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MCQs

Total Questions : 1187 | Page 2 of 119 pages
Question 11. The minimum force required to slide a body of weight 'w' on a rough horizontal plane is
  1.     W sinθ
  2.     W cosθ
  3.     W tanθ
  4.     None of these
 Discuss Question
Answer: Option C. ->  W tanθ
Question 12. In actual machines
  1.     Mechanical advantage is greater than velocity ratio
  2.     Mechanical advantage is equal to velocity ratio
  3.     Mechanical advantage is less than velocity ratio
  4.     Mechanical advantage is unity
 Discuss Question
Answer: Option C. ->  Mechanical advantage is less than velocity ratio
Question 13. Which one of the following statements is not correct?
  1.     The tangent of the angle of friction is equal to coefficient of friction
  2.     The angle of repose is equal to angle of friction
  3.     The tangent of the angle of repose is equal to coefficient of friction
  4.     The sine of the angle of repose is equal to coefficient to friction
 Discuss Question
Answer: Option D. ->  The sine of the angle of repose is equal to coefficient to friction
Question 14. Kinetic friction is the
  1.     Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction
  2.     Ratio of limiting friction and normal reaction
  3.     The friction force acting when the body is just about to move
  4.     The friction force acting when the body is in motion
 Discuss Question
Answer: Option D. ->  The friction force acting when the body is in motion
Question 15. On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be
  1.     Towards the wall at its upper end
  2.     Away from the wall at its upper end
  3.     Upwards at its upper end
  4.     Downwards at its upper end
 Discuss Question
Answer: Option C. ->  Upwards at its upper end
Question 16. The maximum acceleration of a particle moving with simple harmonic motion is
  1.     ω
  2.     ωr
  3.     ω²r
  4.     ω/r
 Discuss Question
Answer: Option C. ->  ω²r
Question 17. The centre of percussion of the homogeneous rod of length ‘l’ suspended at the top will be
  1.     L/2
  2.     L/3
  3.     3L/4
  4.     2L/3
 Discuss Question
Answer: Option D. ->  2L/3
Question 18. The units of moment of inertia of mass are
  1.     kg-m²
  2.     m²/kg
  3.     kg/m²
  4.     kg/m
 Discuss Question
Answer: Option A. ->  kg-m²
Question 19. The velocity of a particle moving with simple harmonic motion is _________ at the mean position.
  1.     Zero
  2.     Minimum
  3.     Maximum
  4.     None of these
 Discuss Question
Answer: Option C. ->  Maximum
Question 20. Which of the following is not the unit of distance?
  1.     Angstrom
  2.     Light year
  3.     Micron
  4.     Milestone
 Discuss Question
Answer: Option D. ->  Milestone

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