Strength of Materials Questions and Solutions pdf - Set 15 - ObjectiveBooks
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# Practice Test: Question Set - 15

1. Shear force for a cantilever carrying a uniformly distributed load over its length, is
(A) Triangle
(B) Rectangle
(C) Parabola
(D) Cubic parabola

2. The weight of a body is due to
(A) Centripetal force of earth
(B) Gravitational pull exerted by the earth
(C) Forces experienced by body in atmosphere
(D) Gravitational force of attraction towards the centre of the earth

3. For structural analysis of forces, the method refers to
(A) Moment-area-theorem
(B) Three-moment equation
(C) Maxwell's reciprocal theorem
(D) None of these

4. The section modulus of a rectangular section is proportional to
(A) Area of the section
(B) Square of the area of the section
(C) Product of the area and depth
(D) Product of the area and width

5. Pick up the incorrect statement from the following:
(A) The C.G. of a circle is at its center
(B) The C.G. of a triangle is at the intersection of its medians
(C) The C.G. of a rectangle is at the intersection of its diagonals
(D) The C.G. of a semicircle is at a distance of r/2 from the center

6. According to Unwin's formula, the diameter ‘d’ of a rivet of plate of thickness ‘t’ is :
(A) d = 6.05 √t
(B) d = 1.5 t + 4
(C) d = √5 t
(D) d = √t + 1.5

7. For a beam having fixed ends, the unknown element of the reactions, is
(A) Horizontal components at either end
(B) Vertical components at either end
(C) Horizontal component at one end and vertical component at the other
(D) Horizontal and vertical components at both the ends

8. If a rigid body is in equilibrium under the action of three forces, then
(A) These forces are equal
(B) The lines of action of these forces meet in a point
(C) The lines of action of these forces are parallel
(D) Both (B) and (C) above

9. The materials which have the same elastic properties in all directions, are called
(A) Isotropic
(B) Brittle
(C) Homogeneous
(D) Hard

10. A solid circular shaft of diameter d is subjected to a torque T. The maximum normal stress induced in the shaft, is
(A) Zero
(B) 16T/πd3
(C) 32T/πd3
(D) None of these

11. Frictional force encountered after commencement of motion is called
(A) Post friction
(B) Limiting friction
(C) Kinematic friction
(D) Dynamic friction

12. A three-hinged arch is said to be:
(A) Statically determinate structure
(B) Statically indeterminate structure
(C) A bent beam
(D) None of these

13. The areas of cross-section of a square beam and a circular beam subjected to equal bending moments, are same.
(A) Circular beam is more economical
(B) Square beam is more economical
(C) Both the beams are equally strong
(D) Both the beams are equally economical

14. A single force and a couple acting in the same plane upon a rigid body
(A) Balance each other
(B) Cannot balance each other
(C) Produce moment of a couple
(D) Are equivalent

15. If the shear force along a section of a beam is zero, the bending moment at the section is
(A) Zero
(B) Maximum
(C) Minimum
(D) Average of maximum-minimum

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