Theory of Structures
A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm², the tensile force developed at a temperature of 50°C, is

80 N/mm²
120 N/mm²
150 N/mm²
100 N/mm 2

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Theory of Structures
The horizontal thrust on the ends of a two hinged semicircular arch of radius ‘R’ carrying

A uniformly distributed load ? per unit run over its entire span is 4/3 ?R/?
A uniformly distributed load ? per unit run over its right half span, is ? ?R/?
A distributed load varying from zero at the left end to ? per unit horizontal run at the right end, is ? ?R/?
All of these

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