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SSC JE CE QUIZ _Environmental Engineering Booster Quiz -9

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Question 1

Zero hardness of water can be achieved by

Question 2

If 2% solution of a sewage sample is incubated for 5 days at 20 degrees and depletion of oxygen was found to be 5 ppm, BOD of the sewage is

Question 3

A 25 ml sample was diluted to 250 ml with odourless distilled water so that the odour of the sample no longer perceivable. What was the Threshold odour number?

Question 4

The operation of destruction of organic matter by having it served as food for bacteria, is carried out in

Question 5

The biochemical oxygen demand of treated water (Drinking water) should be

Question 6

The noise level decreases with distance following

Question 7

If the efficiencies of BOD removal of first and second stage trickling filter are each 70%, then what is the overall efficiency of filters?

Question 8

Find the population equivalent of a city whose water demand is 12 MLD. The 5 day BOD of the water sample taken was determined as 275 mg/l. BOD₅ of the water is 80 gm per person per day.

Question 9

Imhoff cone is used to measure

Question 10

Which of the following is a waterborne disease?

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Oct 26AE & JE Exams