Environmental Engineering QUESTIONS AND ANSWERS

Civil Engineering : Environmental Engineering QUESTIONS AND ANSWERS :: part5 : 16 to 20

Following Civil Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

16.Facultative bacteria are able to work in

presence of oxygen only

absence of oxygen only

presence as well as in absence of oxygen

presence of water

17.The rate of BOD exerted at any time is

directly proportional to BOD satisfied

directly proportional to BOD remain-ing ,

inversely proportional to BOD satisfied

inversely proportional to BOD re-maining

18.The most commonly used sewer under culverts is

circular brick sewer

circular cast iron sewer

semi-elliptical sewer

horse-shoe type sewer

19.Corrosion in concrete sewers is caused by

septic conditions

dissolved oxygen

chlorine

nitrogen

20.The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is

100

infinite

zero

More Environmental Engineering QUESTIONS AND ANSWERS available in next pages

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