Poisson’s ratio MCQ – Strength of Materials

21. If Poisson’s ratio of a material is 0.3, then the ratio of Young’s Modulus to bulk modulus is

  1. 1.4
  2. 1.2
  3. 0.8
  4. 0.6
Answer
Answer. b

22. When a body is elastically stretched, the value of Poisson’s ratio always remains

  1. greater than one
  2. less than one
  3. equal to one
  4. none of these
Answer
Answer. b

23. The bulk modulus of elasticity of a material is twice its modulus of rigidity. The Poisson’s ratio of the material is

  1. 2/7
  2. 1/7
  3. 4/7
  4. 3/7
Answer
Answer. a

24. For a material, the modulus of rigidity is 100 GPa and the modulus of elasticity is 250 GPa. The value of the Poisson’s ratio is

  1. 0.25
  2. 0.20
  3. 0.35
  4. 0.30
Answer
Answer. a

25. A bar specimen of 36 mm diameter is subjected to a pull of 90 kN during a tension test. The extension on a gauge length of 200 mm is measured to be 0.089 mm and the change in diameter to be 0.0046 mm. The Poisson’s ratio will be

  1. 0.287
  2. 0.265
  3. 0.253
  4. 0.241
Answer
Answer. a

26. For a given material the Poisson’s ratio is 0.25, the ratio of Young’s modulus and modulus of rigidity is

  1. 0.4
  2. 2.5
  3. 3.0
  4. 2.75
Answer
Answer. b

27. The maximum value of Poisson’s ratio for an elastic material is

  1. 0.5
  2. 0.25
  3. 1.0
  4. 0.75
Answer
Answer. a

28. In an experiment it is found that the bulk modulus of a material is equal to its shear modulus then the Poisson’s ratio is

  1. 0.125
  2. 0.250
  3. 0.375
  4. 0.500
Answer
Answer. a

29. The value of Poisson’s ratio of cork is approximately equal to

  1. 0.5
  2. 0.1
  3. 0
  4. 1
Answer
Answer. c

30. Poisson’s ratio of concrete is frequently taken as

  1. 0.5-0.75
  2. 0.15-0.25
  3. 0.05-0.15
  4. none of above
Answer
Answer. b
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