Q.1
What is an expression of true stress?
  • a) Pu / Ai
  • b) Pu / A0
  • c) P / Ai
  • d) P / A0
Q.2
True strain is ____ than the engineering strain corresponding to a given load.
  • a) Larger
  • b) Smaller
  • c) Equal
  • d) Either smaller or equal
Q.3
What is a relation between true and engineering strain?
  • a) ƐT = ln (1 + Ɛ)
  • b) ƐT = ln (L/L0)
  • c) ƐT = ln (ΔL/L0)
  • d) ƐT = ΔL/L0
Q.4
What is the relation between true and engineering stress?
  • a) σT = ln (L/L0)
  • b) σT = ln (1 + Ɛ)
  • c) σT = σ (1 + Ɛ)
  • d) σT = σ (1 – Ɛ)
Q.5
What term defines plastic instability?
  • a) dP = constant
  • b) dP = 0
  • c) dP < 0
  • d) dP > 0
Q.6
Plastic instability occurs when the slope of the true stress strain curve ____ the true stress at the point.
  • a) Exceeds
  • b) Equals
  • c) Is less
  • d) Is less or higher
Q.7
True value of stress experience by material _____ than the conventional one for a given load.
  • a) Higher
  • b) Lower
  • c) Equal
  • d) Higher or lower
Q.8
What is considered more in mechanical working processes?
  • a) Yield stress
  • b) Shear stress
  • c) True stress
  • d) Engineering stress
Q.9
True stress strain curve _______
  • a) Continuously rises
  • b) After yield point comes down
  • c) After yield point remains constant
  • d) Uncertain after yield point
Q.10
The points on the true stress strain curve ______ the conventional stress strain curves up to the onset of necking.
  • a) Lie on the left of
  • b) Lie on the right of
  • c) Superimpose
  • d) May lie on left or right
Q.11
Materials in general have higher elastic strain oforder.
  • a) True
  • b) False
Q.12
True stress value is affected by strain hardening.
  • a) True
  • b) False
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