Strength of Materials Questions and Answers – Strain

This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on “Strain”.

1. The dimension of strain is?
a) LT^-2
b) N/m²
c) N
d) Dimensionless
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2. What is tensile strain?
a) The ratio of change in length to the original length
b) The ratio of original length to the change in length
c) The ratio of tensile force to the change in length
d) The ratio of change in length to the tensile force applied
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3. Find the strain of a brass rod of length 250mm which is subjected to a tensile load of 50kN when the extension of rod is equal to 0.3mm?
a) 0.025
b) 0.0012
c) 0.0046
d) 0.0014
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4. Find the elongation of an steel rod of 100mm length when it is subjected to a tensile strain of 0.005?
a) 0.2mm
b) 0.3mm
c) 0.5mm
d) 0.1mm
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5. A tensile test was conducted on a mild steel bar. The diameter and the gauge length of bat was 3cm and 20cm respectively. The extension was 0.21mm. What is the value to strain?
a) 0.0010
b) 0.00105
c) 0.0105
d) 0.005
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6. i) Strain is a fundamental behaviour of a material.
ii) Strain does not have a unit.
a) Both i and ii are true and ii is the correct explanation of i
b) Both i and ii ate true but ii is not the correct explanation of i
c) i is true but ii is false
d) ii is true but i is false
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7. A tensile test was conducted on a steel bar. The gauge length of the bar was 10cm and the extension was 2mm. What will be the percentage elongation?
a) 0.002
b) 0.02
c) 0.2
d) 2
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8. The lateral strain is ___________
a) The ratio of axial deformation to the original length
b) The ratio of deformation in area to the original area
c) The strain at right angles to the direction of applied load
d) The ratio of length of body to the tensile force applied on it
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9. The unit of force in S.I. units is ?
a) Kilogram
b) Newton
c) Watt
d) Dyne
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10. Which of the following is not the unit of distance?
a) Angstrom
b) Light year
c) Micron
d) Milestone
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11. A solid cube is subjected to equal normal forces on all its faces. The volumetric strain will be x-times the linear strain in any of the three axes when?
a) X=1
b) X=2
c) X=3
d) X=4
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12. A rod 200cm long is subjected to an axial pull due to which it elongates about 2mm. Calculate the amount of strain?
a) 0.001
b) 0.01
c) 0.02
d) 0.002
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13. Some structural members subjected to a long time sustained loads deform progressively with time especially at elevated temperatures. What is such a phenomenon called?
a) Fatigue
b) Creep
c) Creep relaxation
d) Fracture
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14. Find the strain of a brass rod of length 100mm which is subjected to a tensile load of 50kN when the extension of rod is equal to 0.1mm?
a) 0.01
b) 0.001
c) 0.05
d) 0.005
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Sanfoundry Global Education & Learning Series – Strength of Materials.

To practice all areas of Strength of Materials, here is complete set of 1000+ Multiple Choice Questions and Answers.

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