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MCQs

Total Questions : 735 | Page 2 of 74 pages
Question 11. Frictional force encountered after commencement of motion is called
  1.    post friction
  2.    limiting friction
  3.    frictional resistance
  4.    dynamic friction.
 Discuss Question
Answer: Option D. -> dynamic friction.
Question 12. The resultant of the following three couples 20 kg force, 0.5 m arm, + ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be
  1.    20 kg, – ve sense
  2.    20 kg, + ve sense
  3.    10 kg, + ve sense
  4.    10 kg, – ve sense
 Discuss Question
Answer: Option A. -> 20 kg, – ve sense
Question 13. Center of percussion is
  1.    the point of C.G.
  2.    the point of metacentre
  3.    the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
  4.    point of suspension
 Discuss Question
Answer: Option C. -> the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
Question 14. Two coplanar couples having equal and opposite moments
  1.    Balance each other
  2.    Produce a couple and an unbalanced force
  3.    Are equivalent
  4.    Produce a moment of couple
 Discuss Question
Answer: Option D. -> Produce a moment of couple
Question 15. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of
  1.    forces
  2.    independence of forces
  3.    balance of force
  4.    resolution of forces.
 Discuss Question
Answer: Option D. -> resolution of forces.
Question 16. The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are
  1.    2 and V6
  2.    3 and 1 kg
  3.    V5 and V5
  4.    2 and 5
 Discuss Question
Answer: Option C. -> V5 and V5
Question 17. If three forces acting in different planes can be represented by a triangle, these will be in
  1.    non-equilibrium
  2.    partial equilibrium
  3.    full equilibrium
  4.    unpredictable
 Discuss Question
Answer: Option A. -> non-equilibrium
Question 18. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either
  1.    meet in a point
  2.    be all parallel
  3.    at least two of them must meet
  4.    all the above are correct
 Discuss Question
Answer: Option D. -> all the above are correct
Question 19. 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
  1.    Two members with unknown forces of the frame
  2.    Three members with unknown forces of the frame
  3.    Four members with unknown forces of the frame
  4.    Three members with known forces of the frame
 Discuss Question
Answer: Option B. -> Three members with unknown forces of the frame
Question 20. Which of the following is not a scalar quantity
  1.    mass
  2.    volume
  3.    density
  4.    acceleration.
 Discuss Question
Answer: Option D. -> acceleration.

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