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PSC Civil Engg: Environmental Quiz 9

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Question 1

Which of the following help to prevent water pollution due to land-disposal of waste?
(i) Proper consolidation of waste to reduce pore space and permeability
(ii) Disposal over impervious strata
(iii) Layer of impervious soil on the top and the sides of the deposited solid waste

Question 2

Consider the following statements in respect of electrostatic precipitators:
(i) Power requirement is very small compared to other air pollution control devices and so they are cheaper to perform than other devices.
(ii) Can handle both gases and mists for high volume flow.
(iii) Very small particles can be collected, either wet or dry.
Which of the above statements are correct?

Question 3

Match List-I (Equipment) with List-II (Parameter) and select the correct answer using the codes given below the lists:
Description: F:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-IES-CE-26-April\GATE-IES-CE-Environmental-Engineering_files\image032.png

Question 4

A certain water needs alum treatment to the extent of 10 p.p.m. How much alum, in quintals per day, would be needed to treat 10 MLD of water ?

Question 5

The Sludge Volume Index for mixed liquor having suspended solids concentration of 2000 mg/l and showing a settled volume of 200 ml from a one litre sample would be
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