Civil Engineering Strength of Materials MCQ Test - Set 01

Practice Test: Question Set - 01


1. According to Lami's theorem
    (A) Three forces acting at a point will be in equilibrium
    (B) Three forces acting at a point can be represented by a triangle, each side being proportional to force
    (C) If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
    (D) If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

2. A number of forces acting at a point will be in equilibrium if
    (A) Their total sum is zero
    (B) Two resolved parts in two directions at right angles are equal
    (C) Sum of resolved parts in any two perpendicular directions are both zero
    (D) All of them are inclined equally

3. The center of gravity of a triangle lies at the point of
    (A) Concurrence of the medians
    (B) Intersection of its altitudes
    (C) Intersection of bisector of angles
    (D) Intersection of diagonals

4. Angle of friction is the
    (A) Angle between normal reaction and the resultant of normal reaction and the limiting friction
    (B) Ratio of limiting friction and normal reaction
    (C) The ratio of minimum friction force to the friction force acting when the body is just about to move
    (D) The ratio of minimum friction force to friction force acting when the body is in motion

5. Limiting force of friction is the
    (A) Tangent of angle between normal reaction and the resultant of normal reaction and limiting friction
    (B) Ratio of limiting friction and normal reaction
    (C) The friction force acting when the body is just about to move
    (D) The friction force acting when the body is in motion

6. The necessary condition for forces to be in equilibrium is that these should be
    (A) Coplanar
    (B) Meet at one point
    (C) Both (A) and (B) above
    (D) All be equal

7. Which of the following is the example of lever of first order?
    (A) Arm of man
    (B) Pair of scissors
    (C) Pair of clinical tongs
    (D) All of the above

8. A cable with a uniformly distributed load per horizontal metre run will take the following shape
    (A) Straight line
    (B) Parabola
    (C) Hyperbola
    (D) Elliptical

9. In determining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than
    (A) Two members with unknown forces of the frame
    (B) Three members with unknown forces of the frame
    (C) Four members with unknown forces of the frame
    (D) Three members with known forces of the frame

10. According to principle of transmissibility of forces, the effect of a force upon a body is
    (A) Maximum when it acts at the center of gravity of a body
    (B) Different at different points in its line of action
    (C) The same at every point in its line of action
    (D) Minimum when it acts at the C.G. of the body

11. Which of the following do not have identical dimensions?
    (A) Momentum and impulse
    (B) Torque and energy
    (C) Torque and work
    (D) Moment of a force and angular momentum

12. If a number of forces act simultaneously on a particle, it is possible
    (A) Not a replace them by a single force
    (B) To replace them by a single force
    (C) To replace them by a single force through C.G.
    (D) To replace them by a couple

13. Two coplanar couples having equal and opposite moments
    (A) Balance each other
    (B) Produce a couple and an unbalanced force
    (C) Are equivalent
    (D) Produce a moment of couple

14. If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be
    (A) Maximum
    (B) Minimum
    (C) Zero
    (D) Infinity

15. Kinetic friction is the
    (A) Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction
    (B) Ratio of limiting friction and normal reaction
    (C) The friction force acting when the body is just about to move
    (D) The friction force acting when the body is in motion

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