Correct : A. ability to re-gain It's original size and shape
2. What is modular ratio?
Correct : C. ratio of load acting in each section
3. 3.5 m long bar is under tensile load and due to that increase in length of bar is 1.75 mm then strain =
Correct : C. 0.002
4. The increase in the length of a bar of length 1 m, area 300 mm2, modulus of elasticity 2×10^5 N/mm2 due to a tensile load of 120 KN is .
Correct : B. 2mm
5. Shear stress causes .
Correct : D. None of above
6. which of the following has same unit?
Correct : A. modulus of elasticity, pressure, stress
7. unit of stress is .
Correct : D. a and c both
8. In composite section deformation is same in both materials.
Correct : A. True
9. which of the following is type of stress?
Correct : D. all of the above
10. Strain is defined as the ratio of
Correct : B. change in length to original length
11. Hooke's law holds good up to
Correct : B. limit of proportionality
12. Young's modulus is defined as the ratio of
Correct : A. volumetric stress and volumetric strain
13. The unit of Young's modulus is
Correct : D. kg/cm2
14. Deformation per unit length in the direction of force is known as
Correct : D. linear stress
15. It equal and opposite forces applied to a body tend to elongate it, the stress
so produced is called
Correct : C. transverse stress
16. The materials having same elastic properties in all directions are called
Correct : D. elastic materials.
17. Modulus of rigidity is defined as the ratio of
Correct : D. shear stress and shear strain
18. If the radius of wire stretched by a load is doubled, then its Young's modulus will be
Correct : D. remain unaffected
19. The intensity of stress which causes unit strain is called
Correct : C. modulus of rigidity
20. Which of the following has no unit
Correct : C. bulk modulus
21. Euler's formula states that the buckling load P for a column of length l, both ends hinged and whose least moment of inertia and modulus of elasticity of the material of the column are I and E respectively, is given by the relation
Correct : C. P=πEIL2
22. Rankine-Golden formula accounts for direct as well as buckling stress and is applicable to
Correct : D. intermediate columns
23. Maximum deflection of a cantilever due to pure bending moment M at its free
end, is
Correct : D. ML2/2EI
24. The ratio of the effective length of a column and minimum radius of gyration of
its cross-sectional area, is known
Correct : B. slenderness ratio
25. A long vertical member, subjected to an axial compressive load, is called
Correct : A. a column
26. Columns of given length, cross-section and material have different values of buckling loads for different end conditions. The strongest column is one whose
Correct : D. both the ends are fixed
27. The slenderness ratio of a vertical column of square cross- section of 10 cm side and 500 cm long, is
Correct : C. 173.2
28. The equivalent length of a column fixed at one end and free at the other end, is
Correct : D. 2L
29. The radius of gyration of a squar section is not proportional to
Correct : D. side of squar
30. The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 kN/cm2, the permissible maximum crippling load will be
Correct : D. 288.0 kN
31. A sudden increase or decrease in shear force diagram between any two points indicates that there is
Correct : D. None of these
32. A beam is a structural member which is subjected to
Correct : B. Transverse loads and couples
33. Which of the following are statically determinate beams?
Correct : B. Cantilever, overhanging and simply supported
34. A cantilever is a beam whose
Correct : B. One end is fixed and other end is free
35. In a cantilever carrying a uniformly varying load starting from zero at the free end, the shear force diagram is
Correct : C. Follows a parabolic law
36. In a cantilever carrying a uniformly varying load starting from zero at the free end, the Bending moment diagram is
Correct : D. Follows a cubic law
37. In a simply supported beam, bending moment at the end
Correct : A. Is always zero if it does not carry couple at the end
38. For any part of the beam, between two concentrated load Shear force diagram is a
Correct : A. Horizontal straight line
39. For any part of a beam between two concentrated load, Bending moment
diagram is a
Correct : C. Line inclined to x-axis
40. For any part of a beam subjected to uniformly distributed load, Shear force
diagram is
Correct : C. Line inclined to x-axis
41. For any part of a beam subjected to uniformly distributed load, bending moment
diagram is
Correct : D. Parabola
42. In a simple supported beam having length = l and subjected to a concentrated
load (W) at mid-point.
Correct : A. Maximum Bending moment = Wl/4 at the mid-point
43. In a cantilever subjected to a concentrated load (W) at the free end and having length =l, Maximum bending moment is
Correct : B. Wl at the fixed end
44. At a point in a simply supported or overhanging beam where Shear force changes sign and = 0, Bending moment is
Correct : A. Maximum
45. In a cantilever subjected to a combination of concentrated load, uniformly distributed load and uniformly varying load, Maximum bending moment is
Correct : C. At the fixed end
46. Point of contra-flexure is a
Correct : D. Point where Bending moment=0 but also changes sign from positive to negative
47. Point of contra-flexure is also called
Correct : C. Point of inflexion
48. The slope of shear force line at any section of the beam is also called
Correct : B. Rate of loading at that section
49. The direction of shear stress in a loaded beam is
Correct : B. Horizontal as well as vertical
50. Shear stress in the beam acting on the cross section is
Correct : B. Tangential to the cross section
51. Which type of load is applied in tensile testing?
Correct : C. Transverse load
52. Which law is also called as the elasticity law?
Correct : C. Hooke’s law
53. The materials which have the same elastic properties in all directions are called __________
Correct : A. Isotropic
54. The calculation of the moment of the body due to the loadings involve a quantity called ____________
Correct : C. Moment of Inertia
55. Moment of Inertia is the integration of the square of the distance of the centroid
and the del area along the whole area of the structure.
