Environmental Engineering solved MCQs

1 of 16

1. Which system of collection of sewageis a dry system?

a. conservancysystem

B. biologicaldigestion

c. incernation

d. water carriagesystem

2. After how many years, night soil givesgood quality manure?

a. 1

B. 5

c. 10

d. 14

3. Conservancy system is a highly unhygienic system, causing insanitary conditions.

a. true

B. false

4. Which of the following is not correct regarding conservancy system?

a. high maintenance cost

B. highly unhygienic system

c. independent of labour

d. chances of epidemic

5. Which system of collection of sewageis called a dry system?

a. conservancysystem

B. biologicaldigestion

c. incernation

d. water carriagesystem

6.                  is a method where water is used as a medium for the flow of sewage from its production of the treatment unit.

a. conservancy system

B. biological digestion

c. ) incernation

d. d) water carriage system

7. The water carriage system is a hygienic system without any bad smell.

a. true

B. false

8. Which of the following is correct regarding water carriage system?

a. chances of the epidemic is there

B. foul smell is produced

c. does not cause pollution

d. highly dependent on labours

9. Which of the following is an advantage of a separate water carriage system?

a. get choked easily

B. difficult to clean the sewer

c. two sets of sewer are used

d. the more uniform character of sewage

10. Which of the following is a disadvantage of a separate water carriage system?

a. low installation charge

B. no loads on treatment units

c. lesser air contact with small sized sewer

d. provision of the automatic flushing tank is not required

11. provides only one sewer to carry both foul sewage and rainwater.

a. separate water carriage system

B. combined water carriage system

c. partially combined water carriage system

d. conservancy system

12. Which of the following is an advantage of the combined water carriage system?

a. there is more air in large sewer

B. there is the inclusion of storm water

c. there is difficulties in ventilation of large sewer

d. overflowing of sewer

13. Which of the following is incorrect regarding partially combined water carriage system?

a. the sewers are of reasonable size

B. there is choking of sewer

c. the storm water increases load on treatment units

d. the storm water increases the cost of pumping

14. The choice of combined water carriage system does not depend on

a. space consideration

B. even rainfall pattern

c. steep topography

d. pumping requirements

15. is the flow through sewers available during non-rainfall period.

a. gradually varied flow

B. rapidly varied flow

c. dry weather flow

d. storm water flow

16. is the additional flowoccurring during rainy season.

a. gradually variedflow

B. rapidly variedflow

c. dry weatherflow

d. storm waterflow

17. Which flow is also called as sanitarysewage?

a. dry weather flow

B. storm weatherflow

c. uniform flow

d. non uniformflow

18. Which of the following factor does noteffect the dry weather flow?

a. rate of watersupply

B. temperatureconditions

c. populationgrowth

d. infiltration ofground water

19. The sewer should be designed for a minimum of              litres of waste water per capita per day.

a. 50

B. 100

c. 150

d. 1000

20. is the process in which ground water unfiltrate into the sewers.

a. exfiltration

B. infiltration

c. filtration

d. osmosis

21.                  is the process which indicates the flow of waste water from the sewer into the ground.

a. exfiltration

B. infiltration

c. filtration

d. osmosis

22. The peaking factor is defined by

a. peak flow *average flow

B. peak flow –average flow

c. peak flow +average flow

d. peak flow /average flow

23. The peaking factor is directly proportional to the population of the city.

a. true

B. false

24. The wet weather flow is also known by

a. minimum sewageflow

B. maximum sewageflow

c. storm waterflow

d. average rate offlow

25. Which of the following surface has a maximum Kuichling’s impermeability factor?

a. gravel road

B. water tight roof surface

c. unpaved surface

d. macadamized road ways

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