Please read each ofthe following instructiOIlS
carefully before attemptillg questiollS: Candidates should attempt FIVE questions ill all. Questioll No. 1 is compulsory. Out of the remaining FIVE questions attempt any FOUR.
All questiolls carry equal marks. The number
•
· of marks carried by a part of a question is
indicated against it.

Answers must be written in ENGLISH only.
Unless otherwise mentioned, symbols and notations have their usual standard meanings. Assume suitable data, ifnecessary and indicate
the same clearly.
Neat sketches may be drawn, wherever required.

All parts and sub-parts 01 a question are to be
attempted together in the answer book. AllY pages left blank in the answer book must be clearly struck out.
Use ofIS 456 2000, IS800: 2007alldsteeltable is allowed.
1


•
I. Enumerate the qualities of good bricks.
What are the various defects in timber?
What is the importance of water-cement ratio for making durable and high strength concrete?
Explain the role of super plasticizer as an admixture in concrete.
How fineness of cement is determined? What is its role in the strength of cement?


2. Due to architectural consideration the size of the simply supported beam is restricted to 250 mm x 400 mm. It carries a superimposed load 005 kN/m over a span of6m. Use limit state method to find out the requirement of the reinforcement in the beam. UseM25 concrete and Fe415 steel.
A pretensioned beam 250mm wide and 300 mm deep is prestressed by 12 wires each of 7mm diameter stressed to 1200 with their centroids located 100mm from the soffit. Estimate the final percentage loss of stress due to elastic deformation, creep, shrinkage and relaxation. Use following data:
Relaxation of steel stress 90 Es =210 kN/mm2, Ec 28 kN/mm2
Creep coefficient 1.6 Residual shrinkage strain x 10-4

3. In a roof truss,atiememberISA80rom x50rom x 8mm caries a tension load equal to the full strength of the member. The tie is connected to a gusset plate 8mm thick. Design the welded joint. Yield strength of steel is 250 MPa and shear stress in weld is 108 MPa.
The relevant properties of the angle sections are,

A=978MM2.CXX=27.3MM



Design a suitable built up section using two channels for a steel column to caRRY an axial load of 1200 kN. The effective length of column is 6.0 m. Properties of lSMC 350:
A 5366mm2 100.08 x I,=4.306 x 24.4 mm, width of flange=100 mm,
Permissible stress in axial compression of steel
260N/mm2.

<img src='./qimages/3399-3b.jpg'>

4. A project schedule has the following characteristics
Activity

<img src='./qimages/3399-4a.jpg'>

I. Draw the network diagram and mark critical path.
II. Find the expected time, standard deviation and
variance of each activity.
iii. What is the expected time of completion of the project?
IV. What is the probability of completion of the project in 34 weeks?
v. What is the probability of the activity3-7 being completed in the twentieth week?



List out the basic parts and operations of a Hoe and
state its applications 1
Differentiate between PERT and CPM of project
planing.

5. A rigid bar AB is hinged at A and supported by bronze rod GD of length 2L and steel rod FC of length L.A load P is applied at the end B as shown in Fig. I. Calculate the load carried by each rod and reaction at A. Take area of steel rod as 1.5 times the area of bronze rod, modulus of elasticity of steel as 2 times the modulus of elasticity of bronze.

<img src='./qimages/3399-5a.jpg'>

The load on a bolt consists of an axial pull ofl5 kN together with a transverse shear of 7.5 kN. Determine the diameter of the bolt according to
I. Maximum principal stress theory
II. Maximum shear stress theory
III. Maximum principal strain theory
IV, Maximum strain energy theory
v. Maximum shear strain energy theory


6. a) Analyse the beam loaded as shown in Fig. 2 using slope deflection method. Portion AB has a second moment of areas I.S1andBChasthisvalue as I. Draw the bending moment and shear force

<img src='./qimages/3399-6a.jpg'>

Determine the value of fully plastic moment Mp for the frame shown in Fig. 3.

<img src='./qimages/3399-6b.jpg'>