Related Mcqs:

1. A metal having a Poisson’s ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is________________?

   A. -0.8
   B. 0.8
   C. +0.08
   D. -0.24

2. Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young’s modulus, G = Modulus of rigidity or shear modulus v = Poisson’s ratio) ?

   A. E = 2G (1 + v)
   B. E = G (1 + v)
   C. E = G (1 + v)/2
   D. E = 2G (1 + 2v)

3. ______________ circuit is most commonly used to measure strain with the help of a strain gauge?

   A. Ballast
   B. Voltage balancing potentiometric
   C. Simple current sensitive
   D. None of these

4. The elastic strain in copper is due to the__________________?

   A. Motion of dislocations
   B. Stretching of atomic bonds
   C. Breakage of atomic bonds
   D. None of the above

5. A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ?

   A. Steel
   B. Glass
   C. Rubber
   D. Brass

6. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of__________________?

   A. 1 : 1
   B. 1 : 2
   C. 2 : 1
   D. 1 : 4

7. Strain hardening effect in metals subjected to cold working is due to the _______________ mechanism?

   A. Slip
   B. Fracture
   C. Winning
   D. Dislocation

8. Strain hardening effect in a metal subjected to cold working is due to the ______________ mechanism?

   A. Fracture
   B. Dislocation
   C. Slip
   D. Twinning

9. Change in volume of metals from absolute zero temperature to their melting points is___________________?

   A. Almost same for all metals
   B. Different for different metals
   C. Less for low melting point metals
   D. Less for high melting point metals

10. ‘Dikes’ are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel) ?

    A. V
    B. V/2
    C. 2V
    D. 3V