Exercise: Strength Of Materials

Questions for: Strength Of Materials

When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where α = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)
A:
B:
C:
D:
Answer: A
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The maximum deflection of a fixed beam carrying a central point load lies at
A:
fixed ends
B:
centre of beam
C:
l/3 from fixed ends
D:
none of these
Answer: B
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The springs in brakes and clutches are used to
A:
to apply forces
B:
to measure forces
C:
to store strain energy
D:
to absorb shocks
Answer: A
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A beam of uniform strength may be obtained by
A:
keeping the width uniform and varying the depth
B:
keeping the depth uniform and varying the width
C:
varying the width and depth both
D:
any one of the above
Answer: D
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Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 2:5, then the ratio of modulus of elasticity of the two materials will be
A:
2:5
B:
5:2
C:
4:3
D:
3:4
Answer: B
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