20 Nos. of Environment Engineering – water supply MCQ are given below:

Q1. The specific retention is least in

(a) coarse gravel

(b) sand

(c) clay

(d) silt


Ans: (a) coarse gravel

Q2. To determine the velocity of flow of ground water, the most commonly used non-empirical formula is

(a) Darcy’s formula

(b) Slichter’s formula

(c) Hazen’s formula

(d) Lacy’s formula


Ans: (a) Darcy’s formula

Q3. The location of a well is considered to be good, if it is suck into

(a) coarse gravel

(b) silt

(c) sand

(d) clay


Ans: (a) coarse gravel

Q4.  Water to the consumers may be supplied from

(a) rainy wells sunk to the water level

(b) infiltration well dug out on the banks of rivers

(c) infiltration galleries connected to sump well

(d) All of the above.


Ans: (a) rainy wells sunk to the water level

Q5. The most widely used tube well in India, is

(a) strainer well

(b) cavity well 

(d) perforated well

(c) slotted well


Ans: (a) strainer well

Q6. For insignificant effect on the water table as a thumb rule, the tube wells should be spaced as one in every

(a) 0.5 sq km

(b) 1.0 sq km 

(c) 1.5 sq km

(d) 2.0 sq km


Ans: (c) 1.5 sq km

Q7. “Shrouding” is provided

(a) Slotted type wells

(b) strainer wells

(c) cavity wells

(d) all the above


Ans: (a) Slotted type wells

Q8. Generally the maximum discharge from dugwell ranges

(a) 10 cu. m/hour

(b) 15 cu. m/hour

(c) 20 cu. m/hour

(d) 50 cu. m/hour


Ans: (c) 20 cu. m/hour

Q9. The maximum yield from a tube well is generally about

(a) 50 litres/sec 

(b) 30 litres/sec

(c) 20 litres/sec

(d) 10 litres/sec


Ans: (a) 50 litres/sec 

Q10. The suitable method for boring in hard rock, hard soil and boulder region is

(a) Percussion method

(b) rotary method

(c) core drilling

(d) jetting method


Ans: (a) Percussion method

Q11. Strainer type tube wells are considered unsuitable for

(a) coarse gravel

(b) fine sand strata

(c) clean gravel

(d) all the above


Ans: (b) fine sand strata

Q12. Per capita water demand is calculated in litres

(a) per person per day

(b) per person per month

(c) per person per year

(d) none of the above


Ans: (a) per person per day

Q13. Water demand of a city includes

(a) domestic water demand

(b) commercial and industrial demand

(c) fire and public-use demand

(d) all the above


Ans: (d) all the above

Q14. Under normal conditions, the average domestic consumption in India per person per day in litres is

(a) 105 

(b) 135

(c) 180

(d) 215


Ans: (b) 135

Q15. The total domestic consumption in a city as compared to total demand of the city is

(a) 20% 

(b) 30%

(c) 60%

(d) 75%


Ans: (c) 60%

Q16. Industrial and commercial water demand in a city as compared to total demand of the city is

(a) 10 to 15% 

(b) 15 to 20%

(c) 20 to 25%

(d) 30 to 40%


Ans: (c) 20 to 25%

Q17. As per norms, 45 litres of water per person per day is provided in case of

(a) hotels

(b) hospitals

(c) office buildings

(d) public places


Ans: (c) office buildings

Q18. In a city having population approximately as 8 lakhs, the per capita demand of water will be

(a) 200 to 250 litres

(b) 180 to 200 litres

(c) 160 to 180 litres

(d) 100 to 120 litres


Ans: (b) 180 to 200 litres

Q19. Per capita consumption will be higher if

(a) pressure in distribution system will be more

(b) quality of water will be good

(c) the living standard of people is higher

(d) all the above are correct


Ans: (d) all the above are correct

Q20. Per capita consumption is highest in

(a) schools

(b) hospitals

(c) offices

(d) factories


Ans: (b) hospitals