# Strain Constants MCQ Questions & Answers

Strain Constants MCQs : This section focuses on the "Strain Constants". These Multiple Choice Questions (MCQs) should be practiced to improve the Strain Constants skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

A bar of 40mm dia and 40cm length is subjected to an axial load of 100 kN. It elongates by 0.005mm. Calculate the Poissons ratio of the material of bar?

A. 0.25
B. 0.28
C. 0.3
D. 0.33

Question 2

A circular rod of dia 30 mm and length 200mm is extended to 0.09mm length and 0.0045 diameters through a tensile force. What will be its Poissons ratio?

A. 0.3
B. 0.31
C. 0.32
D. 0.33

Question 3

A solid metal bat of uniform diameter D and length L is hung vertically from a ceiling. If the density of the material of the bar is 1 and the modulus of elasticity is E, then the total elongation of the bar due to its own weight will be ____________

A. L/2E
B. L2/2E
C. E/2L
D. E/2L2

Question 4

An experiment was done and it was found that the bulk modulus of a material is equal to its shear modulus. Then what will be its Poissons ratio?

A. 0.125
B. 0.15
C. 0.2
D. 0.375

Question 5

Determine the Poissons ratio and bulk modulus of a material, for which Youngs modulus is 1.2 and modulus of rigidity is 4.8.

A. 7
B. 8
C. 9
D. 10

Question 6

For a material, Youngs modulus is given as 1.2 x 105 and Poissons ratio 1/4. Calculate the bulk modulus.

A. 0.7 x 105
B. 0.8 x 105
C. 1.2 x 105
D. 1.2 x 105

Question 7

How many elastic constants does an isotropic, homogeneous and linearly elastic material have?

A. 1
B. 2
C. 3
D. 4

Question 8

How the elastic constants E and K are related?

A. E = 2K(1 - 2Î¼)
B. E = 3K(1 - 2Î¼)
C. E = 2K(1 - Î¼)
D. E = K(1 - 2Î¼)

Question 9

The modulus of rigidity and the modulus of elasticity of a material are 80 GPa and 200 GPa. What will be the Poissons ratio of the material?

A. 0.25
B. 0.3
C. 0.4
D. 0.5

Question 10

The Poissons ratio of a material is 0.3. what will be the ratio of Youngs modulus to bulk modulus?

A. 1.4
B. 1.2
C. 0.8
D. 0.6

Question 11

The Youngs modulus of elasticity of a material is 2.5 times its modulus of rigidity. Then what will be its Poissons ratio?

A. 0.25
B. 0.33
C. 0.5
D. 0.6

Question 12

What is the bulk modulus of elasticity?

A. The ratio of shear stress to shear strain
B. The ratio of direct stress to direct strain
C. The ratio of volumetric stress to volumetric strain
D. The ratio of direct stress to volumetric strain

Question 13

What will be the approximate value of shear modulus of a material if the modulus of elasticity is 189.8 GN/m2 and its Poissons ratio is 0.30?

A. 73 GN/m2
B. 80 GN/m2
C. 93.3 GN/m2
D. 103.9 GN/m2

Question 14

What will be the elastic modulus of a material if the Poisson's ratio for that material is 0.5?

A. Equal to its shear modulus
B. Three times its shear modulus
C. Four times its shear modulus
D. Not determinable

Question 15

What will be the ratio of Youngs modulus to the modulus of rigidity of a material having Poissons ratio 0.25?

A. 3.75
B. 3
C. 1.5
D. 2.5

Question 16

Which of the following is true if the value of Poisson's ratio is zero?

A. The material is rigid
B. The material is perfectly plastic
C. The longitudinal strain in the material is infinite
D. There is no longitudinal strain in the material

Question 17

How the elastic constants E and K are related?

A. E = 2K(1 – 2μ)
B. E = 3K(1 – 2μ)
C. E = 2K(1 – μ)
D. E = K(1 – 2μ)

Question 18

What will be the elastic modulus of a material if the Poisson’s ratio for that material is 0.5?

A. Equal to its shear modulus
B. Three times its shear modulus
C. Four times its shear modulus
D. Not determinable