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MCQs

Total Questions : 90 | Page 8 of 9 pages
Question 71. What will be the value of the Poisson’s ratio if the Youngs modulus E is equal to the bulk modulus K?
  1.    1/2
  2.    1/4
  3.    1/3
  4.    3/4
 Discuss Question
Answer: Option C. -> 1/3
Answer: (c).1/3
Question 72. What is the limiting values of Poisson’s ratio?
  1.    -1 and 0.5
  2.    -1 and -0.5
  3.    -1 and -0.5
  4.    0 and 0.5
 Discuss Question
Answer: Option D. -> 0 and 0.5
Answer: (d).0 and 0.5
Question 73. What is the relationship between Youngs modulus E, modulus of rigidity C, and bulk modulus K?
  1.    E = 9KC / (3K + C)
  2.    E = 9KC / (9K + C)
  3.    E = 3KC / (3K + C)
  4.    E = 3KC / (9K + C)
 Discuss Question
Answer: Option A. -> E = 9KC / (3K + C)
Answer: (a).E = 9KC / (3K + C)
Question 74. What is the expression for modulus of rigidity in terms of modulus of elasticity and the Poissons ratio?
  1.    G = 3E / 2(1 + μ)
  2.    G = 5E / (1 + μ)
  3.    G = E / 2(1 + μ)
  4.    G = E/ (1 + 2μ)
 Discuss Question
Answer: Option C. -> G = E / 2(1 + μ)
Answer: (c).G = E / 2(1 + μ)
Question 75. What is the relationship between modulus of elasticity and modulus of rigidity?
  1.    C = E / 2(1 + μ)
  2.    C = E / (1 + μ)
  3.    C = 2E / (1 + μ)
  4.    C = 2E / 2(1 + μ)
 Discuss Question
Answer: Option C. -> C = 2E / (1 + μ)
Answer: (c).C = 2E / (1 + μ)
Question 76. What is tensile strain?
  1.    The ratio of change in length to the original length
  2.    The ratio of original length to the change in length
  3.    The ratio of tensile force to the change in length
  4.    The ratio of change in length to the tensile force applied
 Discuss Question
Answer: Option A. -> The ratio of change in length to the original length
Answer: (a).The ratio of change in length to the original length
Question 77. Find the elongation of an steel rod of 100mm length when it is subjected to a tensile strain of 0.005?
  1.    0.2mm
  2.    0.3mm
  3.    0.5mm
  4.    0.1mm
 Discuss Question
Answer: Option C. -> 0.5mm
Answer: (c).0.5mm
Question 78. Find the strain of a brass rod of length 250mm which is subjected to a tensile load of 50kN when the extension of rod is equal to 0.3mm?
  1.    0.025
  2.    0.0012
  3.    0.0046
  4.    0.0014
 Discuss Question
Answer: Option B. -> 0.0012
Answer: (b).0.0012
Question 79. I) Strain is a fundamental behaviour of a material.
ii) Strain does not have a unit.
  1.    Both i and ii are true and ii is the correct explanation of i
  2.    Both i and ii are true but ii is not the correct explanation of i
  3.    i is true but ii is false
  4.    ii is true but i is false
 Discuss Question
Answer: Option B. -> Both i and ii are true but ii is not the correct explanation of i
Answer: (b).Both i and ii are true but ii is not the correct explanation of i
Question 80. A tensile test was conducted on a mild steel bar. The diameter and the gauge length of bat was 3cm and 20cm respectively. The extension was 0.21mm. What is the value to strain?
  1.    0.0010
  2.    0.00105
  3.    0.0105
  4.    0.005
 Discuss Question
Answer: Option B. -> 0.00105
Answer: (b).0.00105

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