Practice Test: Question Set - 06
1. When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring (δ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)
- (A) WD3n/Cd⁴
- (B) 2WD3n/Cd⁴
- (C) 4WD3n/Cd⁴
- (D) 8WD3n/Cd⁴
2. Percentage reduction of area in performing tensile test on cast iron may be of the order of
- (A) 50%
- (B) 25%
- (C) 0%
- (D) 15%
3. For the beam shown in the below figure, the shear force diagram between A and B is
- (A) A
horizontal line
- (B) A
vertical line
- (C) An
inclined line
- (D) A
parabolic curve
4. When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy), the maximum normal stress is
- (A) (σx/2) +
(1/2) × √(σx² + 4 τ²xy)
- (B) (σx/2) - (1/2) × √(σx² +
4 τ²xy)
- (C) (σx/2) + (1/2) × √(σx² - 4 τ²xy)
- (D) (1/2) × √(σx² + 4 τ²xy)
5. The materials which exhibit the same elastic properties in all directions are called
- (A) Homogeneous
- (B) Inelastic
- (C) Isotropic
- (D) Isentropic
6. Modulus of rigidity may be defined as the ratio of
- (A) Linear
stress to lateral strain
- (B) Lateral
strain to linear strain
- (C) Linear
stress to linear strain
- (D) Shear
stress to shear strain
7. The ratio of lateral strain to the linear strain within elastic limit is known as
- (A) Young's modulus
- (B) Bulk modulus
- (C) Modulus of rigidity
- (D) Poisson's ratio
8. In the below figure, the plastic range occurs
- (A) Before point
A
- (B) Beyond
point A
- (C) Between
points A and D
- (D) Between
points D and E
9. Shear modulus is the ratio of
- (A) Linear
stress to linear strain
- (B) Linear
stress to lateral strain
- (C) Volumetric
strain to linear strain
- (D) Shear
stress to shear strain
10. The ratio of elongation in a prismatic bar due to its own weight (W) as compared to another similar bar carrying an additional weight (W) will be
- (A) 1 : 2
- (B) 1 : 3
- (C) 1 : 4
- (D) 1 : 2.5
11. The weakest section of a diamond riveting is the section which passes through
- (A) The first row
- (B) The second row
- (C) The central row
- (D) One rivet hole of the
end row
12. The shear force diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, consists of
- (A) One
right angled triangle
- (B) Two
right angled triangles
- (C) One
equilateral triangle
- (D) Two
equilateral triangles
13. Hooke's law holds good up to
- (A) Yield point
- (B) Limit of
proportionality
- (C) Breaking point
- (D) Elastic limit
14. Which of the following statement is correct?
- (A) The
stress is the pressure per unit area
- (B) The
strain is expressed in mm
- (C) Hook's
law holds good up to the breaking point
- (D) Stress
is directly proportional to strain within elastic limit
15. The property of a material which allows it to be drawn into a smaller section is called
- (A) Plasticity
- (B) Ductility
- (C) Elasticity
- (D) Malleability
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