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MCQs

Total Questions : 1187 | Page 6 of 119 pages
Question 51. A smooth cylinder lying on its convex surface remains in __________ equilibrium.
  1.     Stable
  2.     Unstable
  3.     Neutral
  4.     None of these
 Discuss Question
Answer: Option B. ->  Unstable
Question 52. Coefficient of friction depends upon
  1.     Area of contact only
  2.     Nature of surface only
  3.     Both (A) and (B)
  4.     None of these
 Discuss Question
Answer: Option B. ->  Nature of surface only
Question 53. Pick up the incorrect statement from the following:
  1.     The C.G. of a circle is at its centre
  2.     The C.G. of a triangle is at the intersection of its medians
  3.     The C.G. of a rectangle is at the intersection of its diagonals
  4.     The C.G. of a semicircle is at a distance of r/2 from the centre
 Discuss Question
Answer: Option D. ->  The C.G. of a semicircle is at a distance of r/2 from the centre
Question 54. For a self locking machine, the efficiency must be
  1.     Equal to 50%
  2.     Less than 50%
  3.     Greater than 50%
  4.     100%
 Discuss Question
Answer: Option B. ->  Less than 50%
Question 55. Non-coplanar non-concurrent forces are those forces which
  1.     Meet at one point, but their lines of action do not lie on the same plane
  2.     Do not meet at one point and their lines of action do not lie on the same plane
  3.     Do not meet at one point but their lines of action lie on the same plane
  4.     None of the above
 Discuss Question
Answer: Option B. ->  Do not meet at one point and their lines of action do not lie on the same plane
Question 56. Coplanar concurrent forces are those forces which
  1.     Meet at one point, but their lines of action do not lie on the same plane
  2.     Do not meet at one point and their lines of action do not lie on the same plane
  3.     Meet at one point and their lines of action also lie on the same plane
  4.     Do not meet at one point, but their lines of action lie on the same plane
 Discuss Question
Answer: Option C. ->  Meet at one point and their lines of action also lie on the same plane
Question 57. The coefficient of friction depends upon
  1.     Nature of surfaces
  2.     Area of contact
  3.     Shape of the surfaces
  4.     All of the above
 Discuss Question
Answer: Option A. ->  Nature of surfaces
Question 58. The energy possessed by a body, for doing work by virtue of its position, is called
  1.     Potential energy
  2.     Kinetic energy
  3.     Electrical energy
  4.     Chemical energy
 Discuss Question
Answer: Option A. ->  Potential energy
Question 59. According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. ip) is given by(where, a = area of the section, ig = moment of inertia of the section about an axis passing through its c.g., and h = distance between c.g. and the parallel axis.)
  1.     IP = IG + Ah2
  2.     IP = IG - Ah2
  3.     IP = IG / Ah2
  4.     IP = Ah2 / IG
 Discuss Question
Answer: Option A. ->  IP = IG + Ah2
Question 60. Centre 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

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