Correct : A. True
56. What is parallel axis theorem and to whom it is applied?
Correct : A. Theorem used to add the two mutually perpendicular moment of inertias for areas
57. The parallel axis theorem gives the moment of inertia ______________ to the surface of considerance.
Correct : C. Perpendicular
58. In the calculation of the radius of gyration, we use intensity of loadings. So whenever the distributed loading acts perpendicular to an area its intensity varies __________
Correct : A. Linearly
59. Elongation of a bar of uniform cross section of length „L‟, due to its own weight „W‟ is given by
Correct : C. WL/2E
60. steel bar 10 mm x 10 mm cross section is subjected to an axial tensile load of 20kN. If the length of bar is 1 m and E = 200 GPa, then elongation of the bar is:
Correct : A. 1 mm
61. The modulus of rigidity and poisson‟s ratio of a material are 80 GPa and 0.3 respectively. Its young‟s modulus will be
Correct : D. 104 GPa
62. If the value of poisson‟s ratio is zero
Correct : C. there is no linear strain in the material
63. The ratio between direct stress and volumetric strain is:
Correct : A. Bulk modulus
64. Young‟s modulus of a material which gives 2 kN/mm2 stress at 0.01 strain
is
Correct : C. 200 kN/mm2
65. The Young‟s modulus of elasticity of a material is 2.5 times its modulus of rigidity. The Poisson‟s ratio for the material will be
Correct : A. 0.25
66. Consider a 250mmx15mmx10mm steel bar which is free to expand is heated from 150C to 400C. what will be developed?
Correct : D. No stress
67. The safe stress for a hollow steel column which carries an axial load of 2100 kN is 125 MN/m2. if the external diameter of the column is 30cm, what will be the internal diameter?
Correct : B. 26.19cm
68. The percentage reduction in area of a cast iron specimen during tensile test would be of the order of
Correct : D. negligible.
69. In a tensile test, near the elastic limit zone, the
Correct : A. tensile strain increases more quickly
70. The stress necessary to initiate yielding is
Correct : A. considerably greater than that necessary to continue it
71. Rupture stress is
Correct : D. load at breaking point/neck area
72. stress at which extension of material takes place more quickly as compared
to increase in load is called
Correct : D. yielding point of the material
73. The energy absorbed in a body, when it is strained within the elastic limits,
is known as
Correct : A. strain energy
74. Resilience of a material is considered when it is subjected to
Correct : D. shock loading
75. The maximum strain energy that can be stored in a body is known as
Correct : C. proof resilience
76. The total strain energy stored in a body is termed as
Correct : A. resilience
77. Proof resilience per material is known as
Correct : C. modulus of resilience
78. The stress induced in a body due to suddenly applied load compared to when it is applied gradually is
Correct : C. two times
79. strain energy stored in a body due to suddenly applied load compared to
when it is applied gradually is
Correct : C. four times
80. During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is
Correct : B. 8 tonnes/cm2
81. Tensile strength of a material is obtained by dividing the maximum load
during the test by the
Correct : B. original cross-sectional area
82. An axial pull of 50 KN is suddenly applied to a steel bar 2 m long and 1000 mm2 in cross-section. If modulus of elasticity is 200 GPa, find strain energy stored in the bar
Correct : D. 50,000 N.mm
83. A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is
Correct : C. 16 cm2
84. A 10 m long mild steel rail section is fixed at 300 K temperature. If temperature increases by 60 K, find stress in rail section if ends are not yielded. Coefficient of thermal expansion is 12×10-6/K.
Correct : B. 144 N/mm2
85. The ultimate shear stress of a mild steel plate of 10 mm thickness is 350 N/mm2. Calculate the diameter of the hole that can be punched to it without exceeding a compressive stress of 700 N/mm2.
Correct : B. 20 mm
86. A bar 2 m long and 20 mm diameter is subjected to an axial pull of 125.6 KN. Due to this load, length increases by 4 mm and diameter reduce by 0.012 mm. Find Poison‟s ratio.
Correct : C. 0.3
87. A composite section of R.C.C. column 300mm×300mm in section having 20mm diameter 4 bars, one at each corner. Strength of concrete is 5 N/mm2 and modular ratio Es/Ec=9. Calculate load taken by column.
Correct : D. 500 KN
88. The moment of inertia of a triangular section of base 3 unit and height 2 unit, about an axis passing through its base is .
Correct : D. 2
89. Moment of inertia of a square of side 1 unit about an axis through its center of gravity, is .
Correct : B. 1/12
90. The axis about which moment of area is taken is known as .
Correct : C. Axis of reference
91. What is the formula of theorem of parallel axis?
Correct : B. Iab = ah2 + Ig
92. Moment of inertia of a circular section of 2 cm diameter, about an axis through its centre of gravity, is .
Correct : B. π/4
93. What is the unit of section modulus?
Correct : C. mm3
94. What is the formula of theorem of perpendicular axis?
Correct : C. Izz – Ixx = Iyy
95. What is the unit of moment of inertia?
Correct : D. mm4
96. What is the unit of Radius of gyration?
Correct : A. mm
97. What is the formula of radius of gyration?
Correct : A. k2 = I/A
98. What will be the radius of gyration of a circular plate of diameter 10cm?
Correct : C. 2.5cm
99. Moment of inertia of any section about an axis passing through its C.G is
Correct : B. Minimum
100. The moment of inertia of a triangular section of base „b‟ and height „h‟ about an axis passing through its base is ……. times the moment of inertia about an axis passing through its C.G. and parallel to the base