Gujarat Technological University 2011 M.E Water Supply & Drainage - Question Paper
Seat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY ME Semester -III Examination Dec. - 2011
Subject code: 731201
Date: 05/12/2011
Total Marks: 70
Subject Name: Water Supply & Drainage
Time: 10.30 am - 01.00 pm
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
(a) How will you arrive at the treatment plant capacity for a proposed water treatment plant of a town?
(b) Draw the layout plan and section of a typical surface water treatment plant.
(a) Write short note on elevated service reservoir.
(b) How will you decide the capacity of the pump for lifting water?
Q.1
07
07
Q2
07
07
07
07
07
07
07
OR
(b) Describe fire hydrants"
Describe Hardy cross method for analysis of pipe networks.
Write short note on centrifugal pumps.
OR
Discuss briefly the rational method to determine the flow of storm water. The following data is available regarding the various types of area and the corresponding impermeability factors (C). If the maximum intensity of rainfall is 40mm/hour, calculate the discharge of storm water which will reach the sewer line. Use rational formula.
Q.3
(a)
(b)
(a)
(b)
Q.3
|
Types of Surface |
% area |
Run off co-efficient |
|
Roofs |
35 |
0.9 |
|
Pavement & Yards |
20 |
0.85 |
|
Lawn & Gardens |
30 |
0.15 |
|
Vacant Plots |
15 |
0.10 |
Are storm sewer designed for full flow conditions? Why? Discuss in details.
Calculate the velocity of flow and discharge in storm sewer of circular section having diameter of 1.5 m laid at a gradient of 1 in 450. Assume sewer is running half full.
OR
Explain the following:
(i) Non silting velocity
(ii) Non scouring velocity
Determine the diameter of a storm sewer to carry storm discharge of 0.75 m3/sec. The sewer is to be designed to run half full.
Q4
(a)
(b)
07
07
Q.4 (a)
07
Q.5 (a) State the head losses in the following fixtures: 07
(i) Bend
(ii) Gate valve
(iii) Elbow
(iv) Reducers
(v) Sudden expansion
(vi) Sudden contraction
(b) Explain how you will find out pressure at point B in following diagram. 07
Plan of the Pipe Line
OR
Q.5 (a) Explain the following terms 07
(i) Hydraulic jump
(ii) Specific energy & specific energy curves
(iii) Foudes number and its usefulness.
(b) A trapezoidal channel having side slopes of 2 vertical to 1 horizontal has 07 base width of 1.8 m carries water at a depth of 1.2 m. If the slope of channel is 1 in 300. Find out discharge carried by the channel.
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Attachment: |
| Earning: Approval pending. |
