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C192011 Pages:3

100°C. The Young’s modulus for steel and brass are respectively 200 kN/mm?
and 100 kN/m’. The coefficient of thermal expansion values for steel and brass

are respectively 11.6 x 10% °C and 18.7 x 100 °C,

Derive the torsion formula with assumptions. (8)
Define the term torsional rigidity. (2)
PART ‏تا‎
‎Answer any three full questions, each carries 10marks
Distinguish between roller and hinged support. (2)

A simply supported beam has a span of 9 m and carries a uniformly distributed (8)
load of 20 KN/m over the whole span along with two, point loads of 30 KN and

40 KN at 6 m and 7.5 m respectively from the left-hand support. Draw the shear

force and bending moment diagrams indicating values at the point loads.

A 14-m simply supported beam with an overhang at the right end is loaded ೩5 (10)
shown in Fig. It carries a load of 10 KN applied through a bracket and also a
uniformly distributed load for 8 m length from the right end. Draw the shear

force and bending moment diagram. Also find point of contra flexure.
10 kN
‏وہ‎ Dees kN/m
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A E

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3-2 |-<€2> | 1|<—4—>|<—4—>|

Discuss the significance of flexural rigidity in the design of beams. (3)
A simply supported 150 mm wide, 300 mm deep and 4 m long beam carriesa (7)
uniformly distributed load of 15 kN /m throughout the span. Determine the
maximum bending stress and also determine the bending stress at the point

which is 50 mm below the top surface and 1.2 m from the left support.

At critical section of a I beam, the value of shear force is 45 kN and the (10)
sectional dimensions are: flange width 200 mm, flange thickness 30 mm, web
thickness 30 mm and the total depth is 300 mm. Draw the shear stress

distribution across the depth of the section.

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