Practice Test: Question Set - 17
1. When a load on the free end of a cantilever beam is increased, failure will occur
- (A) At the free
end
- (B) At the fixed
end
- (C) In the
middle of the beam
- (D) At a
distance 2l/3 from free end
2. The rectangular beam 'A ' has length l, width b and depth d. Another beam 'B' has the same width and depth but length is double that of 'A'. The elastic strength of beam 'B' will be __________ as compared to beam A.
- (A) Same
- (B) One-half
- (C) One-fourth
- (D) One-eighth
3. In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, l = Span of the spring, n = Number of plates, b = Width of plates, and t = Thickness of plates)
- (A) Wl/nbt²
- (B) 3Wl/2nbt²
- (C) 2Wl/nbt²
- (D) 3Wl/nbt²
4. The extension of a circular bar tapering uniformly from diameter d₁ at one end to diameter d₂ at the other end, and subjected to an axial pull of P is _________ the extension of a circular bar of diameter d₁ d₂ subjected to the same load P.
- (A) Equal to
- (B) Less than
- (C) Greater than
- (D) None of
these
5. In a thick cylindrical shell subjected to an internal pressure (p), the radial stress across the thickness of the cylinder is
- (A) Maximum
at the outer surface and minimum at the inner surface
- (B) Maximum
at the inner surface and minimum at the outer surface
- (C) Maximum
at the outer surface and zero at the inner surface
- (D) Maximum
at the inner surface arid zero at the outer surface
6. A column with maximum equivalent length has
- (A) Both ends
hinged
- (B) Both
ends fixed
- (C) One end
fixed and the other end hinged
- (D) One end
fixed and the other end free
7. The ratio of change in volume to the original volume is called
- (A) Linear
strain
- (B) Lateral
strain
- (C) Volumetric
strain
- (D) Poisson's
ratio
8. Which of the following statement is wrong?
- (A) In the
theory of simple bending, the assumption is that the plane sections before
bending remains plane after bending.
- (B) In a beam
subjected to bending moment, the strain is directly proportional to the
distance from the neutral axis.
- (C) At the
neutral axis of a beam, the bending stress is maximum.
- (D) The bending
stress in a beam is inversely proportional to the section modulus.
9. The polar moment of inertia of a solid circular shaft of diameter (D) is
- (A) πD³/16
- (B) πD³/32
- (C) πD⁴/32
- (D) πD⁴/64
10. In Mohr's circle, the center of circle from Y-axis is taken as
- (A) (σx - σy)/2
- (B) (σx + σy)/2
- (C) [(σx - σy)/2] +
τ
- (D) [(σx + σy)/2] + τ
11. Shear strength of the welded joint for double parallel fillet is (where τ = Allowable shear stress for weld metal)
- (A) 0.5 s.l.τ
- (B) s.l.τ
- (C) √2 s.l.τ
- (D) 2.s.l.τ
12. When a shaft, is subjected to torsion, the shear stress induced in the shaft varies from
- (A) Minimum at
the center to maximum at the circumference
- (B) Maximum at
the center to minimum at the circumference
- (C) Zero at the
center to maximum at the circumference
- (D) Maximum
at the center to zero at the circumference
13. The strain energy stored in a body, when the load is gradually applied, is (where σ = Stress in the material of the body, V = Volume of the body, and E = Modulus of elasticity of the material)
- (A) σE/V
- (B) σV/E
- (C) σ²E/2V
- (D) σ²V/2E
14. At the neutral axis of a beam, the shear stress is
- (A) Zero
- (B) Minimum
- (C) Maximum
- (D) Infinity
15. In a stress-strain diagram for mild steel, as shown in the below figure, the point ‘A’ represents
- (A) Elastic
limit
- (B) Upper
yield point
- (C) Lower yield
point
- (D) Breaking
point
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