The rate of accumulation of sludge per person per year, is_______________________?
A. 10 litres
B. 15 litres
C. 20 litres
D. 25 litres
Civil Engineering Mcqs
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,______________?
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,______________?
A. Is only provided
B. Is doubled
C. Is trebled
D. Is not enough
The flow velocity in detritus tanks is________________?
The flow velocity in detritus tanks is________________?
A. 0.05 m/sec
B. 0.09 m/sec
C. 1.25 m/sec
D. None of these
The water carried sewerage system removes__________________?
The water carried sewerage system removes__________________?
A. Domestic sewage
B. Industrial sewage
C. Storm sewage
D. All the above
The asbestos cement pipes are generally laid___________________?
The asbestos cement pipes are generally laid___________________?
A. Horizontally
B. Vertically
C. At an angle of 30°
D. At an angle of 60°
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of______________?
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
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_________________?
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 circular sewer section is preferred to because__________________?
A circular sewer section is preferred to because__________________?
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
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is_____________________?
In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is_____________________?
A. 5
B. 10
C. 15
D. 20
In case of sewer lines_________________?
In case of sewer lines_________________?
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