HCS HPSC Mains Optional 2003: Civil Engineering Frontier IAS

# HCS HPSC Mains Optional 2003: Civil Engineering Frontier IAS

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## HCS Mains 2003- Civil Engineering Optional Paper

### HCS HPSC Mains Optional 2003: In this post, we will discuss the HCS mains 2003 optional Civil Engineering paper.

Time: 3 hours                                                                                                                    Marks:150

Note: Attempt any Five questions. All questions carry equal marks. Q. No. 1 is compulsory. Answer two questions from Part I and two Questions from Part II. The parts of the same question must be answered together and must not be interposed between answers to other questions.

1. Attempt any four of the following: 4×7.5=30 marks
(a) Distinguish between method of joints and method of sections. Which is the appropriate method for influence lines? Illustrate the method by constructing the influence line for the force in a diagonal member of Pratt truss with inclined top chord members.
(b) Write short notes on consolidated quick tests on sands and critical void ratio.
(c) Derive the condition  What type of flow condition is indicated by this equation.
(d) State Abram's Law. Describe how both strength and workability can be ensured in concrete mix.
(e) Write short note on reciprocal leveling.
(f) Briefly describe any two turbidity tests for drinking water.

### Part-I

2. (a) A symmetric, three hinged parabolic arch of span 'L' and height 'h' carries a concentrated load at a distance of 'z' from left support. The moment at a section distant 'x' from the left support is zero. Derive the value of 'z' in terms of L,h, and x. 20 marks
(b) Derive an expression to obtain depth of embedment of cantilever sheet piles in cohesive soils. 10 marks

3. (a) An earthen bank embankment is to be constructed for an important highway. Explain briefly what preliminary investigations are required with regard to
(i) selection of embankment material.
(ii) selection of proper procedure of construction.
list the tests to be done for quality control. 15 marks
(b) Two pipes each of length 'l' and diameters D1 AND D2 are arranged in parallel. when total discharge Q flows through them. The head loss is h1. if the pipes are in series and total discharge is Q, the head loss is h2. If D1=2D2 and h2=10m. find the value of h1. Neglect minor losses. Friction factor is the same for all pipes. 15 marks

4. (a) A T section of mild steel has the following dimensions:
Total depth=9 cm, Breadth of flange=8 cm, Thickness of flange, and web= 1 cm. Calculate the plastic moment of the section if yield stress is 2500 kg/cm220 marks
(b) If stream function for steady flow is given by Ψ. (y2x2). determine whether the flow is rotational or irrotational. Also, Determine the velocity potential. 10 marks

### Part-II

5. (a) Explain the concept of a two-stage digestion system and why it is required. Describe the salient features of this type of sludge digestion. 15 marks
(b) A watercourse commands an area of 800 hectares. The intensity of irrigation of rice in this area is 50%. Transplantation of rice crop takes 15 days during which period the water depth required is 60 cm. Rainfall during this period is 15 cm. Find out:
(i) Duty of water for transplantation period.
(ii) Duty at the head of the distributary, taking 20% loss in watercourses.
(iii) Discharge required in watercourses. 15 marks

6. (a) Explain the difference between a milestone chart and a bar chart. How can a milestone chart be developed into a network? 10 marks
(b) Three activities to be implemented in parallel have the following time-cost relationship:

What will be the feasible range of total direct cost for the three activities together? 20 marks

7. (a) Briefly describe the characteristics of a good brick. List any three types of defects in bricks and indicate the cause of these defects. Explain why 'frog' is provided in bricks. What are modular bricks? 15 marks
(b) List the possible types of errors in chain surveying. How are these errors estimated? 15 marks