SSC JE Mechanical Engineering 2011

A solid shaft of diameter D carries a twisting moment that develop maximum shear stress. If the shaft is replaced by a hollow one of OD = D and ID = $$\frac{3}{4}$$ D; then the maximum shear stress will be

With the increase of slenderness ratio, the compressive strength of the column is

A simply supported beam of length ‘L’ carries a concentrated load W at its center. If EI is the flexural rigidity of the beam, strain energy due to bending is

When a rectangular bar of length l, breadth b and thickness t is subjected to an axial pull of P, the linear train is given by (where E = modulus of elasticity)

A simply supported beam of span l carries a distributed load that varies linearly from zero at either of the ends, to w $$\frac{kg}{m}$$ at the mid-span. The shear force will be zero at

The variation of bending moment in a simply-supported beam carrying a uniformly distributed load is

During adiabatic process, essentially

The product of tangential force acting on a shaft and its radius is known as

Maximum shear stress obtained from Mohr’s circle is

An engine receives 278 $$\frac{kJ}{s}$$ of heat at a fixed temperature of $$283^\circ$$C and rejects heat at the rate of 208 $$\frac{kJ}{s}$$ to a sink maintained at $$5^\circ$$ C. The cycle on which the engine works may be classified as