51. Gradually applied static loads do not change with time their
52. The yield moment of a cross section is defined as the moment that will just produce the yield stress in
53. Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as
54. At yield point of a test piece, the material
55. The load on a spring per unit deflection, is called
56. A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is
57. A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm2 is:
58. For beams of uniform strength, if depth is constant,
59. A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised
60. A compound bar consists of two bars of equal length. Steel bar cross-section is 3500 mm2 and that of brass bar is 3000 mm2. These are subjected to a compressive load 1,00,000 N. If Eb = 0.2 MN/mm2 and Eb = 0.1 MN/mm2, the stresses developed are:
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