A. Motion of dislocations
B. Stretching of atomic bonds
C. Breakage of atomic bonds
D. None of the above
Related Mcqs:
- 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 - ______________ 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 - 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 - 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 - 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) - 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 - Strain hardening effect in metals subjected to cold working is due to the _______________ mechanism?
A. Slip
B. Fracture
C. Winning
D. Dislocation - Strain hardening effect in a metal subjected to cold working is due to the ______________ mechanism?
A. Fracture
B. Dislocation
C. Slip
D. Twinning - 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 - 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
