Strength of Materials - Mechanical Engineering Questions - Set 16 - ObjectiveBooks

# Practice Test: Question Set - 16

1. In the below figure, __________ represents glass.

(A) Curve A
(B) Curve B
(C) Curve C
(D) Curve D

2. Hook's law holds good up to
(A) Yield point
(B) Elastic limit
(C) Plastic limit
(D) Breaking point

3. A thin spherical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The stress in the shell material is
(A) pd/t
(B) pd/2t
(C) pd/4t
(D) pd/8t

4. Poisson's ratio is defined as the ratio of
(A) Longitudinal stress and longitudinal strain
(B) Longitudinal stress and lateral stress
(C) Lateral stress and longitudinal stress
(D) Lateral stress and lateral strain

5. The rectangular beam 'A' has length l, width b and depth d. Another beam 'B' has the same length and width but depth is double that of 'A'. The elastic strength of beam B will be __________ as compared to beam A.
(A) Same
(B) Double
(C) Four times
(D) Six times

6. The value of Poisson's ratio for cast iron is
(A) 0.1 to 0.2
(B) 0.23 to 0.27
(C) 0.25 to 0.33
(D) 0.4 to 0.6

7. According to Euler's column theory, the crippling load of a column is given by p = π²EI/Cl². In the Euler's formula, the value of C for a column with one end fixed and the other end free, is
(A) 1/2
(B) 1
(C) 2
(D) 4

8. The elasticity of various materials is controlled by its
(A) Ultimate tensile stress
(B) Proof stress
(C) Stress at yield point
(D) Stress at elastic limit

9. A simply supported beam of length ‘l’ carries a point load ‘W’ at a point C as shown in the below figure. The maximum deflection lies at

(A) Point A
(B) Point B
(C) Point C
(D) Between points B and C

10. The shear force diagram for a cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is a
(A) Horizontal straight line
(B) Vertical straight line
(C) Inclined line
(D) Parabolic curve

11. The maximum shear stress in a thin cylindrical shell subjected to internal pressure 'p' is
(A) pd/t
(B) pd/2t
(C) pd/4t
(D) pd/8t

12. When a beam is subjected to bending moment, the stress at any point is __________ the distance of the point from the neutral axis.
(A) Equal to
(B) Directly proportional to
(C) Inversely proportional to
(D) Independent of

13. In a tensile test, when the material is stressed beyond elastic limit, the tensile strain __________ as compared to the stress.
(A) Decreases slowly
(B) Increases slowly
(C) Decreases more quickly
(D) Increases more quickly

14. A fixed beam is one which is fixed at _________.
(A) One of its ends
(B) Both of its ends
(C) The middle
(D) None of these

15. If the modulus of elasticity for a given material is twice its modulus of rigidity, then bulk modulus is equal to
(A) 2C
(B) 3C
(C) 2C/3
(D) 3C/2

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