Download GTU BE/B.Tech 2019 Summer 5th Sem New 2150603 Environmental Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 5th Sem New 2150603 Environmental Engineering Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?V (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2150603 Date: 31/05/2019

Subject Name: Environmental Engineering

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Explain growth pattern of bacteria based upon the numbers. 03
(b) Enlist and explain any two methods of population forecasting. 04
(c)
The BOD6 of a wastewater is determined to be 400 mg/L at 20
0
C. The k value at
20
0
C is known to be 0.23 per day. What would be BOD8 value if tests were run at
15
0
C?
07

Q.2 (a) Explain chemicals parameters of drinking water in detail. 03
(b) Write a short note on composting as a method of disposal of solid waste. 04
(c) A city discharges 110 cusec of sewage into a river, which is fully saturated
with oxygen and flowing at a rate of 1500 cusec during its lean days with
the velocity of 0.1 m/sec. the 5 days BOD of sewage at the given
temperature is 300 mg/l.find when and where the critical DO deficit will
occur in the downstream portion of the river and what is its amounts.
Assume coefficient of purification of the stream as 4.0 and deoxygenation
constant as 0.1
07
OR
(c) Explain 1
st
stage BOD and derive its formula with usual notations Lt=LO(1-
10
-Kt
).
07
Q.3 (a) Distinguish between BOD and COD 03
(b) Explain the difference between pyrlosis and incineration 04
(c) Explain the different components of houses drainage systems. 07
OR
Q.3 (a) Distinguish between aerobic and anaerobic decompositions of waste water. 03
(b) Explain the difference between primary and secondary pollutant. 04
(c) Explain solid waste collection services. 07
Q.4 (a) Explain the difference between Sound and noise. 03
(b) Explain effects of air pollution on human beings. 04
(c) Describe the device used for control of particulate matter. 07
OR
Q.4 (a) Explain noise rating systems. 03
(b) Explain effects of air pollution on plants. 04
(c) Explain control of noise pollution. 07
Q.5 (a) Explain the Difference between temporary hardness and permanent
hardness.
03
(b) Discuss the self purification of stream. 04
(c) Write short notes on various types of traps. 07
OR

Q.5 (a) Explain different factors affecting the water demand. 03
(b) Explain classification of solid waste. 04
(c) Describe role of microbes in the environment. 07
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