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MCQs

Total Questions : 1033 | Page 8 of 104 pages
Question 71. The center of gravity of a uniform lamina lies at
  1.     the center of heavy portion
  2.     the bottom surface
  3.     the mid point of its axis
  4.     all of the above
 Discuss Question
Answer: Option C. ->  the mid point of its axis
Question 72. Dynamic friction as compared to static friction is
  1.     same
  2.     more
  3.     less
  4.     may be less of more depending on nature of surfaces and velocity
 Discuss Question
Answer: Option C. ->  less
Question 73. The necessary condition for forces to be in equilibrium is that these should be
  1.     Coplanar
  2.     Meet at one point
  3.     Both (A) and (B) above
  4.     All be equal
 Discuss Question
Answer: Option C. ->  Both (A) and (B) above
Question 74. The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be
  1.     r/2
  2.     2r/3
  3.     r/A
  4.     3r/2
 Discuss Question
Answer: Option D. ->  3r/2
Question 75. Center of gravity of a solid cone lies on the axis at the height
  1.     one-fourth of the total height above base
  2.     one-third of the total height above base
  3.     one-half of the total height above base
  4.     three-eighth of the total height above the base
 Discuss Question
Answer: Option A. ->  one-fourth of the total height above base
Question 76. Least force required to draw a body up the inclined plane is w sin (plane inclination + friction angle) applied in the direction
  1.     along the plane
  2.     horizontally
  3.     vertically
  4.     at an angle equal to the angle of friction to the inclined plane
 Discuss Question
Answer: Option D. ->  at an angle equal to the angle of friction to the inclined plane
Question 77. The unit of power in s.i. units is
  1.     newton meter
  2.     watt
  3.     joule
  4.     kilogram meter/sec.
 Discuss Question
Answer: Option B. ->  watt
Question 78. 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 79. 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 80. 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.

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