Environmental Engineering Basic Test

1. If the annual average hourly demand of the city is 10000m3, what is the maximum hourly consumption?

2700 m³

270000 m³

27000 m³

2700000 m³

2. The average quantity of water (in lpcd) required for domestic purposes according to IS code is ________

100

135

120

3. What is the fire demand of the city of 1lakh population by Buston’s formula?

5663000

56630

566300

5663

4. What is the design period for the water treatment unit?

30 years

15 years

10 years

20 years

5. Which of the following statement is correct?

Loss of water is more if the pressure in the distribution system is less

Water consumption is less in flush system

Rich class consumes less water

Intermittent water supplies leads to less water consumption

6. What are the factors affecting per capita demand?

Size of city, habit of people

Size of city

Cost of water, quality of water, size of city, habit of people

Cost of water, quality of water, size of city

7. If in a city, the maximum daily draft is 25MLD, fire draft is 35MLD and maximum hourly draft is 40MLD, what is the coincident draft?

60MLD

35MLD

25MLD

40MLD

8. The average consumption of water required in factories in lpcd is ___________

30-45

70-80

10-15

20-30

9. Match list 1(calculation of fire demand) with list 2 (formulae) and select the correct answer using the codes given below.

List 1	List 2
A. Kuchling's Formula	1) Q = 3182√P
B. Freeman's Formula	2) Q = 1136[P/5 +10]
C. Buston's Formula	3) Q = 5663√P
D. Central Congested High Value City	4) Q = 4637√P[1-.01√P]

where Q = quantity of water, P = population in thousands
CODE
A B C D

1 2 3 4

2 1 4 3

2 3 4 1

1 2 4 3

10. In which of the following units, design period is maximized?

Demand reservoir

Distribution system

Water treatment unit

Pipe mains