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MCQs

Total Questions : 90 | Page 3 of 9 pages
Question 21. For an isotropic, homogeneous and elastic material obeying Hooke’s law, the number of independent elastic constants is ____________
  1.    2
  2.    3
  3.    9
  4.    1
 Discuss Question
Answer: Option B. -> 3
Answer: (b).3
Question 22. What the number that measures an object’s resistance to being deformed elastically when stress is applied to it?
  1.    Elastic modulus
  2.    Plastic modulus
  3.    Poisson’s ratio
  4.    Stress modulus
 Discuss Question
Answer: Option A. -> Elastic modulus
Answer: (a).Elastic modulus
Question 23. What kind of elastic materials are derived from a strain energy density function?
  1.    Cauchy elastic materials
  2.    Hypo elastic materials
  3.    Hyper elastic materials
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> Hyper elastic materials
Answer: (c).Hyper elastic materials
Question 24. The law which states that within elastic limits strain produced is proportional to the stress producing it is known as _____________
  1.    Bernoulli’s law
  2.    Hooke’s law
  3.    Stress law
  4.    Poisson’s law
 Discuss Question
Answer: Option B. -> Hooke’s law
Answer: (b).Hooke’s law
Question 25. What is the factor of safety?
  1.    The ratio of stress to strain
  2.    The raio of permissible stress to the ultimate stress
  3.    The ratio of ultimate stress to the permissible stress
  4.    The ratio of longitudinal strain to stress
 Discuss Question
Answer: Option C. -> The ratio of ultimate stress to the permissible stress
Answer: (c).The ratio of ultimate stress to the permissible stress
Question 26. If the material has identical elastic properties in all directions, it is called ____________
  1.    Elastic
  2.    Isotropic
  3.    Plastic
  4.    Homogeneous
 Discuss Question
Answer: Option B. -> Isotropic
Answer: (b).Isotropic
Question 27. The material in which large deformation is possible before absolute failure by rupture is called ____________
  1.    Plastic
  2.    Elastic
  3.    Brittle
  4.    Ductile
 Discuss Question
Answer: Option D. -> Ductile
Answer: (d).Ductile
Question 28. What is a creep?
  1.    Gradual increase of plastic strain with time at constant load
  2.    Gradual increase of elastic strain with time at constant load
  3.    Gradual increase of plastic strain with time at varying load
  4.    Gradual increase of elastic strain with time at varying load
 Discuss Question
Answer: Option A. -> Gradual increase of plastic strain with time at constant load
Answer: (a).Gradual increase of plastic strain with time at constant load
Question 29. Why is the strain the fundamental property but not the stress?
  1.    Because it is dimensionless
  2.    Because it is a ratio
  3.    Because it’s value is calculated in the laboratory
  4.    No stress is the fundamental property
 Discuss Question
Answer: Option C. -> Because it’s value is calculated in the laboratory
Answer: (c).Because it’s value is calculated in the laboratory
Question 30. If the material has different elastic properties in perpendicular directions, it is called ____________
  1.    Elastic
  2.    Isotropic
  3.    Orthotropic
  4.    Plastic
 Discuss Question
Answer: Option C. -> Orthotropic
Answer: (c).Orthotropic

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