The effective flange area in tension of a plate girder is equal to (where A_f is the area of each flange and A_w, is the web area).

Given that for a channel section, the width of flange = b, the depth of the web between centres of flanges = h, the thickness of flange = t(, the moment of interia of the channel about the axis of bending = I, the distance 'e' of the shear centre outside the channel section from the mid-thickness of the web is:

A
circular shaft subjected to torsion undergoes a twist of `1^circ` in a length
of 120 cm. If the maximum shear stress induced is limited to 1000 kg/cm² and if modulus of rigidity G = 0.8 x 10⁶ kg/cm², then the radius of the shaft should be

If a 30 m length
can be taped with a precision of `pm` 0.01 m, then the standard error of
measuring 1.08 km with the same precision will be

A round bar made
of same material consists of 3 parts each of 100 mm length having
diameters of 40 mm, 50 mm and 60 mm respectively. If the bar is
subjected to an axial load of 10 kN, the total elongation of the bar
would be (E is the modulus of elasticity in kN/mm²)

The kinetic energy in Nm of a circular disc of 20 m diameter and 10 cm thick, of material weighing 100 kg/m³, rotating above an axis through its centre at right angles to its place and making 2000 rpm is

A shaft turns at 150 rpm under a torque of 1500 Nm. Power transmitted is