints
B. Test for straightness is carried out with the help of a lamp and mirror
C. Obstruction test is carried out with the help of smooth ball of diameter 13 mm
D. All the above
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
A. Are used for carrying sewage and drainage from houses
B. Are manufactured from clays and shale
C. After casting are dried and burnt at temperature 150°C, 700°C and 1200°C
D. All the above
A. Parabolic
B. Circular
C. Rectangular
D. New egged
A. Standard egg shaped
B. Circular shaped
C. Horse shoe shaped
D. Parabolic shaped
A. Glazed bricks sewers
B. Cast iron sewers
C. Cement concrete sewers
D. Stone ware sewers
A. Degradation
B. Active decomposition
C. Recovery
D. Cleaner water