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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SEVENTH SEMESTER B.TECH DEGREE EXAMINATION(S), MAY 2019

Course Code: CE405
Course Name: ENVIRONMENTAL ENGINEERING- I

PARTA
Answer any two full questions, each carries 15 marks.

What are the various sources of water available on the Earth?

What do you understand by the term ‘Design Period’?

Write a note on variation in rate of demand.

Explain Graphical comparison method of population forecasting.

The following is the population data of a city available from past census records.
Determine the population of the city in 2021 by (a) arithmetical increase method
(b) geometrical increase method (c) incremental increase method.

Year 1941 | 1951 | 1961 | 1971 | 1981 | | 1991 | 2001
Population | 12500 | 17000 | 27000 | 42000 | 58000 | 68000 | 74000
Prepare a standard chart giving the drinking water quality standards for any 10

parameters as per BIS.
With the help of neat sketches, describe any two types of intakes?

Explain any five chemical characteristics of water.

PART 0
Answer any two full questions, each carries 15 marks.

What is meant by coagulation? Enumerate the different coagulants used.

Design a continuous flow rectangular sedimentation tank for a population of
20,000 persons with an average per capita demand of 120 litres per day. Assume
detention period of 6 hours.

Design a clariflocculator for treating 3 MLD of water. Make suitable
assumptions. Prepare a neat sketch.

Explain the theory of filtration.

With a neat sketch, explain the working of a slow sand filter.

Compare slow sand and rapid sand filters.

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Duration: 3 Hours

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