Quiz 2 - Stress and Strain

The deformation per unit length is called

• Strain

• Stress

• Elasticity

• None of these

The ability of the material to deform without breaking is called

• Elasticity

• Plasticity

• Creep

• Fracture

Which of the following material is more elastic?

• Rubber

• Wood

• Steel

• Glass

The percentage elongation and the percentage reduction in area depends upon

• Tensile strength of the material

• Ductility of the material

• Toughness of the material

• None of these

A load of 1 kN acts on a bar having cross-sectional area 0.8 cm2 and length 10 cm. The stress developed in the bar is

• 12.5 N/mm2

• 25 N/mm2

• 50 N/mm2

• 75 N/mm2

A steel bar 100 mm long is subjected to a tensile load .If the change in length of the bar is 1/20 mm, what will be the value of tensile stress if E=2x10^5 N/mm2

• 25 N/mm2

• 50 N/mm2

• 75 N/mm2

• 100 N/mm2

The stress at which extension of a material takes place more quickly as compared to increase in load, is called

• Elastic point

• Plastic point

• Breaking point

• Yield point

Every material obeys the Hooke’s law within

• Elastic limit

• Plastic limit

• Proportionality limit

• None of these

The ratio of lateral strain to linear strain is called

• Poisson ratio

• Youngs modulus

• Rigidity modulus

• Bulk modulus

Which of the following is a dimensionless quantity?

• Both of these

• Strain

• Poisson ratio

• None of these