A. Dislocation climb
B. Cross-slip
C. Twinning
D. Recrystallisation
Related Mcqs:
- The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is_________________?
A. 130
B. 180
C. 230
D. 250 - Diffusion co-efficient of a metal in a solid solution depends upon its ?
A. Composition
B. Temperature
C. Both A. & B.
D. Neither A. nor B. - Which of the following phenomenon will exhibit the minimum heat transfer ?
A. Boiling
B. Forced convection in air
C. Free convection in air
D. Conduction in air - The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element ?
A. Silicon
B. Carbon
C. Phosphorous
D. Chromium - The phenomenon occurring during explosion of a hydrogen bomb is___________________?
A. Nuclear fission
B. Nuclear fusion
C. A combination of both nuclear fission & fusion
D. None of these - Solute atoms which cause yield point phenomenon in mild steel are/is_________________?
A. Aluminium
B. Boron
C. Carbon
D. Nitrogen - Difference at any instant between the value of the controlled variable and the set point is called the__________________?
A. Deviation
B. Derivative time
C. Error ratio
D. Differential gap - Which of the following is not an ore of copper ?
A. Cryolite
B. Azurite
C. Chalcopyrite
D. Malachite - Which of the following forces does not act on a fluid at rest ?
A. Viscous force
B. Gravity force
C. Hydrostatic force
D. Surface tension force - Out of the following the refractive index is the highest for____________________?
A. Glass
B. Diamond
C. Brine
D. Kerosene
