Exercise: Strength Of Materials

Questions for: Strength Of Materials

The section modulus of a rectangular light beam 25 metres long is 12.500 cm3. The beam is simply supported at its ends and carries a longitudinal axial tensile load of 10 tonnes in addition to a point load of 4 tonnes at the centre. The maximum stress in the bottom most fibre at the mid span section, is
A:
13.33 kg/cm2 tensile
B:
13.33 kg/cm2 compressive
C:
26.67 kg/cm2 tensile
D:
26.67 kg/cm2 compressive
Answer: C
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In a shaft rotated by a couple, the shear force varies
A:
from zero at the centre to a maximum at the circumference
B:
from minimum at the centre of maximum at the circumference
C:
from maximum at the centre to zero at the circumference
D:
equally throughout the section
Answer: A
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The moment diagram for a cantilever carrying a concentrated load at its free end, will be
A:
triangle
B:
rectangle
C:
parabola
D:
cubic parabola.
Answer: A
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A cantilever carries is uniformly distributed load W over its whole length and a force W acts at its free end upward. The net deflection of the free end will be
A:
zero
B:
upward
C:
downward
D:
none of these.
Answer: B
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The ratio of the moments of resistance of a solid circular shaft of diameter D and a hollow shaft (external diameter D and internal diameter d), is
A:
B:
C:
D:
Answer: A
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