SM 2

The elongation of a conical bar under its own weight is.......... that of prismatic bar of the same length.

• equal to

• half

• one-third

• two-third

The length of a conical bar is 1, diameter of base is d and weight per unit volume is w. It is fixed at its upper end and hanging freely. The elongation of the bar under the action of its own weight will be

Strain rosetters are used to

• measure shear strain

• measure linear strain

• measure volumetric strain

• relieve strain

A bar of length L meters extends by l mm under a tensile force of P. The strain produced in the bar is

The extension of a circular bar tapering uniformly from diameter d1 at one end to diameter d2 at the other end, and subjected to an axial pull of P is given by Strength of Materials

The extension of a circular bar tapering uniformly from diameter d, at one end to diameter d₂ at the other end, and subjected to an axial pull of P is. the extension of a circular bar of diameter √d1d₂ subjected to the same load P.

• equal to

• less than

• greater than

• none of the above

The ultimate tensile stress for mild steel is.............the ultimate compressive stress.

• equal to

• less than

• more than

The maximum stress produced in a bar of tapering section is at

• smaller end

• larger end

• middle

• any where

Modular ratio of the two materials is the ratio of

• linear stress to linear strain

• shear stress to shear strain

• their modulus elasticities

• ) their modulus rigidities

The shear modulus of most materials with respect to the modulus of elasticity is

• equal to half

• less than half

• more than half

• none of the above