Modulus of rigidity is defined as the ratio of_________________?

Related Mcqs:

1. Poisson’s ratio is defined as the ratio of_________________?

   A. longitudinal stress and longitudinal strain
   B. longitudinal stress and lateral stress
   C. lateral stress and longitudinal stress
   D. lateral stress and lateral strain
   E. none of the above

2. Young’s modulus is defined as the ratio of ___________________?

   A. volumetric stress and volumetric strain
   B. lateral stress and lateral strain
   C. longitudinal stress and longitudinal strain
   D. shear stress to shear strain
   E. longitudinal stress and lateral strain

3. The Young’s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length________________?

   A. half
   B. same amount
   C. double
   D. one-fourth
   E. four times

4. The torsional rigidity of a shaft is expressed by the_______________?

   A. maximum torque it can transmit
   B. number of cycles it undergoes before failure
   C. elastic limit up to which it resists torsion, shear and bending stresses
   D. torque required to produce a twist of one radian per unit length of shaft
   E. maximum power it can transmit at highest possible-speed

5. Strain is defined as the ratio of__________________?

   A. change in volume to original volume
   B. change in length to original length
   C. change in cross-sectional area to original cross-sectional area
   D. any one of the above
   E. none of the above

6. The value of modulus of elasticity for mild steel is of the order of________________?

   A. 2.1xl05 kg/cm2
   B. 2.1 X 106 kg/cm2
   C. 2.1 x 107 kg/cm2
   D. 0.1 xlO6 kg/cm2 (<?) 3.8 x 106 kg/cm2

7. If the radius of wire stretched by a load is doubled, then its Young’s modulus will be_______________?

   A. doubled
   B. halved
   C. become four times
   D. become one-fourth
   E. remain unaffected

8. The unit of Young’s modulus is__________________?

   A. mm/mm
   B. kg/cm
   C. kg
   D. kg/cm2
   E. kg cm2

9. The percentage reduction in area of a cast iron specimen during tensile test would be of the order of_________________?

   A. more than 50%
   B. 25—50%
   C. 10—25%
   D. 5—10%
   E. negligible

10. The ratio of lateral strain to the linear strain within elastic limit is known as_______________?

    A. Young’s modulus
    B. bulk modulus
    C. modulus of rigidity
    D. modulus of elasticity
    E. Poisson’s ratio