Visvesvaraya Technological University (VTU) 2006 B.E FIRST SEMESTER , ELEMENTS OF CIVIL ENGINEERING - Question Paper

FIRST SEMESTER B.E. DEGREE EXAMINATION, JANUARY 2006
COMMON TO ALL BRANCHES
ELEMENTS OF CIVIL ENGINEERING
Time: three hrs. Max. Marks:100
Note: ans any 5 questions,
1. (a) What is meant scheduling of a project? discuss its importance.
(b) discuss the importance uses of stones. (7 marks)
(c) elaborate the important properties of good bricks? discuss (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 Ferro cement? discuss the properties and uses of Ferro cement. (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 300 N and 500 N. 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
figures five (b). Locate its x intercept from point O. (8 marks)
(c) A ladder weighing 200N is to be kept in a position as shown in fit. 5(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 700 N is at a height
2m above the floor level. (8 marks)
6. (a) Determine the centroid o a semi circle of radius R from 1st principle. (8 marks)
(b) Locate the centriod of the shaded area shown in fig six (b) with respect to the axes
shown. (12 marks)
7. (a) From the 1st principle, determine the moment of inertia of a triangle of base
width ‘b’ and height ‘h’ about its base. (8 marks)
(b) The strength of a 600mm deep and 250mm wide I beam of uniform thickness
10mm is increased by wielding a 350mm wide and 20mm thick plate to its upper
flange as shown in figure seven (b). Determine the increase in moment of inertia of
the part abut 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° with the floor. The weight of ladder is 900N. The ladder
is at the verge of slipping when a man weighing 750N stands 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.

Earning:   Approval pending.