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MCQs

Total Questions : 1187 | Page 3 of 119 pages
Question 21. When a body falls freely under gravitational force, it possesses __________ weight.
  1.     No
  2.     Minimum
  3.     Maximum
  4.     None of these
 Discuss Question
Answer: Option A. ->  No
Question 22. The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is
  1.     3mr²/5
  2.     3mr²/10
  3.     2mr²/5
  4.     4mr²/5
 Discuss Question
Answer: Option B. ->  3mr²/10
Question 23. If the body falls freely under gravity, then the gravitational acceleration is taken as
  1.     +8.9 m/s2
  2.     -8.9 m/s2
  3.     +9.8 m/s2
  4.     -9.8 m/s2
 Discuss Question
Answer: Option C. ->  +9.8 m/s2
Question 24. The moment of a force
  1.     Is the turning effect produced by a force, on the body, on which it acts
  2.     Is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force
  3.     Is equal to twice the area of the triangle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken
  4.     All of the above
 Discuss Question
Answer: Option D. ->  All of the above
Question 25. The resultant of two forces p and q (such that p > q) acting along the same straight line, but in opposite direction, is given by
  1.     P + Q
  2.     P - Q
  3.     P / Q
  4.     Q / P
 Discuss Question
Answer: Option B. ->  P - Q
Question 26. The forces which meet at one point, but their lines of action __________ on the same plane, are known as non-coplanar concurrent forces.
  1.     Lie
  2.     Do not lie
  3.     Either A or B
  4.     None of these
 Discuss Question
Answer: Option B. ->  Do not lie
Question 27. Work done is said to be zero, when
  1.     Some force acts on a body, but displacement is zero
  2.     No force acts on a body but some displacement takes place
  3.     Either (A) or (B)
  4.     None of the above
 Discuss Question
Answer: Option C. ->  Either (A) or (B)
Question 28. According to principle of transmissibility of forces, the effect of a force upon a body is
  1.     maximum when it acts at the center of gravity of a body
  2.     different at different points in its line of action
  3.     the same at every point in its line of action
  4.     minimum when it acts at the C.G. of the body
 Discuss Question
Answer: Option C. ->  the same at every point in its line of action
Question 29. The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad/s2, is
  1.     a = α/ r
  2.     a = α.r
  3.     a = r / α
  4.     None of these
 Discuss Question
Answer: Option B. ->  a = α.r
Question 30. The resultant of two equal forces ‘p’ making an angle ‘θ’, is given by
  1.     2P sinθ/2
  2.     2P cosθ/2
  3.     2P tanθ/2
  4.     2P cotθ/2
 Discuss Question
Answer: Option B. ->  2P cosθ/2

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