Poisson’s ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson’s ratio for structural and pressure vessel steel may be taken as ____________________?

Related Mcqs:

1. 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

2. The ratio of lateral strain to linear strain is termed as the___________________?

   A. Poisson’s ratio
   B. Bulk modulus
   C. Modulus of elasticity
   D. Shear modulus

3. 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

4. ____________________ strain is measured using a ‘strain rosetter’ ?

   A. Volumetric
   B. Shear
   C. Linear
   D. None of these

5. For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylindrical vessel, what value of weld joint efficiency should be used ?

   A. 0.8
   B. 0.9
   C. 1.0
   D. (0.8)0.5

6. In case of a ‘thin’ pressure vessel, the ratio of its diameter to wall thickness is_________________?

   A. < 10
   B. > 10
   C. > 20
   D. 30

7. A pressure vessel is said to be made of ‘thick’ shell, if the ratio of its diameter to wall thickness is_______________?

   A. < 10
   B. > 10
   C. > 20
   D. < 20

8. The ratio of linear stress to linear strain is termed as the ____________________?

   A. Modulus of elasticity
   B. Modulus of rigidity
   C. Bulk modulus
   D. None of these

9. The ratio of shear stress to shear strain is called ____________________?

   A. Bulk modulus
   B. Shear modulus
   C. Modulus of rigidity
   D. Modulus of elasticity

10. Which of the following material is seldom used for pressure vessel construction ?

    A. Rimmed still
    B. Mild steel
    C. Killed steel
    D. Semi-killed steel