Online Quiz Environmental Engineering test1

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1. Which of the following causes a decrease in per capita consumption ?
use of metering system	good quality of water
better standard of living of the people	hotter climate

2. The hourly variation factor is usually taken as ______.
1.5	1.8
2.0	2.7

3. If the average daily consumption of a city is 100,000 m3, the maximum daily consumption on peak hourly demand will be _____.
100000m3	150000m3
180000m3	270000 m3

4. The distribution mains are designed for ______.
maximum daily demand	maximum hourly demand
average daily demand	maximum hourly demand on maximum day

5. As compared to geometrical increase method of forecasting population, arithmetical increase method gives _____.
lesser value	higher value
same value	accurate value

6. 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 ____.
9500	9800
10100	10920

7. The suitable method of forecasting population for a young and rapidly increasing city is _____.
arithmetical increase method	geometrical increase method
incremental increase method	graphical method

8. The depression of water table in a well due to pumping will be maximum
at a distance R from the well	close to the well
at a distance R/2 from the well	none of the above

9. The devices which are installed for drawing water from the sources are called _____.
aquifers	aquiclude
filters	intakes

10. Select the correct relationship between porosity (N), specific yield (y) and specific retention (R)
N = y + R	y = N + R
R = N + y	R > (N + y)

11. The type of valve, which is provided on the suction pipe in a tube-well, is _____.
air relief valve	reflux valve
pressure relief valve	sluice valve

12. The maximum discharge of a tube-well is about _____.
5 litres/sec	50 litres/sec
500 litres/sec	1000 litres/see

13. As compared to shallow-wells, deep wells have
more depth	less depth
more discharge	less discharge

14. Ground water is usually free from
suspended impurities	dissolved impurities
both suspended and dissolved impurities	none of the above

15. The polluted water is one which _____.
contains pathogenic bacteria	consists of undesirable substances rendering it unfit for drinking and domestic use
is safe and suitable for drinking and domestic use	is contaminated

16. Which of the following is not a water borne disease ?
dysentery	cholera
typhoid	maleria

17. The most common cause of acidity in water is ______.
carbon dioxide	oxygen
hydrogen	nitrogen

18. The phenolic compounds in public water supply should not be more than _____.
0.1 ppm	0.01 ppm
0.001 ppm	0.0001 ppm

19. The maximum permissible limit for flouride in drinking water is _____.
0.1 mg/litre	1.5 mg/litre
5 mg/litre	10 mg/litre

20. Standard EDTA (ethylene diamine tetra acetic acid) solution is used to determine the _____.
hardness in water	turbidity in water
dissolved oxygen in water	residual chlorine in water