21. Which is the false statement about true stress-strain method
(a) It does not exist
(b) It is more sensitive to changes in both metallurgical and mechanical conditions
(c) It gives, a more accurate picture of the ductility
(d) It can be correlated with stress-strain values in other tests like torsion, impact, combined stress tests etc.
(e) It can be used for compression tests as well.
Ans: a
22. In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is
(a) more
(b) less
(c) same
(d) more/less depending on composition
(e) may have any value.
Ans: b
23. If a part is constrained to move and heated, it will develop
(a) principal stress
(b) tensile stress
(c) compressive stress
(d) shear stress
(e) no stress.
Ans: c
24. Which of the following materials is most elastic
(a) rubber
(b) plastic
(c) brass
(d) steel
(e) glass.
Ans: d
25. The value of modulus of elasticity for mild steel is of the order of
(a) 2.1xl05 kg/cm2
(b) 2.1 X 106 kg/cm2
(c) 2.1 x 107 kg/cm2
(d) 0.1 xlO6 kg/cm2 (<?) 3.8 x 106 kg/cm2.
Ans: b
26. The value of Poisson's ratio for steel is between
(a) 0.01 to 0.1
(b) 0.23 to 0.27
(c) 0.25 to 0.33
(d) 0.4 to 0.6
(e) 3 to 4.
Ans: c
27. The buckling load for a given material depends on
(a) slenderness ratio and area of cross-section
(b) Poisson's ratio and modulus of elasticity
(c) slenderness ratio and modulus of elasticity
(d) slenderness ratio, area of cross-section and modulus of elasticity
(e) Poisson's ratio and slenderness ratio.
Ans: d
28. The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight
(a) of same magnitude as that of bar and applied at the lower end
(b) half the weight of bar applied at lower end
(c) half of the square of weight of bar applied at lower end
(d) one-fourth of weight of bar applied at lower end
(e) none of the above.
Ans: b
29. The property of a material by virtue of which a body returns to its original, shape after removal of the load is called
(a) plasticity
(b) elasticity
(c) ductility
(d) malleability
(e) resilience.
Ans: b
30. The materials which exhibit the same elastic properties in all directions are called
(a) homogeneous
(b) inelastic
(c) isotropic
(d) isotropic
(e) relativistic.
Ans: c
Read More Questions:
Strength of Materials - Mechanical Engineering MCQs Part1
Strength of Materials - Mechanical Engineering MCQs Part2
(a) It does not exist
(b) It is more sensitive to changes in both metallurgical and mechanical conditions
(c) It gives, a more accurate picture of the ductility
(d) It can be correlated with stress-strain values in other tests like torsion, impact, combined stress tests etc.
(e) It can be used for compression tests as well.
Ans: a
22. In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is
(a) more
(b) less
(c) same
(d) more/less depending on composition
(e) may have any value.
Ans: b
23. If a part is constrained to move and heated, it will develop
(a) principal stress
(b) tensile stress
(c) compressive stress
(d) shear stress
(e) no stress.
Ans: c
24. Which of the following materials is most elastic
(a) rubber
(b) plastic
(c) brass
(d) steel
(e) glass.
Ans: d
25. The value of modulus of elasticity for mild steel is of the order of
(a) 2.1xl05 kg/cm2
(b) 2.1 X 106 kg/cm2
(c) 2.1 x 107 kg/cm2
(d) 0.1 xlO6 kg/cm2 (<?) 3.8 x 106 kg/cm2.
Ans: b
26. The value of Poisson's ratio for steel is between
(a) 0.01 to 0.1
(b) 0.23 to 0.27
(c) 0.25 to 0.33
(d) 0.4 to 0.6
(e) 3 to 4.
Ans: c
27. The buckling load for a given material depends on
(a) slenderness ratio and area of cross-section
(b) Poisson's ratio and modulus of elasticity
(c) slenderness ratio and modulus of elasticity
(d) slenderness ratio, area of cross-section and modulus of elasticity
(e) Poisson's ratio and slenderness ratio.
Ans: d
28. The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight
(a) of same magnitude as that of bar and applied at the lower end
(b) half the weight of bar applied at lower end
(c) half of the square of weight of bar applied at lower end
(d) one-fourth of weight of bar applied at lower end
(e) none of the above.
Ans: b
29. The property of a material by virtue of which a body returns to its original, shape after removal of the load is called
(a) plasticity
(b) elasticity
(c) ductility
(d) malleability
(e) resilience.
Ans: b
30. The materials which exhibit the same elastic properties in all directions are called
(a) homogeneous
(b) inelastic
(c) isotropic
(d) isotropic
(e) relativistic.
Ans: c
Read More Questions:
Strength of Materials - Mechanical Engineering MCQs Part1
Strength of Materials - Mechanical Engineering MCQs Part2
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