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    Gujarat Technological University

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    feyayel990
    This document is an exam for a course on Environmental Engineering. It contains 5 questions with multiple parts each. Question 1 asks about water treatment processes, wastewater characteristics, and drawing a flow chart of a water treatment plant. Question 2 covers design periods for wastewater systems and factors affecting water quality. Question 3 compares sedimentation processes and growth treatments, and asks to design a primary sedimentation tank. Question 4 involves sanitary sewer design and secondary treatment systems. Question 5 addresses noise pollution, environmental impact assessments, and solid waste landfilling. The exam tests a range of topics within environmental engineering.

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    Gujarat Technological University

    Uploaded by

    feyayel990
    46 views2 pages
    This document is an exam for a course on Environmental Engineering. It contains 5 questions with multiple parts each. Question 1 asks about water treatment processes, wastewater characteristics, and drawing a flow chart of a water treatment plant. Question 2 covers design periods for wastewater systems and factors affecting water quality. Question 3 compares sedimentation processes and growth treatments, and asks to design a primary sedimentation tank. Question 4 involves sanitary sewer design and secondary treatment systems. Question 5 addresses noise pollution, environmental impact assessments, and solid waste landfilling. The exam tests a range of topics within environmental engineering.

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    3160611

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    This document is an exam for a course on Environmental Engineering. It contains 5 questions with multiple parts each. Question 1 asks about water treatment processes, wastewater characteristics, and drawing a flow chart of a water treatment plant. Question 2 covers design periods for wastewater systems and factors affecting water quality. Question 3 compares sedimentation processes and growth treatments, and asks to design a primary sedimentation tank. Question 4 involves sanitary sewer design and secondary treatment systems. Question 5 addresses noise pollution, environmental impact assessments, and solid waste landfilling. The exam tests a range of topics within environmental engineering.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    46 views2 pages

    Gujarat Technological University

    Uploaded by

    feyayel990
    This document is an exam for a course on Environmental Engineering. It contains 5 questions with multiple parts each. Question 1 asks about water treatment processes, wastewater characteristics, and drawing a flow chart of a water treatment plant. Question 2 covers design periods for wastewater systems and factors affecting water quality. Question 3 compares sedimentation processes and growth treatments, and asks to design a primary sedimentation tank. Question 4 involves sanitary sewer design and secondary treatment systems. Question 5 addresses noise pollution, environmental impact assessments, and solid waste landfilling. The exam tests a range of topics within environmental engineering.

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    of 2

    Seat No.: ________ Enrolment No.

    ___________

    GUJARAT TECHNOLOGICAL UNIVERSITY


    BE - SEMESTER– VI (NEW) EXAMINATION – WINTER 2021
    Subject Code:3160611 Date:26/11/2021
    Subject Name:Environmental Engineering
    Time:10:30 AM TO 01:00 PM Total Marks: 70
    Instructions:
    1. Attempt all questions.
    2. Make suitable assumptions wherever necessary.
    3. Figures to the right indicate full marks.
    4. Simple and non-programmable scientific calculators are allowed.
    MARKS
    Q.1 (a) Explain the physical characteristics of water 03
    (b) Define BOD. Give the significance of BOD test for wastewater. 04
    (c) Draw a neat flow chart of a conventional water treatment plant. Enlist the 07
    function of each unit.

    Q.2 (a) What is design period? Explain the factors affecting the selection of the 03
    design period.
    (b) Find BOD(5,20) of a wastewater sample, if BOD(3,27) of the sample is 220 04
    mg/lit. Take kD value at 20̊ C as 0.1 day-1
    (c) Explain the factors affecting the self purification capacity of the river. 07
    OR
    (c) Explain the zones of pollution of a polluted stream 07

    Q.3 (a) Differentiate between plain sedimentation and sedimentation aided with 03
    coagulation
    (b) Differentiate between suspended growth and attached growth process. 04
    (c) Design a primary sedimentation for treating 8 MLD of water 07
    OR
    Q.3 (a) Why back washing is required in a rapid sand filter? What is the commonly 03
    used rate of back washing?
    (b) Explain with neat sketch, working of a flash mixer. 04
    (c) Explain different types of traps used in house drainage system. 07

    Q.4 (a) Explain how you will find the dry weather flow required for design of 03
    sewerage system.
    (b) Differentiate between activated sludge unit and trickling filter. 04
    (c) Calculate the diameter and discharge of a circular sewer laid at a slope of 1 07
    in 450 when it is running half full, and with a velocity of 1.0 m/s. Take
    Manning constant as 0.013.
    OR
    Q.4 (a) Draw a house drainage plan for a 3BHK detached bungalow. 03
    (b) Enlist different equipments that can be used to control suspended 04
    particulate matter. Explain working of any one of them in detail.
    (c) A single stage trickling filter is required to be designed to treat 3 MLD of 07
    sewage with BOD of 250 mg/L. Assume organic loading rate as 11000
    kg/ha-m/day and recirculation ratio as 1.0. What will be the BOD of the
    effluent?
    Q.5 (a) Enlist sources of noise pollution. 03
    (b) Define EIA. Draw a flow chart showing different steps involved in the EIA 04
    process.
    (c) Explain sanitary land filling used for solid waste disposal. 07
    1
    OR
    Q.5 (a) Find the head loss due to friction in a rising main using following data: 03
    1. Length of rising main= 750m
    2. Diameter of the pipe= 0.25m
    3. discharge= 1.5 m3/min
    4. Coefficient of friction= 0.0075.
    (b) Why EIA is required for achieving the goal of sustainable development. 04
    (c) Explain the effect of air pollution on human beings 07

    *************

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