CHAPTER-9: MECHANICAL PROPERTIES OF SOLIDS

Class 11

 

1. Poisson’s Ratio is applicable to-

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

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

  • strain
  • elasticity
  • stress
  • None of these

3. The ratio of stress to strain is called-

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

View Answer

Elastic constant

4. Unit of Stress is

  • Nm⁻¹
  • Nm
  • Nm⁻²
  • Nm⁻³

5. The dimensional formula of stress is-

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

View 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

View Answer

remains constant

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

  • Isomers
  • Elastomers
  • Plastomers
  • Polymers

8. The ratio of stress and strain is called-

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

View 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

View Answer

young’s modulus

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

View Answer

Shear Modulus

11. The Shear modulus is also known as-

View Answer

Modulus of Rigidity

12. Stress is a …. quantity.

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

View Answer

hydraulic stress

14. The reciprocal of the bulk modulus is called-

View Answer

compressibility

15. The unit of modulus of the coefficient is-

16. Which of the following is more elastic?

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

18. Solids which break above the elastic limit are called

 

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