Bangalore University 2006-2nd Sem B.E Civil Engineering First/ester , - Question Paper

First/Second Semester B.E. Degree Examination, January 2006
CIV 13/23 Elements of Civil Engineering

Time: three hours Maximum Marks: 100

Note: ans any 5 ques..

1. a) What is meat by scheduling of a project? discuss its importance
(7 Marks)
b) discuss the important uses of stones (7 Marks)
c) elaborate the important properties of good bricks? Explain (6 Marks)

2. (a) List the uses of plain cement concrete (4 Marks)
b) discuss any 4 important properties of hardened concrete (8 Marks)
c) What is ferrocement? discuss the properties and uses of Ferrocement.
(8 Marks)

3. a) elaborate composite materials? discuss their applications. (6 Marks)
b) What is a total station? discuss its utility in surveying. (6 Marks)
c) What is remote sensing? discuss the applications of remote sensing. (8 Marks)

4. a) State and discuss “Principle of transmissibility” (2 Marks)
b) 3 forces acting on a hook are as shown in figure four (b). Determine the direction of the 4th force of magnitude 100N such that the hook is pulled in x direction only. Determine the outcome and force in x direction (8 Marks)

c) Figure four (c) indicates a system of cables in equilibrium condition under 2 vertical loads of 300N and 500N. Determine the forces developed in the various segments. (10 Marks)

5. a) discuss the term ‘couple moment’ and list its characters
(4 Marks)
b) Determine the resulting of the system of forces acting on a lamina as shown in figure (b). Locate is x intercept from point O. (8 Marks)

c) A ladder weighing 200N is to be kept in a position as shown in fig. five (c) resting on a smooth floor and leaning against a smooth wall. Determine the horizontal force needed to prevent it from slipping when a man weighing 700N is at a height 2m above the floor level. (8 marks)

6. a) determine the centroid of a semi circle of radium R from 1st principle. (8 Marks)
b) Locate the centroid of the shaded area shown in figure six (b) with respect to the axes shown. (12 Marks)

7. a) from the 1st [principle, determine the moment of inertia of a triangle for base width ‘b’ and height ‘h’ about its base. (8 Marks)

b) The strength of a 600mm deep and 20mm wide I – beam of uniform thickness 10mm is increased by welding a 350mm wide and 20mm thick plate to its upper flange as shown in figure seven 9b) Determine the increase in moment of inertia of the part about the base AB. (12 Marks)


8. a) discuss the terms static friction, limiting friction and dynamic friction. (6 Marks)
b) State the laws of dry friction. (7 Marks)

c) A ladder 5m long rests on a horizontal floor and leans against a smooth vertical wall at an angle of 70 Deg with the floor. The weight of ladder is 900N. The ladder is at the verge of slipping when a man weighing 750 N stand on it at a distance of 3.5m measured along the ladder from the top of ladder. Determine the coefficient of friction ranging from the ladder and the floor. (10 Marks)

Earning:   Approval pending.