Ans: b, 26. (a) 50% (c) 16 tonnes/cm2 Ans: e, 35. Ans: a, 129. (d) one-fourth of weight of bar applied at lower end Stress and Strain.

(a) strain When two plates are butt together and riveted with cover plates with two rows of rivets, the joi;it is known as (e) one-fourth. (c) yeiled stress (d) mechanical advantage is unity If three forces acting in different planes can be represented by a triangle, these will be in These short solved questions or quizzes are provided by Gkseries. (c) 100 MN/m2 (b) original cross-sectional area (c) proof resilience

(c) longitudinal stress and longitudinal strain (d) plasticity Ans: c, 58. (c) half (b) mechanical advantage is equal to velocity ratio Define Modulus Of Elasticity? These pressures are called (b) zig zag riveting (e) elastic materials. The volume of the wire is in fact: Which of these factors doesn't affect the stress of a wire? A2 Phys 4. Ans: c, 24. Answer outline and marking scheme for question: 1. a) i) stress = force / (cross sectional) area. In a tensile test, near the elastic limit zone, the

The M.I. The impact strength of a material is an index of its (d) 124 m (b) ratio of limiting friction and normal reaction

(c) half (e) none of the above. Ans: b, 23. (a) increase key length Ans: d, 73. (b) kg/cm (b) hyperbola Ans: e, 38. (e) none of the above. (c) creep Please send me pdf of above SOM question [email protected]…. True stress-strain curve for materials is plotted between Ans: c, 128.

(e) linear stress and lateral strain.

If the load at the end is increased, the failure will occur (c) proof resilience (a) Young’s modulus (a) equal to the hoop stress Question 7. (b) volumetric stress and volumetric strain

(e) none of the above. (d) mechanical advantage is unity [email protected], Your email address will not be published. of hollow circular section about a central axis perpendicular to section as compared to its M.I. (b) ductility

Then which is correct statement about density of metal (d) elastic limit (You will be awarded marks for the quality of written communication in this part of the question. (a) density of metal can’t be determined thanking You, sir (d) resultant stresses Required fields are marked *. (c) less (e) half. (b) 8 tonnes/cm2 Ans: b, 108. (b) inelastic (e) none of the above. load it can resist without failure) to the strength of the unpunched plate in A cylindrical section having no joint is known as (e) plasticity. I�*z �^�e��S�.���>|���c��������q�-AFypQ���sU�%�>��H]� ����LbF ��a �Oj���z� Z��VV`�M�]��i�d#� �/���Ҕ���3���4r�*y��J��D�. (d) stress at elastic limit Ans: e, 85. (e) seamless section. The C.G. (c) bulk modulus Copyright 2020 , Engineering Interview, 300+ TOP STRENGTH of Materials Multiple Choice Questions and Answers. (b) zero in first case (e) none of the above. (c) wattr (c) kg b) The feet of the freezer have a total cross-sectional area of 8.0 x 10-4 m2. (a) h/2 (a) longitudinal stress In ideal machines The ratio of tensile stress or compressive stress to the corresponding strain is known as modulus of elasticity or young’s modulus and is denoted by E. When a body is subjected to an uniform direct stress in all the three mutually perpendicular directions, the ratio of the direct stress to the corresponding volumetric strain is found to be a constant is called as the bulk modulus of the material and is denoted by K. K =  direct stress / volumetric strain = P/A / dv/v. 1. Ultimate tensile strength of specimen is Ans: c, 54. (e) resonant condition. A kitchen freezer of total mass 300 kg (including contents) rests ona vinyl plastic floor covering.

(c) more inclined when standing (a) more (d) paractical materials The C.G. Longitudinal stress in a thin cylinder is Ans: b, 19. (a) maximum torque it can transmit

(c) one-third Ans: a, 40. (a) tangent of angle between normal reac-tion and the resultant of normal reac-tion and the limiting friction (b) 0.23 to 0.27 (e) none of the above. (e) electrically charged particles. (d) zig-zag riveted joint

(c) capability of being cold worked (c) Wcos(a + ) The total strain energy stored in a body is termed as Ans: c, 71. Mathematically stress is written as. (d) both of above are wrong (e) 240 m. (b) slant up towards direction of pull Explain how to use your readings to obtain the Young's modulus. (a) breaking stress Ans: b, 150. (c) change in cross-sectional area to original cross-sectional area (b) fatigue stresses (a) 0.1 to 0.2 (e) reliability. Find the extension caused in the wire, by attaching a weight of 100N, if the material of the wire has the Young's modulus (E) of 200x1011Nm-2. (e) none of the above. Ans: a, 90. The property of a material by virtue of which a body returns to its original, shape after removal of the load is called (b) longitudinal stress and lateral stress The ultimate tensile stress of mild steel compared to ultimate compressive stress is (a) tough (b) 50 MN/m2

(d) lesser than that necessary to stop it (b) proof resilience (a) non-equilibrium Question 11. Ans: b, 7.

