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PSC Civil Engg: Environmental Quiz 1

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Question 1

After which of the following treatment units, the turbidity is maximum?

Question 2

What is the rapid sand filter surface area required for filtering of 10 MLD water assuming a filtration rate of 100,000 l/m2/day?

Question 3

The energy content of a municipal solid waste is 15,000 kJ/kg (as discarded). If the moisture content of the MSW is 15% and ash content is 10%, the energy content on an ash free dry basis (in kJ/kg) is

Question 4

Consider the following statements related to ozone:
(i) Tropospheric ozone is harmful
(ii) Stratospheric ozone is beneficial
(iii) During prevalence of photochemical smog, O3 is formed
Which of the above statements are correct?

Question 5

As per manual on Sewerage and Sewage Treatment, Central Public Health and Environmental Engineering Organization, Ministry of Urban Development, Government of India, when as sewer connects with another sewer having a difference of 600 mm in level between the water lines (peak flow levels) of main line and the invert level of branch line, the connection may be provided using
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