1. A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be
Correct : B. double
2. The deformation of a bar under its own weight is
Correct : B. half
3. A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be
Correct : A. equal to
4. The breaking stress is
Correct : B. less than
5. Modulus of rigidity may be defined as the ratio of
Correct : D. shear stress to shear strain
6. A simply supported beam 'A' of length l, breadth b, and depth d carries a central point load W. Another beam 'B' has the same length and depth but its breadth is doubled. The deflection of beam 'B' will be
Correct : B. one-half
7. The limit of eccentricity for no tensile condition for a column of circular section of diameter
Correct : B. d / 8
8. When a rectangular beam is loaded transversely, the zero stress is developed on the neutral axis.
Correct : A. True
9. For no tension condition in the base of a short column of circular section, the line of action of the load should be within a circle of diameter equal to
Correct : C. one-fourth
10. A pressure vessel is said to be a thick shell, when
Correct : D. the ratio of wall thickness of the vessel to its diameter is greater than 1 / 10
11. A uniformly distributed load may be assumed to behave like a point load at the centre of gravity of the load for all sorts of calculations.
Correct : A. Right
12. A riveted joint may fail by
Correct : D. any one of these
13. A column that fails due to direct strss, is called
Correct : A. short column
14. The ultimate tensile stress for mild steel is
Correct : C. more than
15. A load which acts at a point on a beam is not called uniformly distributed load.
Correct : A. Agree
16. Young's modulus may be defined as the ratio of
Correct : C. linear stress to linear strain
17. The thermal or temperature stress is a function of
Correct : D. all of these
18. A section of beam is said to be in pure bending, if it is subjected to
Correct : C. constant bending moment and zero shear force
19. The rivets are made from ductile material.
Correct : A. Yes
20. When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a
Correct : A. point load at the two points
21. A double strap butt joint with equal straps is
Correct : B. always in double shear
22. The ratio of the largest load in a test to the original cross-sectional area of the test piece is called.
Correct : C. ultimate stress
23. Fatigue test is carried out for
Correct : D. all of the above
24. A spring used to absorb shocks and vibrations is
Correct : C. leaf spring
25. The neutral axis of a beam is subjected to
Correct : A. zero
26. When a bar is cooled to -5?C, it will develop
Correct : C. tensile stress
27. If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is
Correct : C. 0.5
28. In case of an over-reinforced beam, the depth of actual neutral axis is the same as that of the critical neutral axis.
Correct : B. False
29. The bending moment diagram for a cantilever beam loaded with uniformly distributed load will be a parabolic curve.
Correct : A. Correct
30. The strain energy stored in a body, when suddenly loaded, is
Correct : D. four times
31. When a body is subjected to two equal and opposite pushes, as a result of which the body tends to reduce its length, the stress and strain induced is compressive.
Correct : A. True
32. The neutral axis of the cross-section a beam is that axis at which the bending stress is
Correct : A. zero
33. The stress at which the extension of the material takes place more quickly as compared to the increase in load, is called
Correct : B. yield point
34. The Young's modulus of a material is 125 Gpa and Poissons ratio is 0.25. The modulus of rigidity of the material is
Correct : B. 50 GPa
35. Euler's formula holds good only for
Correct : B. long column
36. A beam supported at its both ends is not a simply supported beam.
Correct : B. False
37. The shear force of a cantilever beam of length / carrying a uniformly distributed load of w per unit length is
Correct : D. wl
38. The shear force at the ends of a simply supported beam carrying a uniformly distributed load of w per unit length is
Correct : C. wl / 2 at one end and - wl / 2 at the other end
39. The shear force diagram for a cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is a
Correct : D. parabolic curve
40. In a riveted joint, when the rivets in the adjacent rows are staggered in such a way that every rivet is in the middle of the two rivets of the opposite row, the joint is said to be diamond riveted.
Correct : B. No
41. The Rankine's formula holds good for
Correct : C. both short and long columns
42. The extremeties of any diameter on Mohr's circle represent
Correct : B. normal stresses on planes at 45?
43. The Poisson's ratio for cast iron varies from
Correct : B. 0.25 to 0.33
44. The centre to centre distance, between two consecutive rivets in a row, is called
Correct : B. pitch
45. The load at which the column just buckles, is known as
Correct : D. any one of these
46. In a watch, the spring is used to store strain energy. This energy is released
Correct : B. to run the watch
47. The product of the tangential force acting on the shaft and its distance from the axis of the shaft (i.e. radius of shaft) is known as
Correct : B. twisting moment
48. If the modulus of elasticity of a material is twice its modulus of rigidity, then the Poisson's ratio of the material is equal to zero.
