The stress developed in a material without any permanent set is called the____________________?

Related Mcqs:

1. The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the _______________ stress?

   A. Working
   B. Damaging
   C. Allowable
   D. None of these

2. The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is ______________ stress?

   A. Shear
   B. Tensile
   C. Compressive
   D. Thermal

3. Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is _____________ the longitudinal stress?

   A. Half
   B. Equal to
   C. Twice
   D. Eight times

4. In a thin cylindrical shell, the hoop stress is ________________ stress?

   A. Radial
   B. Circumferential tensile
   C. Compressive
   D. Longitudinal

5. In a cylindrical vessel subjected to internal pressure, the longitudinal stress ζL and the circumferential stress, ζn are related by___________________?

   A. ζh = 2 ζL
   B. ζh = ζL
   C. ζh = ζL/2
   D. No relation exists

6. Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, ζ = yield strength and E = modulus of elasticity) ?

   A. E
   B. ζ
   C. ζ/E
   D. E/ζ

7. A cylindrical pressure vessel of volume 6 πm3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to________________?

   A. 5 mm
   B. 6 mm
   C. 8 mm
   D. 10 mm

8. Stage efficiency for packed tower varies with the____________________?

   A. Type & size of packing
   B. Fluid rates and fluid properties
   C. Operating pressure and column diameter
   D. All A., B. and C.

9. Rivets are generally specified by the____________________?

   A. Head diameter
   B. Shank diameter
   C. Overall length
   D. None of these

10. Floating head heat exchangers are used for the____________________?

    A. Heat transfer between corrosive fluids
    B. Cases where temperature difference between the shell and the tubes is more (>50°C)
    C. Co-current heat transfer systems
    D. Counter-current heat transfer systems