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Chapter-9: Mechanical Properties of Solids

1. Poisson’s Ratio is applicable to –

  • Solid only
  • Gas only
  • Liquid only
  • All of these
Answer
Solid only

2. The restoring force per unit area is known as-

  • strain
  • elasticity
  • stress
  • None of these
Answer
stress

3. The ratio of stress to strain is called-

  • Frictional coefficient
  • Elastic constant
  • Coefficient of viscosity
  • Surface tension
Answer
Elastic constant

4. Unit of Stress is

  • Nm⁻¹
  • Nm
  • Nm⁻²
  • Nm⁻³
Answer
Nm⁻²

5. The dimensional formula of stress is-

  • [ML⁻¹T⁻²]
  • [M°L°T°]
  • [MLT⁻¹]
  • [MLT⁻²]
Answer
[ML⁻¹T⁻²]

6. According to Hooke’s Law of Elasticity, if stress is increased, the ratio of stress to strain-

  • decreases
  • becomes zero
  • increases
  • remains constant
Answer
remains constant

7. Substances which can be stretched to cause large strain are called-

  • Isomers
  • Elastomers
  • Plastomers
  • Polymers
Answer
Elastomers

8. The ratio of stress and strain is called-

  • surface tension
  • modulus of elasticity
  • coefficient of friction
  • coefficient of viscosity
Answer
modulus of elasticity

9. The ratio of tensile and longitudinal strain is called–

  • young’s modulus
  • modulus of elasticity
  • bulk modulus
  • None of these
Answer
young’s modulus

10. The ratio of shearing stress to the shearing strain is defined as-

  • Young’s Modulus
  • Bulk Modulus
  • Shear Modulus
  • Compressibility
Answer
Shear Modulus

11. The Shear modulus is also known as-

  • Bulk Modulus
  • Young’s Modulus
  • Modulus of Rigidity
  • Poisson’s Ratio
Answer
Modulus of Rigidity

12. Stress is a …. quantity.

  • vector
  • dimensionless
  • scalar
  • tensor
Answer
tensor

13. The internal restoring force per unit area is called-

  • tensile stress
  • hydraulic stress
  • None of these
  • shearing stress
Answer
hydraulic stress

14. The reciprocal of the bulk modulus is called-

  • compressibility
  • bulk modulus
  • young’s modulus
  • None of these
Answer
compressibility

15. The unit of modulus of the coefficient is-

  • N/m
  • N/m²
  • Nm²
  • None of these
Answer
N/m²

16. Which of the following is more elastic?

  • Glass
  • Sponge
  • Steel
  • Rubber
Answer
Steel

17. Out of the following, which is the most plastic material?

  • Rubber
  • Iron
  • Wood
  • Plasticine
Answer
Plasticine

18. Solids which break above the elastic limit are called

  • Ductile
  • Elastic
  • Brittle
  • Malleable
Answer
Brittle