IFS-Civil-Engineering-2013-Part-1.pdf - ~ Indian Foresl...

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~--------------------------------------------------------- Indian Foresl Service Examinatio~ ·20 13 I A-JGPT-M-DJFO-A I I Time Allowed : Three Hours I CIVIL ENGINEERING Paper-1 QUESTION PAPER SPECIFIC INSTRUCTIONS Maximum Marks : 200 I Please read each of the following instructions carefully before attempting questions. There are EIGHT questions in all, out of which FIVE are to be attempted. Question no. 1 and 5 are compulsory. Out of the remaining SIX questi.Q_ns, THREE are to be attempted selecting at least ONE question from each of the two Sections A and B. Attempts of questions shall be counted in chronological order. Unless struck off, attempt of a question shall be counted even if attempted partly. Any page or portion of the page left blank in the answer book must be clearly struck off. All questions carry equal marks. The number of marks carried by a question I part is indicated against it. Answers must be written in ENGLISH only. Unless other-wise mentioned, symbols and notations have their usual standard meanings. Assume suitable data, if necessary and indicate the same clearly. Neat sketches may be drawn, wherever required. SECTION-A Q. l(a) Compute the bending moment and torsional moment diagram of the cantilever circular bow girder in the shape of quadrant of a circle of radius 2 m and carrying concentrated load (normal to plane of the structure) of 20 kN at the free end. 8 Q. l(b) Write down the stiffness matrix of a truss member in a plane truss in member oriented axis. What will be its form for structure oriented coordinate axis ? Take L = Length of the member, A= Area of cross-section, E = Young's modulus, a = angle between member axis and structure oriented axis. 8 Q. I( c) Find the time period of oscillations for a block of mass 'm' hangs as shown in Fig. I and 2. 4+4 i
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Q. I (d) On a soft glacial clay layer 2 m thick with 45% liquid limit, the pressure intensity was increased from 400 kPa to 800 kPa. If the original void ratio was 0.67, calculate the settlement due to this pressure increment. 8 Q. !(e) Determine the thickness of boundary layer at the trailing edge of smooth plate of 5.0 m length and 2.0 m width. The plate is moving with a velocity of 5.0 m/sec in a stationary air. The kinematic viscosity of air is 1.5 x I o- 5 m 2 /s. Also determine drag force on oqe side of a plate if density of air is 0.125 slug/m 3 4+4 Q.
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  • Summer '16
  • Truss, Compressive stress

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