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Civil Engineering
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Strength of Materials
Comments
Question
If the stress produced by a prismatic bar is equal to the working stress, the area of the cross-section of the prismatic bar, becomes
Options
A. zero
B. infinite
C. maximum
D. minimum.
Correct Answer
infinite
Strength of Materials problems
Search Results
1. If the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed by
Options
A. 2 times
B. 4 times
C. 8 times
D. 1/2 times
E. 3 times.
Show Answer
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Discuss
Correct Answer: 8 times
2. The bending moment is maximum on a section where shearing force
Options
A. is maximum
B. is minimum
C. is equal
D. changes sign.
Show Answer
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Discuss
Correct Answer: changes sign.
3. Every material obeys the Hooke's law within its
Options
A. elastic limit
B. plastic point
C. limit of proportionality
D. none of these.
Show Answer
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Correct Answer: limit of proportionality
4. As the elastic limit reaches, tensile strain
Options
A. increases more rapidly
B. decreases more rapidly
C. increases in proportion to the stress
D. decreases in proportion to the stress.
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Correct Answer: increases more rapidly
5. If a steel rod of 20 mm diameter and 5 metres long elongates by 2.275 mm when subjected to an axial pull of 3000 kg, the stress developed, is
Options
A. 9.5541 kg/cm
2
B. 95.541 kg/cm
2
C. 955.41 kg/cm
2
D. 9554.1 kg/cm
2
.
Show Answer
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Correct Answer: 955.41 kg/cm
2
6. The following assumption is not true in the theory of pure torsion :
Options
A. The twist along the shaft is uniform
B. The shaft is of uniform circular section throughout
C. Cross-section of the shaft, which is plane before twist remains plane after twist
D. All radii get twisted due to torsion.
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Correct Answer: All radii get twisted due to torsion.
7. Pick up the correct statement from the following :
Options
A. The rate of change of bending moment is equal to rate of shear force
B. The rate of change of shear force is equal to rate of loading
C. neither (a) nor (b)
D. both (a) and (b).
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Correct Answer: both (a) and (b).
8. If the beam is supported so that there are only three unknown reactive elements at the supports. These can be determined by using the following fundamental equation of statics
Options
A. ?
H
= 0
B. ?
V
= 0
C. ?
H
= 0; ?
H
= 0
D. ?
H
= 0; ?
V
= 0; ?
M
= 0
E. ?
M
= 0; ?
H
= 0
Show Answer
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Correct Answer: ?
H
= 0; ?
V
= 0; ?
M
= 0
9. In a continuous bending moment curve the point where it changes sign, is called
Options
A. point of inflexion
B. point of contraflexture
C. point of virtual hinge
D. all the above.
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Correct Answer: all the above.
10. The property by which a body returns to its original shape after removal of the force, is called
Options
A. plasticity
B. elasticity
C. ductility
D. malleability.
Show Answer
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Correct Answer: elasticity
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