If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is_________________?
A. 50 mg/l
B. 100 mg/l
C. 150 mg/l
D. 250 mg/l
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 circular sewer section is preferred to because__________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering 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
In case of sewer lines_________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering 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 manhole is classified as shallow if its depth is between_________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering 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
The stone ware sewers_________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering A. Parabolic
B. Circular
C. Rectangular
D. New egged
A. Standard egg shaped
B. Circular shaped
C. Horse shoe shaped
D. Parabolic shaped
For trunk and out-fall, the type of sewers generally used, is_____________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering A. Glazed bricks sewers
B. Cast iron sewers
C. Cement concrete sewers
D. Stone ware sewers
In sewers the highest non-scouring velocity is achieved in________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering A. Degradation
B. Active decomposition
C. Recovery
D. Cleaner water