FRIT 100 Mechanics of Solids MCQ question on Simple Stress and Strain | 2022 UPDATE

Mechanics of Solids MCQ question on Simple Stress and Strain 1. Stress is (a)External force (b)Internal resistive force (c)Axial force (d)Radial force (Ans:b) 2. Following are the basic types of stress except (a)Tensile stress (b)Compressive stress (c)Shear stress (d)Volumetric stress (Ans:d) 3. When tensile stress is applied axially on a circular rod its (a)diameter decreases (b)length increases (c)volume decreases (d)Which of the above are true? Only (a) Only (b) (a)&(b) All of the above (Ans:c) 4. Which of the following is not a basic type of strain? (a)Compressive strain (b)Shear strain (c)Area strain (d)Volume strain (Ans:c) 5. Tensile Strain is (a)Increase in length / original length (b)Decrease in length / original length (c)Change in volume / original volume (d)All of the above (Ans:a) 6. Compressive Strain is (a)Increase in length / original length (a)Decrease in length / original length (c)Change in volume / original volume (d)All of the above (Ans:b) 7. Volumetric Strain is (a)Increase in length / original length (b)Decrease in length / original length (c)Change in volume / original volume (d)All of the above (Ans:c) 8. Hooke’s law is applicable within (a)Elastic limit (b)Plastic limit (c)Fracture point (d) Ultimate strength (Ans:a) 9. Young’s Modulus of elasticity is (a)Tensile stress / Tensile strain (b)Shear stress / Shear strain (c)Tensile stress / Shear strain (d)Shear stress / Tensile strain (Ans:a) 10. Modulus of rigidity is (a)Tensile stress / Tensile strain (a)Shear stress / Shear strain (a)Tensile stress / Shear strain (a)Shear stress / Tensile strain (Ans:b) 30 11. Bulk modulus of elasticity is a. Tensile stress / Tensile strain b. Shear stress / Shear strain c. Tensile stress / Shear strain d. Normal stress on each face of cube / Volumetric strain (Ans:d) 12. Factor of safety is a. Tensile stress / Permissible stress b. Compressive stress / Ultimate stress c. Ultimate stress / Permissible stress d. Ultimate stress / Shear stress (Ans:c) 13. Poisson’s ratio is a. Lateral strain / Longitudinal strain b. Shear strain / Lateral strain c. Longitudinal strain / Lateral strain d. Lateral strain / Volumetric strain (Ans:a) 14. A rod, 120cm long and of diameter 3.0 cm is subjected to an axial pull of 18 kN. The stress in N/mm2 is. a. 22.57 b. 23.47 c. 24.57 d. 25.47 (Ans:d) 15. The total extension in a bar, consists of 3 bars of same material, of varying sections is a. P/E(L1/A1+L2/A2+L3/A3) b. P/E(L1A1+L2A2+L3A3) c. PE(L1/A1+L2/A2+L3/A3) d. PE(L1/A1+L2/A2+L3/A3) Where P=Load applied, E=young’s modulus for the bar, L1,2,3=Length of corresponding bars, A1,2,3=Area of corresponding bars (Ans:a) 16. The relationship between Young’s modulus (E), Bulk modulus (K) and Poisson’s ratio (µ) is given by a. E=2K(1-2µ) b. E=3K(1-2µ) c. E=2K(1-2µ) d. E=2K(1-3µ) (Ans:b) 17. The relationship between Young’s modulus (E), Modulus of rigidity (C) and Bulk modulus (K) is given by a. E=9CK/(C+3K) b. E=9CK/(2C+3K) c. E=9CK/(3C+K) d. E=9CK/(C-3K) (Ans:a) 18.The total extension of a taper rod of length ‘L’ and end diameters ‘D1’ and ‘D2’, subjected to a load (P), is given of a. 4PL/ΠE. D1D2 b. 3PL/ΠE. D1D2 c. 2PL/ΠE. D1D2 d. PL/ΠE.D1D2 Where E=Young’s modulus of elasticity (Ans:a) 19. A rod 3 m long is heated from 10°C to 90°C. Find the expansion of rod. Take Young’s modulus = 1.0 x 10^5 MN/m2 and coefficient of thermal expansion = 0. per degree centigrade. 1. 0.168 cm 2. 0.208 cm 3. 0.288 cm 4. 0.348 cm (Ans:c) 20. Elongation of a bar of uniform cross section of length ‘L’, due to its own weight ‘W’ is given by a. 2WL/E b. WL/E c. WL/2E d. WL/3E Where, E=Young’s modulus of elasticity of material (Ans:c) 31. The deformation per unit length is called (a) Strain (b) Stress (c) Elasticity (d) None of these (Ans: a) 32. The ability of the material to deform without breaking is called (a) Elasticity (b) Plasticity (c) Creep (d) None of these (Ans:b) 33. Which of the following material is more elastic? (a) Rubber (b) Glass (c) Steel (d) Wood (Ans:c) 34. The percentage elongation and the percentage reduction in area depends upon (a) Tensile strength of the material (b) Ductility of the material (c) Toughness of the material (d) None of these (Ans:b) 35. The property of a material by which it can be beaten or rolled into thin sheets, is called (a) Elasticity (b) Plasticity (c) Ductility (d) Malleability (Ans:d) 39. The property of a material by which it can be drawn to a smaller section by applying a tensile load is called (a) Elasticity (b) Plasticity (c) Ductility (d) Malleability (Ans:c) 40. If a material has identical properties in all directions, it is called (a) Elastic (b) Plastic (c) Isotropic (d) Homogeneous (Ans:c) 41. The stress at which extension of a material takes place more quickly as compared to increase in load, is called (a) No elastic zone (b) Plastic point (c) Yield point (d) Breaking point (Ans:c) 42. A brittle material has (a) No elastic zone (b) No plastic zone (c) Large plastic zone (d) None of these (Ans:b) 43. Every material obeys the Hooke’s law within (a) Elastic limit (b) Plastic limit (c) Limit of proportionality (d) None of these (Ans:c) 46. The ratio of lateral strain to linear strain is called (a) Modulus of Elasticity (b) Modulus of Rigidity (c) Bulk Modulus (d) Poisson’s Ratio (Ans:d) 48. A perfectly elastic body (a) Can move freely (b) Has perfectly smooth surface (c) Is not deformed by any external surface (d) Recovers its original size and shape when the deforming force is removed. (Ans:d) 49. The value of Poison’s ratio depends upon (a) Nature of load, tensile or compressive (b) Magnitude of load (c) Material of the test specimen (d) Dimensions of the test specimen (Ans:c) 50. When a section is subjected to two equal and opposite forces tangentially to the section, the stress produced is known as (a) Tensile stress (b) Lateral stress (c) Shear stress (d) No stress (Ans:c) 51. Which of the following is a dimensionless quantity? (a) Shear stress (b) Poison’s ratio (c) Strain (d) Both (b) and (c) (Ans:d) 52. Percentage elongation during tensile test is indication of (a) Ductility (b) Malleability (c) Creep (d) Rigidity (Ans:a) 53. Brittleness is opposite to (a) Toughness (b) Plasticity (c) Malleability (d) None of these (Ans:b) 54.The statement : stress is proportional to strain, i.e. the Hooke’s law holds good upto (a) Elastic Limit (b) Proportional Limit (c) Plastic Limit (d) Yield point (Ans:b) 55. The limit beyond which the material