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Strength of Materials
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Question
If the depth of a simply supported beam carrying an isolated load at its centre, is doubled, the deflection of the beam at the centre will be changed by a factor of
Options
A. 2
B. 1/2
C. 8
D. 1/8
E. 4
Correct Answer
1/8
Strength of Materials problems
Search Results
1. Hooke's law states that stress and strain are
Options
A. directly proportional
B. inversely proportional
C. curvilinearly related
D. none of these.
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Correct Answer: directly proportional
2. The equivalent length of a column fixed at one end and free at the other end, is
Options
A. 0.5
l
B. 0.7
l
C.
l
D. 2
l
E. 1.5
l
.
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Correct Answer: 2
l
3. If the length of a cantilever carrying an isolated load at its free end is doubled, the deflection of the free end will increase by
Options
A. 8
B. 1/8
C. 1/3
D. 2
E. 3
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Correct Answer: 8
4. The maximum deflection of
Options
A. a simply supported beam carrying a uniformly increasing load from either end and having the apex at the mid span is
B. a fixed ended beam carrying a distributed load over the span is
C. a fixed ended beam carrying a concentrated load at the mid span is
D. a cantilever beam subjected to a moment
M
at the free end is
E. All the above.
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Correct Answer: All the above.
5. The stress necessary to initiate yielding, is considerably
Options
A. more than that necessary to continue it
B. less than that necessary to continue it
C. more than that necessary to stop it
D. less than that necessary to stop it.
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Correct Answer: more than that necessary to continue it
6. A beam is said to be of uniform strength, if
Options
A. B.M. is same throughout the beam
B. shear stress is same throughout the beam
C. deflection is same throughout the beam
D. bending stress is same at every section along its longitudinal axis.
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Correct Answer: bending stress is same at every section along its longitudinal axis.
7. The equivalent length of a column fixed at both ends, is
Options
A. 0.5
l
B. 0.7
l
C.
l
D. 2
l
E. 1.5
l
.
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Correct Answer: 0.5
l
8. The effect of arching a beam, is
Options
A. to reduce the bending moment throughout
B. to increase the bending moment throughout
C. nothing on the bending throughout
D. ail the above.
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Correct Answer: to reduce the bending moment throughout
9. The moment diagram for a cantilever carrying linearly varying load from zero at its free end and to maximum at the fixed end will be a
Options
A. triangle
B. rectangle
C. parabola
D. cubic parabola.
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Correct Answer: cubic parabola.
10. If a circular beam of diameter
d
experiences a longitudinal strain
and a lateral strain
the volumetric strain is
Options
A.
B.
C.
D.
E. none of these.
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Correct Answer:
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