Correct : A. Correct
49. The shear force diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, consists of
Correct : B. two right angled triangles
50. The columns whose slenderness ratio is less than 80, are known as
Correct : A. short column
51. The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is
Correct : A. zero
52. When a beam is subjected to bending moment, the stress at any point is
Correct : B. directly proportional to
53. A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the
Correct : C. neutral axis of the section
54. The planes, which carry no shear stress, are known as principal planes.
Correct : A. True
55. A masonry dam may fail due to
Correct : D. any one of the above
56. A thin cylindrical shell of diameter (d) length (l) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is
Correct : C. pd / 4t
57. The proof resilience is the maximum strain energy which can be stored in a body
Correct : A. Yes
58. A pressure vessel is said to be a thin shell when it is made of thin sheets.
Correct : B. Disagree
59. The distance between the centres of rivets in adjacent rows of zig-zag riveted joint, is called back pitch.
Correct : B. False
60. A cantilever beam is one which is
Correct : B. fixed at one end and free at the other end
61. The buckling load for a given column depends upon
Correct : D. all of the above
62. If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then
Correct : A. the material A is more ductile than material B
63. The springs in brakes and clutches are used to
Correct : A. to apply forces
64. The maximum shear stress is
Correct : C. one-half
65. When a column is subjected to an eccentric load, the stress induced in the column will be
Correct : D. direct and bending stress both
66. In a thick cylindrical shell subjected to an internal pressure (p), the tangential stress is always a tensile stress where as the radial stress is a compressive stress
Correct : A. Correct
67. The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is
Correct : D. wl2 / 2
68. When a rectangular beam is loaded longitudinally, the shear force develops on the top layer.
Correct : B. Disagree
69. A thin cylindrical shell of diameter (d), length (l) and thickness (t) is subjected to an internal pressure (p). The hoop stress in the shell is
Correct : B. pd / 2t
70. A bar of copper and steel form a composite system, which is heated to a temperature of 40?C. The stress induced in the copper bar will be
Correct : B. compressive
71. When one plate overlaps the other and the two plates are riveted together with two rows of rivets, the joint is known as
Correct : B. double riveted lap joint
72. A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be
Correct : D. 1400 MPa
73. A leaf spring is supported at the
Correct : B. centre and loaded at the ends
74. In a simple bending of beams, the stress in the beam varies
Correct : A. linearly
75. The unit of stress in S.I. units is
Correct : D. any one of these
76. In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexure
Correct : D. does not exist
77. When a rectangular beam is loaded transversely, the maximum tensile stress is developed on the
Correct : A. top layer
78. The unit of Young's modulus is same as that of stress.
Correct : A. True
79. The deformation per unit length is called
Correct : D. strain
80. In case of eccentrically loaded struts
Correct : C. composite section
81. The compression test is carried on
Correct : B. brittle
82. The point of contraflexure occurs in
Correct : C. overhanging beams
83. The shear force at a certain point on a beam changes sign form +ve value to -ve value or vice versa. The bending moment at that point will be zero.
Correct : B. False
84. When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is
Correct : D. shear stress, shear strain
85. The formation of the bar per unit length in the direction of the force is known as
Correct : A. linear strain
86. In a beam where shear force changes sign, the bending moment will be
Correct : C. maximum
87. When a change in length takes place, the strain is known as
Correct : A. linear strain
88. The factor of safety is always more than unity.
Correct : A. Correct
89. For long columns, the value of buckling load is
Correct : B. less than
90. The capacity of a strained body for doing work on the removal of the straining force, is called
Correct : B. resilience
91. A body is subjected to a direct tensile stress of 300 Mpa in one plane accompanied by a simple shear stress of 200 Mpa. The maximum normal stress will be
Correct : D. 400 MPa
92. A beam which is fixed at one end and free at the other is called
Correct : D. cantilever beam
93. The product of Young's modulus (E) and moment of inertia (I) is known as
Correct : C. flexural rigidity
94. The unit of modulus of elasticity is same as those of
Correct : D. stress, pressure and modulus of rigidity
95. When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced is
Correct : C. tensile stress, tensile strain
96. The total strain energy stored in a body is termed as
Correct : A. resilience
97. The stiffness of a closely-coiled helical spring is
Correct : B. inversely
98. For biaxial stress, the planes of maximum shear are at right angles to each other and are inclined at 45? to the principal planes.
Correct : A. True
99. The perpendicular distance between the centre lines of the successive rows, is called pitch.
Correct : B. Disagree
100. In a thick cylindrical shell subjected to an internal pressure (p), the maximum radial stress at the inner surface of the shell is