1.
If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm² total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm² and Es is 15 Ec

2.
A close coil helical spring when subjected to a moment M having its axis along the axis of the helix

3.
In case of principal axes of a section

4.
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

5.
The ratio of lateral strain to axial strain of a homogeneous material, is known

6.
Flat spiral springs

7.
Maximum principal stress theory for the failure of a material at elastic point, is known

8.
Total strain energy theory for the failure of a material at elastic limit, is known

9.
Maximum shear stress theory for the failure of a material at the elastic limit, is known

10.
The moment of inertia of a triangular section (height h, base b) about its base, is

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