According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to _______________ times the yield stress ?

Related Mcqs:

1. The ratio of the shear stress to the principal stress on a principal plane is______________________?

   A. 0
   B. 1
   C. 1/2
   D. 1/3

2. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the________________?

   A. Fatigue strength
   B. Creep strength
   C. Resilience
   D. Endurance limit

3. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of _______________ steel bars?

   A. Hot rolled mild
   B. Cold rolled mild
   C. Forged
   D. Machinable stainless

4. _______________ test determines the yield strength, Young’s modulus of elasticity, percentage reduction in area & percentage elongation of a material ?

   A. Tensile
   B. Fatigue
   C. Impact
   D. None of these

5. The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the _____________ point of the material?

   A. Elastic
   B. Ultimate
   C. Yielding
   D. Breaking

6. In Newton’s law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?

   A. V2
   B. 1/V2
   C. 1/Vg
   D. Vg

7. A fluid is termed as the Newtonian fluid, when the shear stress is _________________ the velocity gradient ?

   A. Independent of
   B. Inversely proportional to
   C. Directly proportional to
   D. None of these

8. The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the_______________?

   A. Work hardening
   B. Bauschinger effect
   C. Creeping effect
   D. Stress recovery effect

9. A form of stress corrosion failure termed as ‘season cracking’ is generally observed in __________________?

   A. Thermosetting polymers
   B. High carbon steels
   C. Brasses
   D. Borosilicate glasses

10. 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)