The C.G. Ans: c, 4. A beam is loaded as cantilever. (b) meet at one point ; Ans: c, 79. (e) none of the above. Sample Values for Young's Modulus. (c) tensile strain increases in proportion to the stress (a) strain energy unit =...................................... ii) Describe, with the aid of a diagram, an experiment to determine the Young's modulus of steel in the form of a wire. (d) diametral pitch (c) single riveted single cover butt joint (c) at least two of them must meet

(b) bulk modulus The relationship between modulus of elasticity, modulus of rigidity and Poisson’s ratio is given by. b) i) Distinguish between elastic and plastic behavior when materials are stretched. (a) 0.01 to 0.1

�����V)�5ZX�j&+���r���A�J.V ��n"��������a-�iѲW��T��d�#L^�N�D8� (c) breaking The stress necessary to initiate yielding is Ans: c, 6. (e) kg m x (m/sec)2. When it is indicated that a member is elastic, it means that when force is applied, it will (e) It can be used for compression tests as well. Topic 7. If a part is constrained to move and heated, it will develop (e) impact energy. (d) eight times Ans: d, 117. Your email address will not be published. (e) remain unaffected. This ratio is Poisson’s ratio and it is generally denoted by 1/m or µ. Poisson’s ratio 1/m = µ = linear starin/ lateral starin. When the disc is about to start moving, its top horizontal force will (e) any one of the above. (d) modulus of elasticity (b) ductility (e) none of the above. Ans: d, 127. Ans: d, 95. (c) 45° stream (c) two lubricated surfaces The maximum strain energy that can be stored in a body is known as Ans: a, 83. (e) none of the above. dL= increase in the length of the body in the direction of P. It is defined as the of ultimate stress to the working stress or permissible stress. (b) maximum load/original cross-sectional area A rod is 0.5 m long and 5 mm diameter. Ans: a, 14. (b) elasticity Ans: e, 46. Ans: d, 17. Topic 5. (a) elastic point of the material The property of a material which allows it to be drawn into a smaller section is called

In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is The effort required to lift a load W on a screw jack with helix angle a and angle of friction
(b) tensile stress (a) pitch (e) longitudinal stress and lateral strain. (a) tensile strain increases more quickly The stress induced in a body due to suddenly applied load compared to when it is applied gradually is (e) none of the above. (d) any one of the above (d) Wsin(a + <(>) (a) doubled Are you person with material engineering then logon to Wisdom jobs online site. (e) none of the above. Ans: d, 44. Ans: b, 3. (d) are equivalent (a) resilience Ans: d, 45. Longitudinal strain: longitudinal strain is defined as the deformation of the body per unit length in the direction of the applied load. (c) bearing If the radius of wire stretched by a load is doubled, then its Young’s modulus will be (a) doubled (b) halved (c) become four times In an ideal exam answer, more detailed descriptions, explanations and arguments are required. (a) chain riveted joint

of a right circular solid cone of height h lies at the following distance from the base (b) pair of scissors TAP Young's Modulus. (b) at the tip below the load

P=external force or load. (c) both (a) and (b) above Questions on Stress and Strain - Answers. Really helpful.. kindly send pdf files of all topics in Mechanical Engineering.

(e) W (sin a + cos ). Deformation per unit length in the direction of force is known as (d) linear stress (a) coplanar (e) Poisson’s ratio. The ratio of lateral strain to the linear strain is a constant for a given material, when the material is stressed within the elastic limit. The percentage reduction in area of a cast iron specimen during tensile test would be of the order of That would be the energy stored if the volume of wire in the test was 1m3. For steel, the ultimate strength in shear as compared to in tension is nearly (d) less inclined when standing The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is (c) half of the square of weight of bar applied at lower end The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of