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Reg No.:_ Name:_

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

Course Code: CE405
Course Name: ENVIRONMENTAL ENGINEERING- I

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two full questions, each carries 15 marks. Marks

1 a) Discuss the method of arriving at the quantity of water to be supplied 10 2 (7)

community.

b) Compare the different sources of water for selecting them as a source for a water (3)
supply project.

c) Define MPN . Explain the significance of determining the same. (3)

2 a) Enlist any eight important chemical characteristics of raw water. Mention the (6)
method of analysis and its acceptable value as per drinking water quality
standards of any three of them.

b) The population of a city in three consecutive years 1.0. 1991, 2001 and 201115 (9)
80,000; 250,000 and 480,000, respectively. Determine (a) The saturation
population, (b) The equation of logistic curve, (c) The expected population in
2021.

3 a) Define intake as referred in a water supply system and distinguish between Dry (8)
intake and wet intake. Also list the important factors governing the selection of
site for the selection of an intake

b) What are the points which needs consideration while selecting location for a (7)
pumping station? Compute the cost of electric energy in a month for a pump
which is operated 8 hours daily for 30 days, The pump lifts 93600 litres of water
per hour against a total head of 25 m. Pump has an efficiency of 75% and the

electric motor have an efficiency of 80% .The cost of electric energy is Rs 15 per

unit.
PART B
Answer any two full questions, each carries 15 marks.
4 a) Distinguish between Type I and Type 11 settling of suspended particles. (4)
b) Describe any two mixing devices of coagulants with figure. (6)

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