Elastic Behaviour MCQ

Test your knowledge with important Elastic Behaviour MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Elastic Behaviour MCQs at Bissoy

• The effect of the stress riser is much more pronounced in a brittle material than a ductile material. Which of the following is not the correct explanation for this behavior?
  ক

  Strain hardening occurs in ductile material, which increases the required stress for the flow of crack

  খ

  Strain hardening does not occur in a brittle material, so it results in sudden propagation of the crack

  গ

  Redistribution of stress does not occur in a brittle material

  ঘ

  The toughness of brittle material is much more than ductile material
• The following diagram shows a rectangular plate with a circular hole at the ends. The dimension of the plate is shown in the figure. If the ratio of r/h increase, the stress concentration factor Kt will ______________
  ক

  increase

  খ

  decrease

  গ

  remain constant

  ঘ

  cannot comment
• The following diagram shows a rectangular plate with a circular hole at the ends. The dimension of the plate is shown in the figure. If the ratio of b/r increase, the stress concentration factor Kt will __________
  ক

  increase

  খ

  decrease

  গ

  remain constant

  ঘ

  cannot comment
• The value of stress concentration for circular hole in a plate subjected to uniform stress of σ is equal to ________
  ক

  1

  খ

  4

  গ

  3

  ঘ

  10
• In addition to producing the stress concentration, a notch also creates a localized condition of the biaxial or triaxial stress.
  ক

  True

  খ

  False
• The stress concentration is generally expressed by a theoretical stress-concentration factor kt. Generally, Kt is described as the ratio of _________________
  ক

  σmax / σmin

  খ

  σmin/ σmax

  গ

  σmax/σnominal

  ঘ

  σnominal/σmax
• A geometrical discontinuity in a body, such as a hole or a notch result in nonuniform distribution of stress at the vicinity of discontinuity. At the region near the discontinuity, the local stress will be higher than normal stress distribution.
  ক

  True

  খ

  False
• Which of the following factors change the value of the elastic constant of any material?
  ক

  Heat treatment

  খ

  Vacancy

  গ

  Temperature

  ঘ

  Dislocation
• The elastic constant of a material is determined by the ________________ of potential energy vs interatomic distance curve.
  ক

  slope

  খ

  curvature

  গ

  x-intercept

  ঘ

  minimum
• The variation of interatomic energy with atomic distance is given by the following equation V(r)=4ε Where V(r) is the potential energy, and r is interatomic distance. ε and σ are constant. Find the value of energy at the point where the interatomic force is zero?
  ক

  Where V(r) is the potential energy, and r is interatomic distance. ε and σ are constant. Find the value of energy at the point where the interatomic force is zero? ] – ε

  খ

  (σ/r12)−(σ/r6)

  গ

  (σ/r12)−(σ/r6)

  ঘ

  (σ/r12)−(σ/r6)
• The following equation gives the variation of interatomic energy with atomic distance: V(r)=4ε Where V(r) is the potential energy and r is interatomic distance. ε and σ are constant. Find the value of interatomic distance where energy is minimum?
  ক

  Where V(r) is the potential energy and r is interatomic distance. ε and σ are constant. Find the value of interatomic distance where energy is minimum? ] 0

  খ

  (σ/r12)−(σ/r6)

  গ

  (σ/r12)−(σ/r6)

  ঘ

  (σ/r12)−(σ/r6)
• Elastic constant of crystal does not vary with the orientation of the crystal.
  ক

  True

  খ

  False
• If the interatomic distance between 2 atoms is changed from the equilibrium position, then the nature of force will be _____________ when interatomic distance is decreased from equilibrium; and the nature of force will be _____________ when interatomic distance is increased.
  ক

  attractive, repulsive

  খ

  repulsive, attractive

  গ

  attractive, attractive

  ঘ

  repulsive, repulsive
• In the following Potential energy vs. interatomic distance chart, interatomic force between the atoms will be zero at point __________
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• Elastic constant is greatly influenced by the interatomic force between atoms. The following diagram represents the relationship between the interatomic distance and atomic potential energy. Equilibrium interatomic distance is denoted by point ____________
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• In the universal testing machine for tension test, the output raw data are in the form of ________
  ক

  Load vs. Elongation

  খ

  Engineering stress vs. Engineering Strain

  গ

  True Stress vs. True strain

  ঘ

  Torque vs. Angle
• The elastic strain energy is equal to the area under the stress-strain curve up (from origin to the elastic limit).
  ক

  True

  খ

  False
• In the case of pure normal forces, shear stresses develop in all planes except the planes where normal stresses are maximum.
  ক

  True

  খ

  False
• In the case of pure shear forces, normal stresses develop in all the planes except the planes where shear stresses are maximum.
  ক

  True

  খ

  False
• In 2-dimensional state of stress, shear stress maximum (τmax) occurs on a plane halfway between the two principal planes.
  ক

  True

  খ

  False
• A cubic shape body is subjected to stress as shown in the figure below. Both are stresses are equal in magnitude but opposite in direction. Calculate the shear stresses on black plane and green plane.
  ক

  Black=σ, green=0

  খ

  Black=σ, green=σ/2

  গ

  Black=σ/2, green=σ/2

  ঘ

  Black=σ, green=σ
• A cubic shape body is subjected to stresses as shown in the figure below. If both are stresses are equal in magnitude, calculate the shear stresses on black and green planes.
  ক

  Black=σ/2, green=0

  খ

  Black=0, green=σ/2

  গ

  Black=σ/2, green=σ/2

  ঘ

  Black=σ, green=σ
• If Two of the 3 principal stresses are zero, the state of stress is known as __________
  ক

  cylindrical

  খ

  uniaxial

  গ

  spherical/hydrostatic

  ঘ

  triaxial
• The three-dimensional state of stress consists of 3 unequal principal stresses acting on a point, this is called the triaxial state of stress. If all the three principal stresses are equal, the state of stress is known as __________
  ক

  cylindrical

  খ

  uniaxial

  গ

  spherical/hydrostatic

  ঘ

  triaxial
• The 3-dimensional state of stress consists of 3 unequal principal stresses acting on a point, this is called the triaxial state of stress. If two of the three principal stresses are equal, the state of stress is known as __________
  ক

  cylindrical

  খ

  uniaxial

  গ

  spherical/hydrostatic

  ঘ

  triaxial
• What does σij represent in a 3×3 stress matrix?
  ক

  Stress is applied on i face of the material in the +ve j direction

  খ

  Stress is applied on i face of the material in the -ve j direction

  গ

  Stress is applied on j face of the material in the +ve i direction

  ঘ

  Stress is applied on j face of the material in the -ve i direction
• Calculate the dilation of body, given that the initial volume is 250 mm2 and final volume is 235.5 mm2.
  ক

  0.058

  খ

  0.061

  গ

  0.050

  ঘ

  0.060
• Calculate the hydrostatic strain, if εx, εy, εz are 0.01, 0.2, 0.05 respectively?
  ক

  0.2

  খ

  0.866

  গ

  0.125

  ঘ

  1
• Experimentally, strain in the material with high precision is measured by _________ method.
  ক

  calorimetry

  খ

  hardness testing

  গ

  bonded wire resistance gauge

  ঘ

  microscopy
• The part of strain tensor which involves in the shape change rather than the volume change is called strain deviator ε’ij.
  ক

  True

  খ

  False