Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 6th Semester (Sixth Semester) 2018-2019 RCE 602 Environmental Engineering Question Paper
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B. TECH.
(SEM?VI) THEORY EXAMINATION 2018-19
ENVIRONMENTAL ENGINEERING
T ime: 3 Hours T and Marks: 70
Note: Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
a. What is a design period?
b. Write the name of common impurities found in water.
0. Name the different pipe appurtenances.
(1. Explain BOD and COD.
e. Enumerate the total amount of solid waste present in water.
f. Calculate one day 37?C BOD of sewage sample whose 5 days BOD is 100mg/1.
g. What are the effects which occur on water after filtration?
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
a. What are the various methods to forecast the population growth in an area?
Explain suitability of any four methods.
b. A storage reservoir is situated at a distance of 6 km from a city of 3 lakh
population. The total loss of head from the source to the city is not exceed 20
m. taking the daily demand of 200 l/capita/day, pumping is to be done for 12
hours only, determine the size of supply main by
i. Darcy ? Weisbach formula taking coefficient of friction as 0.015
ii. Hazen Williams formula taking C = 130. Assume minor losses = 10
V2/2g.
c. Explain the importance of determining solids dissolved in water. How do you
determine the amount of solids dissolved in waste water.
(1. Write the equation for temperature dependence of BOD. If the BOD5 of a waste
is 103 mg/L and the BOD20 (corresponds to the ultimate BOD) is 160 mg/L,
what is BOD rate constant?
e. Elaborate the various water supply systems with reference to Indian context.
SECTION C
3. Attempt any one part of the following: 7 x 1 = 7
(a) The average sewage ?ow from sewage is 80 X106 L/D. If the average 5 day
BOD is 285 mg/l. Calculate the total 5 day oxygen demand in kg and
population equivalent of sewage. Assume per capita demand of BOD per day is
75 g.
(b) Write a note on various shapes of sewer sections.
4. Attempt any one part of the following: 7 x 1 = 7
(a) Explain in detail absorption and ion exchange process of treatment of waste
water.
(b) Discuss in detail the ways to remove hardness of waste water and the chemicals
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Printed Pages: 02 Sub Code: RCE 602
involved in hardness.
5. Attempt any one part of the following: 7 x 1 = 7
(a) Why are coagulants used in waste treatment? List various coagulants used in
the process.
(b) A stone?ware sewer, 30 cm in diameter is laid at a gradient of 1 in 100. Using
N = 0.013 in manning?s formula, calculate the velocity and discharge when
sewer is running full.
6. Attempt any one part of the following: 7 x 1 = 7
(a) What do you understand by per capita demand? How is per capita demand for a
community estimated? Also explain the factors which affect the per capita
demand.
(b) Explain activated sludge treatment in detail.
7. Attempt any one part of the following: 7 x 1 = 7
(a) What are gravity and pressure conduits? Why pressure conduits are most
commonly used for conveying water from distant sources to the town for
supply?
(b) What are the main sources of water pollution in industrial township?
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This post was last modified on 29 January 2020