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MCQs

Total Questions : 90 | Page 5 of 9 pages
Question 41. 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?
  1.    0.30
  2.    0.31
  3.    0.32
  4.    0.33
 Discuss Question
Answer: Option D. -> 0.33
Answer: (d).0.33
Question 42. The Poissons ratio of a material is 0.3. what will be the ratio of Youngs modulus to bulk modulus?
  1.    1.4
  2.    1.2
  3.    0.8
  4.    0.6
 Discuss Question
Answer: Option B. -> 1.2
Answer: (b).1.2
Question 43. What is the bulk modulus of elasticity?
  1.    The ratio of shear stress to shear strain
  2.    The ratio of direct stress to direct strain
  3.    The ratio of volumetric stress to volumetric strain
  4.    The ratio of direct stress to volumetric strain
 Discuss Question
Answer: Option D. -> The ratio of direct stress to volumetric strain
Answer: (d).The ratio of direct stress to volumetric strain
Question 44. For a material, Youngs modulus is given as 1.2 x 10⁵ and Poissons ratio 1/4. Calculate the bulk modulus.
  1.    0.7 x 10⁵
  2.    0.8 x 10⁵
  3.    1.2 x 10⁵
  4.    1.2 x 10⁵
 Discuss Question
Answer: Option B. -> 0.8 x 10⁵
Answer: (b).0.8 x 10⁵
Question 45. Determine the Poissons ratio and bulk modulus of a material, for which Youngs modulus is 1.2 and modulus of rigidity is 4.8.
  1.    7
  2.    8
  3.    9
  4.    10
 Discuss Question
Answer: Option B. -> 8
Answer: (b).8
Question 46. What is the ratio of Youngs modulus E to shear modulus G in terms of Poissons ratio?
  1.    2(1 + μ)
  2.    2(1 – μ)
  3.    1/2 (1 – μ)
  4.    1/2 (1 + μ)
 Discuss Question
Answer: Option A. -> 2(1 + μ)
Answer: (a).2(1 + μ)
Question 47. The relationship between Youngs modulus E, bulk modulus K if the value of Poissons ratio is unity will be __________
  1.    E = -3K
  2.    K = -3E
  3.    E = 0
  4.    K = 0
 Discuss Question
Answer: Option A. -> E = -3K
Answer: (a).E = -3K
Question 48. E, G, K and μ elastic modulus, shear modulus, bulk modulus and Poisson’s ratio respectively. To express the stress strain relations completely for this material, at least __________
  1.    E, G and μ must be known
  2.    E, K and μ must be known
  3.    Any two of the four must be known
  4.    All the four must be known
 Discuss Question
Answer: Option C. -> Any two of the four must be known
Answer: (c).Any two of the four must be known
Question 49. Youngs modulus of elasticity and Poissons ratio of a material are 1.25 x 10² MPa and 0.34 respectively. The modulus of rigidity of the material is __________
  1.    0.9469 MPa
  2.    0.8375 MPa
  3.    0.4664 MPa
  4.    0.4025 MPa
 Discuss Question
Answer: Option C. -> 0.4664 MPa
Answer: (c).0.4664 MPa
Question 50. A rod of length L and diameter D is subjected to a tensile load P. Which of the following is sufficient to calculate the resulting change in diameter?
  1.    Youngs modulus
  2.    Poissons ratio
  3.    Shear modulus
  4.    Both Youngs modulus and shear modulus
 Discuss Question
Answer: Option A. -> Youngs modulus
Answer: (a).Youngs modulus

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