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 Young's modulus is defined a

• Tensile strain/Tesnsile stress

• Tensile stress*Tensile strain

• Tensile stress/Tensile strain

• Length/area

With rise in temperature, the Young’s modulus of elasticity of a material

• Increases

• May increase or decrease

• Does not change

• Decreases

The limit beyond which the material does not behave elastically is known as

• Proportional limit

• Plastic limit

• Elastic limit

• Yield Point

The section modulus of a rectangular section(b*d) about an axis through its C.G. and parallel to the base ‘b’ is

• bd³/3

• bd³/4

• bd³/6

• bd³/12

Due to the forces acting, a horizontal beam is in:

• Shear

• Compression

• Tension

• None

The unit of Young’s modulus of elasticity is:

• pascals

• metres

• dimension-less

• newtons

A wire is stretched 3 mm by a force of 150 N. Assuming the elastic limit is not exceeded, the force that will stretch the wire 5 mm is:

• 150 N

• 90 N

• 250 N

• 450 N

Due to forces acting, a pillar supporting a bridge is in:

• compression

• shear

• tension

• none

The spring balance does not read properly after its long use, because

• The elasticity of spring increases

• The elasticity decreases

• Its plastic power decreases

• Its plastic power increases

When compared with solids and liquids, the gases have

• Minimum volume elasticity

• Maximum volume elasticity

• Maximum Young's modulus

• Maximum modulus of rigidity