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Engineering Mechanics problems

  • 1. The force, by which the body is attracted, towards the centre of the earth, is called

  • Options
  • A. impulsive force
  • B. mass
  • C. weight
  • D. momentum
    • Discuss
  • 2. The velocity ratio for the second system of pulleys is n.

  • Options
  • A. True
  • B. False
    • Discuss
  • 3. Efficiency of a screw jack is given by(where ? = Helix angle, and ? = Angle of friction.)

  • Options
  • A.
  • B.
  • C.
  • D.
    • Discuss
  • 4. The velocity ratio of a first system of pulleys with 4 pulleys is

  • Options
  • A. 4
  • B. 8
  • C. 16
  • D. 20
    • Discuss
  • 5. According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre 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.)

  • Options
  • A. IP = IG + Ah2
  • B. IP = IG - Ah2
  • C. IP = IG / Ah2
  • D. IP = Ah2 / IG
    • Discuss
  • 6. The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

  • Options
  • A. mr2/3
  • B. 2mr2/3
  • C. 2mr2/5
  • D. 3mr2/5
    • Discuss
  • 7. The linear velocity of a body rotating at ? rad / s along a circular path of radius r is given by

  • Options
  • A. ?/r
  • B. ?.r
  • C. ?2/r
  • D. ?2.r
    • Discuss
  • 8. The ideal angle of banking provided on the curves on roads depends upon

  • Options
  • A. weight of the vehicle
  • B. (velocity)2 of the vehicle
  • C. nature of the road surface
  • D. coefficient of friction between the road and vehicle contact point
    • Discuss
  • 9. The time taken by a particle for one complete oscillation is known as periodic time.

  • Options
  • A. Agree
  • B. Disagree
    • Discuss
  • 10. The power developed by a body acted upon by a torque T newton metre (N - m) and revolving at ? radian/s is given by

  • Options
  • A. T.? (in watts)
  • B. T.?/60 (in watts)
  • C. T.?/75 (in kilowatts)
  • D. T.?/4500 (in kilowatts)
    • Discuss

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