Related Mcqs:

1. A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson’s ratio of the rod is___________________?

   A. 0
   B. 0.33
   C. 0.44
   D. 0.25

2. ______________ 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

3. 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

4. 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

5. 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)

6. The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?

   A. 2300 J
   B. 4600 J
   C. 230 J
   D. 2.3 × 106 J

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. 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

10. For dynamic strain measurement, the Wheatstone bridge used is of ______________ type ?

    A. Voltage sensitive null
    B. Voltage sensitive deflected
    C. Current sensitive deflected
    D. None of these