A bar of length L metres extends by l mm under a tensile force of P. The strain

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Question
A bar of length L metres extends by l mm under a tensile force of P. The strain produced in the bar is
Options
A. l/L
B. 0.1 l/L
C. 0.01 l/L
D. 0.001 l/L

Correct Answer

0.001 l/L

Strength of Materials problems

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1. A beam of uniform strength may be obtained by
Options
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

2. When one plate overlaps the other and the two plates are riveted together with two rows of rivets, the joint is known as
Options
A. single riveted lap joint
B. double riveted lap joint
C. double riveted single cover butt joint
D. double riveted double cover butt joint

5. According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end free is __________ the crippling load for a similar column hinged at both the ends.
Options
A. equal to
B. less than
C. more than

7. 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 minimum normal stress will be
Options
A. 400 MPa
B. 500 MPa
C. 900 MPa
D. 1400 MPa

8. 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 ? = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)
Options
A.
B.
C.
D.

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