A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be_________________?

Related Mcqs:

1. Shear stress induced in a shaft subjected to tension will be__________________?

   A. maximum at periphery and zero at center
   B. maximum at center
   C. uniform throughout
   D. average value in center
   E. none of the above

2. The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to___________________?

   A. Young’s modulus
   B. bulk modulus
   C. modulus of rigidity
   D. modulus of elasticity
   E. Poisson’s ratio

3. A key is subjected to side pressure as well at shearing forces. These pressures are called_________________?

   A. bearing stresses
   B. fatigue stresses
   C. crushing stresses
   D. resultant stresses
   E. none of the above

4. The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; this stress is called___________________?

   A. longitudinal stress
   B. hoop stress
   C. yeiled stress
   D. ultimate stress
   E. none of the above

5. In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is_________________?

   A. more
   B. less
   C. same
   D. more/less depending on composition
   E. may have any value

6. The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________?

   A. same
   B. more
   C. less
   D. more or less depending on other factors
   E. unpredictable

7. The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is_______________?

   A. same
   B. double
   C. half
   D. four times
   E. one-fourth

8. Resilience of a material is considered when it is subjected to_________________?

   A. frequent heat treatment
   B. fatigue
   C. creep
   D. shock loading
   E. resonant condition

9. In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the_________________?

   A. size of rivet
   B. size of the drilled or reamed hole
   C. average of size of rivet and hole
   D. smaller of the two
   E. any one of the above

10. Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in_________________?

    A. tension
    B. compression
    C. bearing
    D. any one of the above
    E. none of the above