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MCQs

Total Questions : 1187 | Page 5 of 119 pages
Question 41. A force while acting on a body may
  1.     Change its motion
  2.     Balance the forces, already acting on it
  3.     Give rise to the internal stresses in it
  4.     All of these
 Discuss Question
Answer: Option D. ->  All of these
Question 42. Mass moment of inertia of a thin rod about its one end is ___________ the mass moment of inertia of the same rod about its mid-point
  1.     Same as
  2.     Twice
  3.     Thrice
  4.     Four times
 Discuss Question
Answer: Option D. ->  Four times
Question 43. The force induced in the string ab due to the load w, as shown in the below figure is
  1.     W sinθ
  2.     W cosθ
  3.     W secθ
  4.     W cosecθ
 Discuss Question
Answer: Option D. ->  W cosecθ
Question 44. The velocity of a body on reaching the ground from a height h, is
  1.     2.√(gh)
  2.     √(gh)
  3.     √(2gh)
  4.     2g.√h
 Discuss Question
Answer: Option C. ->  √(2gh)
Question 45. The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.
  1.     Equal to
  2.     Less than
  3.     Greater than
  4.     None of these
 Discuss Question
Answer: Option A. ->  Equal to
Question 46. Angle of friction is the
  1.     Angle between normal reaction and the resultant of normal reaction and the limiting friction
  2.     Ratio of limiting friction and normal reaction
  3.     The ratio of minimum friction force to the friction force acting when the body is just about to move
  4.     The ratio of minimum friction force to friction force acting when the body is in motion
 Discuss Question
Answer: Option A. ->  Angle between normal reaction and the resultant of normal reaction and the limiting friction
Question 47. The below figure shows the two equal forces at right angles acting at a point. the value of force ‘r’ acting along their bisector and in opposite direction is
  1.     P/2
  2.     2P
  3.     √2 × P
  4.     P/√2
 Discuss Question
Answer: Option C. ->  √2 × P
Question 48. The moment of inertia of a square of side (a) about an axis through its center of gravity is
  1.     a4/4
  2.     a4/8
  3.     a4/12
  4.     a4/36
 Discuss Question
Answer: Option C. ->  a4/12
Question 49. The maximum mechanical advantage of a lifting machine is
  1.     1 + m
  2.     1 - m
  3.     1 / m
  4.     m
 Discuss Question
Answer: Option C. ->  1 / m
Question 50. The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by
  1.     ω/r
  2.     ω.r
  3.     ω²/r
  4.     ω².r
 Discuss Question
Answer: Option B. ->  ω.r

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