In a beam where shear force changes sign, the bending moment will be zero minimu

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Question
In a beam where shear force changes sign, the bending moment will be
Options
A. zero
B. minimum
C. maximum
D. infinity

Correct Answer

maximum

Strength of Materials problems

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2. If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then
Options
A. the material A is more ductile than material B
B. the material B is more ductile than material A
C. the ductility of material A and B is equal
D. the material A is brittle and material B is ductile

3. The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (?_x and ?_y) acting at a body across two mutually perpendicular planes. The normal stress on an oblique section making an angle ? with the minor principle plane is given by
Options
A. OC
B. OP
C. OQ
D. PQ

4. The strain energy stored in a spring, when subjected to maximum load, without suffering permanent distortion, is known as
Options
A. impact energy
B. proof resilience
C. proof stress
D. modulus of resilience

6. When a thin cylindrical shell is subjected to an internal pressure, there will be
Options
A. a decrease in diameter and length of the shell
B. an increase in diameter and decrease in length of the shell
C. a decrease in diameter and increase in length of the shell
D. an increase in diameter and length of the shell

7. The rectangular beam 'A' has length l, width b and depth d. Another beam 'B' has the same length and width but depth is double that of 'A'. The elastic strength of beam B will be __________ as compared to beam A.
Options
A. same
B. double
C. four times
D. six times

9. When the shear force diagram is a parabolic curve between two points, it indicates that there is a
Options
A. point load at the two points
B. no loading between the two points
C. uniformly distributed load between the two points
D. uniformly varying load between the two points

10. The bending moment of a cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is __________ at the fixed end.
Options
A. wl/2
B. wl
C. wl²/2
D. wl²/6

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