Q.1
The rate of recrystallization can be enhanced by ______
  • a) increasing the temperature
  • b) increasing the percentage of cold work
  • c) increasing the rate of cooling
  • d) applying pressure
Q.2
The critical degree of cold work lies between _____ of cold work.
  • a) 2% and 20%
  • b) 5% and 10%
  • c) 7% and 15%
  • d) 20% and 30%
Q.3
The recrystallization in pure metal is faster than in _____
  • a) non-metals
  • b) alloys
  • c) polymers
  • d) d-block metals
Q.4
For pure metals, the recrystallization temperature is normally _____
  • a) equal to Tm
  • b) 0.5 Tm
  • c) 0.8 Tm
  • d) 0.3 Tm
Q.5
In hot working, plastic deformation operations are often carried out at temperatures above the ______ temperature.
  • a) melting
  • b) recrystallization
  • c) room
  • d) cold working
Q.6
Which of the following metals has recrystallization temperature below 0⁰C?
  • a) Pb
  • b) Zn
  • c) Al
  • d) Cu
Q.7
Which of the following metals has recrystallization temperature above 1000⁰C?
  • a) Cu- Zn alloy
  • b) Ni
  • c) Fe
  • d) W
Q.8
Cold working increases ______ of the metal.
  • a) hardness
  • b) ductility
  • c) melting point
  • d) conductivity
Q.9
Yield strength is the stress corresponding to point of intersection of stress-strain curve and strain offset line.
  • a) True
  • b) False
Q.10
The stress level at which plastic deformation begins is known as the proportional limit point.
  • a) True
  • b) False
0 h : 0 m : 1 s