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Council for Technical Education and Vocational Training{{CTEVT}}
Office of the Controller of Examinations
Sanothimi, Bhaktapur
Regular/ Back Exam-2079 Chaitra/ 2080 Baisakh
Program: Diploma in Civil Engineering/ Hydro Power Engineering
Full Marks:80
Pass Marks: 32
Year/ Part: III/II (2013,2017)
Time: 3 hrs.
Subject: Gravity Flow Water Supply System (Elective)
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.
Attempt any FIVE questions.
1. a) Define gravity flow water supply system. Write the importance of water supply scheme in present day community.
b) Explain different types of gravity flow water supply systems. Draw neat sketches.
2. a) Define safe yield. Explain the types of water demand.
b) Calculate the total daily water demand of a VDC for a scheme of design period of 20 years and population growth is 2.2% per year with the help of the following present data.
i) Population = 9050
ii) Cows & Oxen = 680
iii) Horse = 40
iv) Chicken = 2500
v) School
vi) Offices 1(with 450 day scholar students)
vii) Health Post
3. a) Describe/different methods of discharge measurement at the source of gravity flow water supply systems.
b) Why population survey is needed? Write what you mean by design period.
4. a) What are intakes? What are the important considerations which govern the site selection of an intake?
b) Explain about types of head losses in a pipe.
5. a) Why a tapstand is necessary in a water supply scheme? Describe its construction with a neat sketch.
b) Discuss the structural consideration and material requirements of reservoir tank.
6. Write short notes on: (any FOUR)
a. Sedimentation Tank
b. Spillway
c. Reservoir Tank
d. Importance of Topographical Survey
e. Valve Box
Good Luck!
