Design of Hydraulic Structures 2018 Question Paper — Government Colle…
The 2018 Design of Hydraulic Structures previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Design of Hydraulic Structures
- Course: Design of Hydraulic Structures
- Branch: Civil Engineering
- Year: 2018
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt five questions in all selecting at least one question from each Unit.
- Each question carries 20 marks.
- Assume missing data, if any.
Questions
UNIT -I
- Q1.a. State the considerations for the selection of an earthen dam at a particular site. What are the different types of earthen dams and the circumstances under which they are recommended? [10 marks]
- Qb. What is meant by 'best central angle of an arch dam'? Derive its value. [10 marks]
- Q2.a. Explain in detail various forces causing instability in Gravity dams. [10 marks]
- Qb. Locate the Phreatic line for an earth dam having following data: Deepest level of river bed = 80 m H.F.L of the reservoir = 97.5 m Level of top of the dam = 100 m top width of the dam = 4.5 m Slope of upstream face = 1 in 3 Slope of downstream face = 1 in 2 Coefficient of permeability of dam material = 5.0 x 10⁻⁶ m/s [10 marks]
UNIT -II
- Q3.a. What is Siphon spillway? Sketch a saddle siphon spillway and explain the functions of its various component parts. [10 marks]
- Qb. Briefly explain Khosla's theory on the design of weirs on permeable foundation and the corrections needed in the application of this theory . [10 marks]
UNIT -III
- Q4.a. Explain the causes of failure of weirs and the remedies proposed to prevent their failure. [10 marks]
- Qb. For the impervious floor shown in figure, determine analytically the uplift pressure at points C₁ and E₂. [10 marks]
- Q5.a. Why it is necessary to control silt entry in the canal? What methods are adopted for the purpose? [10 marks]
- Qb. What do you understand by launching apron? How is it designed? [10 marks]
- Q6.a. Design a suitable cross drainage work using the data given below: Canal: Full supply level = 2135 m Full surface discharge = 32 cumecs Canal bed level = 212 m Canal bed width = 20 m Trapezoidal canal section = 1.5 : 1 Drainage : High flood depth = 2.5 m High flood level = 210 m High flood discharge = 300 cumecs General ground level = 212.5 m [20 marks]
UNIT -IV
- Q7.. Design a straight glacis fall on the branch canal with following particulars: Full supply discharge upstream/downstream = 100 cumecs Full supply level upstream/downstream = 125.0/153.5 Full supply depth upstream/downstream = 2.0 m Bed width of canal upstream/downstream= 55.0 m Bed level upstream/downstream = 123.0 m/ 121.5 m Permissible exit gradient = 1/5. [20 marks]
- Q8.. Design a distributary head regulator for the following data: Table: - Full supply discharge (cumecs): Parent channel = 100, Off-take channel = 15 - Full supply level (m): Parent channel = u/s = 218.10, d/s = 217.90; Off-take channel = 217.10 - Depth of water (m): Parent channel = 2.5, Off-take channel = 1.5 - Bed width (m): Parent channel = u/s = 42, d/s = 38; Off-take channel = 15 Take safe hydraulic gradient as 1 in 6. Assume C₁ = 0.557, C₂ = 0.80. [20 marks]