Assertion A : The consumption of water increases with increase in the distribution pressure. Reason R : Higher distribution pressure causes more loss and waste of water. Select your answer according to the coding system given below?

A. Both a and r are true and r is the correct explanation of a
B. Both a and r are true but r is not the correct explanation of a
C. A is true but r is false
D. A is false but r is true

Which of the following causes a decrease in per capita consumption ?

A. Use of metering system
B. Good quality of water
C. Better standard of living of the people
D. Hotter climate

If the average daily consumption of a city is 100,000 m3, the maximum daily con¬sumption on peak hourly demand will be_______________?

A. 100000m3
B. 150000m3
C. 180000m3
D. 270000 m3

As compared to geometrical increase method of forecasting population, arithmetical increase method gives________________?

A. Lesser value
B. Higher value
C. Same value
D. Accurate value

The suitable method of forecasting popu¬lation for a young and rapidly increasing city is_________________?

A. Arithmetical increase method
B. Geometrical increase method
C. Incremental increase method
D. Graphical method

Select the correct relationship between porosity (N), specific yield (y) and specific retention (R)________________?

A. N = y + r
B. Y = n + r
C. R = n + y
D. R > (n + y)

Which of the following is not a water borne disease ?

A. Dysentery
B. Cholera
C. Typhoid
D. Maleria

The phenolic compounds in public water supply should not be more than_______________?

A. 0.1 ppm
B. 0.01 ppm
C. 0.001 ppm
D. 0.0001 ppm

The maximum discharge of a tube-well is about_________________?

A. 5 litres/sec
B. 50 litres/sec
C. 500 litres/sec
D. 1000 litres/see

Ground water is usually free from________________?

A. Suspended impurities
B. Dissolved impurities
C. Both suspended and dissolved impuri¬ties
D. None of the above