The factor affecting per capita demand, is___________________?

Related Mcqs:

1. 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

2. As per IS : 1172-1963, water required per head per day for average domestic purposes, is_______________?

   A. 50 litres
   B. 65 litres
   C. 85 litres
   D. 105 litres
   E. 135 litres

3. The fire demand of a city may be worked out by _________________?

   A. Kuichling’s formula
   B. Freeman formula
   C. Under Writers formula
   D. Bustan’s formula
   E. All the above.

4. Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be________________?

   A. nil
   B. 5
   C. 10
   D. 15
   E. 20

5. Time of concentration________________?

   A. is the time taken, for precipitation
   B. duration of rainfall.
   C. time taken for all the ran off to reach the drain
   D. time taken for the storm water to travel from the most remote point to the drain

6. The specific retention is least in case of_______________?

   A. Clay
   B. Sand
   C. Silt
   D. Coarse gravel

7. In slow sland filters, the turbidity of raw water can be removed only up to_________________?

   A. 60 mg/litre
   B. 75 mg/litre
   C. 100 gm/litre
   D. 150 mg/litre

8. Sunlight_________________ ?

   A. helps growth of bacterias
   B. impedes growth of algae
   C. increases dissolved oxygen content
   D. reduces turbidity

9. By boiling water, hardness can be removed if it is due to_________________?

   A. calcium sulphate
   B. magnesium sulphate
   C. calcium nitrate
   D. calcium bicarbonate
   E. none of these

10. The least thickness of class B cast iron (spun) pipe, is_________________?

    A. 7.2 mm
    B. 7.9 mm
    C. 8.6 mm
    D. 10 mm