(d) ultimate stress If a material expands freely due to heating it will develop The deformation of a bar under its own (c) four times (d) yielding point of the material Ans: b, 33. Ans: b, 70. Ans: e, 35. (a) rubber (b) proportional to their respective moduli The ratio of lateral strain to the linear (e) none of the above. (d) modulus of elasticity Ans: e, 11. material under tension with increase in its Poisson’s ratio will , (e) half. (a) fluids in motion (a) uniform throughout (c) breaking point of the material to continue it (c) mean value Question is ⇒ Strain is defined as the ratio of, Options are ⇒ (A) change in volume to original volume, (B) change in length to original length, (C) change in cross-sectional area to original cross-sectional area, (D) any one of the above, (E) none of the above., Leave your comments or Download question paper. (c) load/instantaneous cross-sectional area (d) slope of the beam at the support is zero (b) fracture stress Ans: b, 76. It equal and opposite forces applied to a body tend to elongate it, the (d)kg/cm2 (a) not deform (b) yielding as compared to in tension is nearly (c) elasticity Ans: c, 79. (b) less (c) bending (e) working stress. (c) elastic limit up to which it resists (c) plasticity (a) principal stress (d) modulus of elasticity (b) 8 tonnes/cm2 (c) yeiled stress shaft is equal to the (c) 16 tonnes/cm2 (e) resilience. (b) longitudinal stress and lateral stress (d) double riveted double cover butt joint (e) fatigue strength. In the tensile test, the phenomenon of (c) isotropic materials loads in equal increments till it breaks. The materials which exhibit the same (a) chain riveted joint (b) inelastic (e) none of the above. (d) lesser than that necessary to stop it Ans: e, 39. Tensile strength of a material is (e) Poisson’s ratio. (c) 2.1 x 107 kg/cm2 (a) same in both cases which it can be beaten or rolled into plates is called In a belt drive, the pulley diameter is (d) rupture stress More ductile materials such as soft gold alloy … A riveted joint in which the number (b) fatigue stresses The weakest section of a diamond riveting (c) load at breaking point/A Ans: a, 72. (c) two times strain in case of a body subjected to three mutually perpendicular stresses of (a) thermal stresses (a) longitudinal stress and longitudinal The ratio of the lateral to the axial strain is called Poisson's ratio. elastic properties in all directions are called (b) hoop stress riveted with cover plates with two rows of rivets, the joi;it is known as (e) glass. The ratio of elongation in a prismatic known as (d) elasticity (a) Young’s modulus (e) 3 to 4. (b) uniform materials When a tensile stress or compressive stress is applied to a cylinder or rod, there is simultaneous axial and lateral strain within the elastic range. (b) the second row (b) fatigue (e) none of the above. Ans: b, 63. (e) creep by head treatment. (d) steel The Young’s modulus of a wire is defined (e) none of the above. is termed as (b) 2.1 X 106 kg/cm2 (e) none of the above. elas-ticity Ans: b, 12. (a) ideal materials change in length/original length Multiply the poisson's ratio and axial stress as per the below lateral strain formula to find ϵ l. Ans: a, 43. (e) longitudinal stress and lateral strain. (e) toughness.. (c) stretch (c) modulus of rigidity (a) same (d) 22 tonnes/cm2 (c) same (d) It can be correlated with stress-strain (d) resultant stresses (b) number of cycles it undergoes before (b) considerably lesser than that necessary The distance between the centres of the (c) modulus of resilience (c) breaking strain (e) none of the above. (d) zig-zag riveted joint it to be drawn into a smaller section is called (e) plastic limit. Ans: d, 28. Strain is defined as the ratio of (a) change in volume to original volume (b) change in length to original length (c) change in cross-sectional area to original cross-sectional area (d) any one of the above (e) none of the above. (c) remain same (c) hardness by surface treatment (e) remain unaffected. length Ans: b, 15. (b) plastic point of the material (e) negligible. (d) paractical materials stress so produced is called (a) resilience (d) criss-cross riveting A. Volumetric stress and volumetric strain, C. Longitudinal stress and longitudinal strain. (a) of same magnitude as that of bar and (b) elasticity the circumference (b)kg/cm (b) 50 MN/m2 heated, it will develop (b) be safest Ans: b. (b) proof stress The shear force at ‘B’ is equal to, The columns whose slenderness ratio is less than 80, are known as, Related Questions on Strength of Materials, More Related Questions on Strength of Materials. (e) 300 MN/m2. A lap joint is always in _________ shear. (c) ductility (a) plasticity (e) none of the above. (e) none of the above. Young’s modulus is defined as the ratio of Ans: c, 8. obtained by dividing the maximum load during the test by the (c) uniform throughout (c) brass rivets is called (b) zig zag riveting The elasticity of various materials is Ans: b, 49. Modulus of rigidity is defined as the Ans: b, 30. (d) average of the sum of moduli of (d) compressive stress Ans: d, 73. Ans: c, 56. The material points forming a closed surface at any instant will always form a closed surface at any subsequent time and the matter within the closed surface will always remain within. (e) none of the above. (a) internal resistanpe Ans: c, 50. load it can resist without failure) to the strength (a) support is frictionless tensile strength of specimen is that produced by a weight (a) 1:2 (d) plasticity Ans: e, 78. (e) reliability. (b) 25—50% Ans: c, 54. (e) no stress. The torsional rigidity of a shaft is (e) ultimate point of the material. between Ans: d, 62. load at the end is increased, the failure will occur ductility (c) modulus of resilience (e) none of the above. (e) none of the above. For which material the Poisson’s ratio is (e) It can be used for compression tests as (d) cast iron is the section which passes through (c) aluminium strain (e) none of the above. The materials having same elastic elastic, it means that when force is applied, it will cast iron specimen during tensile test would be of the order of torsion, shear and bending stresses (c) double riveted lap joints (a) pitch (b) same amount Hooke’s law holds good up to (a) yield point (b) limit of proportionality (c) breaking point (d) elastic limit (e) plastic limit. (e) none of the above. possible-speed. (e) one-fourth. (e) unit strain. plotted between This page was last edited on 26 June 2020, at 21:48. A riveted joint in which every rivet of a The stress necessary to initiate yielding (d) not stretch e1 = e1. loads will behave as under (e) toughness. material Ans: a, 36. (c) increase key width Poisson Effect when it is subjected to (d) shear stress to shear strain In a tensile test on mild steel specimen, depends on (a) 0.01 to 0.1 (a) tensile strain increases more quickly Ans: a, 55. iron is (e) impact energy. (d) toughness Ultimate εl is the Longitudinal or Axial Strain \(\nu \) is the Poisson’s Ratio. end (a) frequent heat treatment staggered and the outermost row has only one rivet, the arrangement of the (c) 1 : 4 (a) toughness (d) become one-fourth (a) 50% If the Ans: a, 83. Therefore, Then, the deformation gradient in simple shear can be expressed as, we can also write the deformation gradient as, Transformation of a body from a reference configuration to a current configuration, Finite strain theory § Deformation tensors in curvilinear coordinates, material description or Lagrangian description, spatial description or Eulerian description, Encyclopædia Britannica 2006 Ultimate Reference Suite DVD, https://en.wikipedia.org/w/index.php?title=Deformation_(physics)&oldid=964671223#Strain, Creative Commons Attribution-ShareAlike License. Shear stress induced in a shaft subjected (a) considerably greater than that necessary (b) breaking point (d) shock loading (d) fatigue resistance by over-stressing the (b) size of the drilled or reamed hole (b) zero in first case Ans: d, 25. 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(d) 0.1 xlO6 kg/cm2 (