Engineering :: Strength of Materials

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11.

The unit of modulus of elasticity is same as those of

A.	stress, strain and pressure	B.	stress, force and modulus of rigidity
C.	strain, force and pressure	D.	stress, pressure and modulus of rigidity

12.

When a change in length takes place, the strain is known as

A.	linear strain	B.	lateral strain
C.	volumetric strain	D.	shear strain

13.

The modulus of elasticity for mild steel is approximately equal to

A.	10 kN/mm2	B.	80 kN/mm2
C.	100 kN/mm2	D.	210 kN/mm2

14.

Young's modulus may be defined as the ratio of

A.	linear stress to lateral strain	B.	lateral strain to linear strain
C.	linear stress to linear strain	D.	shear stress to shear strain

15.

Modulus of rigidity may be defined as the ratio of

A.	linear stress to lateral strain	B.	lateral strain to linear strain
C.	linear stress to linear strain	D.	shear stress to shear strain

16.

The unit of Young's modulus is same as that of stress.

True

False

17.

Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 2 : 5, then the ratio of modulus of elasticity of the two materials will be

A.	2 ; 5	B.	5 ; 2
C.	4 ; 3	D.	3 ; 4

18.

The deformation of a bar under its own weight is

A.	equal to	B.	half
C.	double	D.	quadruple

19.

The elongation of a conical bar under its own weight is

A.	equal to	B.	half
C.	one-third	D.	two-third

20.

Strain rosetters are used tc

A.	measure shear strain	B.	measure linear strain
C.	measure volumetric strain	D.	relieve strain