The elastic stress strain behaviour of rubber is_____________________?

Related Mcqs:

1. The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________?

   A. decrease
   B. increase
   C. remain constant
   D. first increase and then decrease
   E. first decrease and then increase

2. Ratio of inertia force to elastic force is known as__________________?

   A. Mach number
   B. Froude number
   C. Reynold’s number
   D. Weber’s number
   E. none of the above

3. The behaviour of coal in a furnace is determained by_______________________?

   A. the content of sulphur
   B. the content of ash and heating value
   C. the proximate analysis
   D. the exact analysis
   E. its type

4. The upper surface of a weir over which water flows is known is_____________________?

   A. crest
   B. nappe
   C. sill
   D. weir top
   E. contracta

5. The maximum discharge through a chimney occurs when the height of chimney is_____________________?

   A. infinitely long
   B. around 200 meters
   C. equal to the height of the hot gas column producing draught
   D. outside temperature is very low
   E. more than the tallest building nearby

6. Stress relaxation is- the phenomenon ___________________?

   A. in which parts are not loaded
   B. in which stress remains constant on in-creasing load
   C. in which deformation tends to loosen the joint and produces a stress reduced
   D. stress reduces on increasing load
   E. none of the above

7. Slow plastic defomiation of metals under a constant stress is known as________________?

   A. creep
   B. fatigue
   C. endurance
   D. plastic deformation
   E. non-plastic deformation

8. At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_________________?

   A. minimum
   B. maximum
   C. zero
   D. negative value
   E. could be any value

9. The normal stress in a fluid will be constant in all directions at a point only if__________________________?

   A. it is incompressible
   B. it has uniform viscosity
   C. it has zero viscosity
   D. it is frictionless
   E. it is at rest

10. The property of a fluid which enables it to resist tensile stress is known as___________________?

    A. compressibility
    B. surface tension
    C. cohesion
    D. adhesion
    E. viscosity