71. A column is said to be a short column, when
its length is very small
its cross-sectional area is small
the ratio of its length to the least radhis of gyration is less than 80.
the ratio of its lengt
✅ The correct answer is option C.
Strength of Materials MCQs
73. In the below figure, Hook’s law holds good, for the portion from O to A.
Agree
Disagree
✅ The correct answer is option A.
74. A simply supported beam with a gradually varying load from zero at B and w per unit length at A is shown in the below figure. The shear force at B is equal to
wl/6
wl/3
wl
2 wl/3
✅ The correct answer is option A.
75. The maximum bending moment of a simply supported beam of span l and carrying a point load W at the centre of beam, is
Wl/4
Wl/2
Wl
Wl2/4
✅ The correct answer is option A.
76. The design of thin cylindrical shells is based on
hoop stress
longitudinal stress
arithmetic mean of the hoop and the longitudinal stress
geometric mean of the
✅ The correct answer is option A.
77. The springs in cars are used to store strain energy.
Correct
Incorrect
✅ The correct answer is option B.
79. A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission’s ratio of the bar in tension will be __________ the Poisson’s ratio for the bar in compression.
equal to
less than
greater than
✅ The correct answer is option A.
80. Shear modulus is the ratio of
linear stress to linear strain
linear stress to lateral strain
volumetric strain to linear strain
shear stress to shear
✅ The correct answer is option D.