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.Management Sciences
Category: Water Supply Engineering
Surge tanks are used_______________?
0
A. for storage water
B. to increase the velocity in a pipeline
C. as overflow valves
D. to guard against water hammer
If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is______________________?
A. 1880 kilo litres
B. 2880 kilo litres
C. 3880 kilo litres
D. 4880 kilo litres
Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be________________?
A. nil
B. 5
C. 10
D. 15
E. 20
According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for________________?
A. Boarding schools
B. Nurses home and medical quarters
C. hostels
D. all the above
The maximum depth of sedimentation tanks is limited to________________?
A. 2 m
B. 3 m
C. 4 m
D. 5 m
E. 6 m
Disinfection of drinking water, is done to remove_________________?
A. odour
B. bacterias
C. turbidity
D. colour
The factor affecting per capita demand, is___________________?
A. size of the city
B. climatic conditions
C. pressure in water mains
D. cost of water
E. all the above
Aeration of water is done to remove______________?
A. odour
B. colour
C. bacterias
D. hardness
E. turbidity
The yield of a rapid gravity filter as compared to that of slow sand filter, is__________________?
A. 10 times
B. 15 times
C. 20 times
D. 30 times
E. 35 times
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