A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under_________________?

Related Mcqs:

1. 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

2. 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

3. In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is_________________?

   A. more
   B. less
   C. same
   D. more/less depending on composition
   E. may have any value

4. The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________?

   A. same
   B. more
   C. less
   D. more or less depending on other factors
   E. unpredictable

5. A beam is loaded as cantilever. If the load at the end is increased, the failure will occur ___________________?

   A. in the middle
   B. at the tip below the load
   C. at the support
   D. anywhere
   E. none of the above

6. Longitudinal stress in a thin cylinder is__________________?

   A. equal to the hoop stress
   B. twice the hoop stress
   C. half of the hoop stress
   D. one-fourth of hoop stress
   E. four times the hoop stress

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 ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to___________________?

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

9. In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called_____________?

   A. creeping
   B. yielding
   C. breaking
   D. plasticity
   E. none of the above

10. The value of Poisson’s ratio for steel is between_________________?

    A. 0.01 to 0.1
    B. 0.23 to 0.27
    C. 0.25 to 0.33
    D. 0.4 to 0.6
    E. 3 to 4