Environmental (1-20)

Updated: Apr 8, 2020

1.The consumption of water increases with increase in the distribution

pressure-Higher distribution pressure causes more loss and waste of water.

Select your answer according to the coding system given below


 

2.The per capita consumption of a locality is affected by

-climatic conditions,quality of water,distribution pressure

 

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

-use of metering system

 

4.The hourly variation factor is. usually taken as-1.5


 

5.If the average daily consumption of a city is 100,000 m3, the maximum daily consumption on peak hourly demand will be-270000 m 3


 

6.The distribution mains are designed for-maximum hourly demand on maximum day


 

7.As compared to geometrical increase method of forecasting population, arithmetical increase method gives-lesser value


 

8.The population of a town in three consecutive years are 5000, 7000 and 8400 respectively. The population of the town in the fourth consecutive year according to geometrical increase method is-10920


 

9.The suitable method of forecasting population for a young and rapidly increasing city is-geometrical increase method


 

10.The depression of water table in a well due to pumping will be maximum-close to the well


 

11.The devices which are installed for drawing water from the sources are called-

intakes

 

12.Select the correct relationship between porosity (N), specific yield (y) and

specific retention (R)

-N = y + R

 

13.The type of valve, which is provided on the suction pipe in a tube-well, is

-reflux valve

 

14.The maximum discharge of a tube-well is about-50 litres/sec


 

15.As compared to shallow-wells, deep wells have-more discharge


 

16.Ground water is usually free from-suspended impurities


 

17.The polluted water is one which-consists of undesirable substances

rendering it unfit for drinking and domestic use


 

18.Which of the following is not a water borne disease ?-maleria


 

19.The most common cause of acidity in water is-carbon dioxide


 

20.The phenolic compounds in public water supply should not be more than-0.001 ppm

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