If a solid shaft is subjected to a torque T at its end such that maximum shear s

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If a solid shaft is subjected to a torque T at its end such that maximum shear stress does not exceed f_z the diameter of the shaft will be
Options
A.
B.
C.
D. none of these.

Correct Answer

Strength of Materials problems

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2. Euler's formula states that the buckling load P for a column of length l, both ends hinged and whose least moment of inertia and modulus of elasticity of the material of the column are I and E respectively, is given by the relation
Options
A.
B.
C.
D.
E. P = ?El².

5. The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as
Options
A. yield stress
B. longitudinal stress
C. hoop stress
D. circumferential stress
E. ultimate stress.

6. In a square beam loaded longitudinally, shear develops
Options
A. on middle fibre along horizontal plane
B. on lower fibre along horizontal plane
C. on top fibre along vertical plane
D. equally on each fibre along horizontal plane
E. none of these.

7. A member which is subjected to reversible tensile or compressive stress may fail at a stress lower than the ultimate stress of the material. This property of metal, is called
Options
A. plasticity of the metal
B. elasticity of the metal
C. fatigue of the metal
D. workability of the metal.

8. 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
Options
A. zero
B. upward
C. downward
D. none of these.

9. Pick up the correct statement from the following :
Options
A. The distance of the eccentric axial load from the C.G. beyond which tension develops, is known as kern distance
B. In visco-elastic material, stress-strain relation is dependent on time
C. An instropic material has different properties is different directions
D. An orthotropic material has different properties in three mutually perpendicular directions
E. All the above.

10. In a simply supported beam (l + 2a) with equal overhangs (a) and carrying a uniformly distributed load over its entire length, B.M. at the middle point of the beam will be zero if
Options
A. l = 2a
B. l = 4a
C. l < 2a
D. l > a
E. l > 3a.

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