SM 2

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

• two-third

• one-third

• equal to

• half

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 volumetric strain

• measure shear strain

• measure linear 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 d1 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

• greater than

• less 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

• anywhere

• larger end

• middle

• smaller end

Modular ratio of the two materials is the ratio of

• their modulus elasticities

• linear stress to linear strain

• their modulus rigidities

• shear stress to shear strain

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

• equal to half

• none of the above

• less than half

• more than half