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Mechanical Engineering :: Engineering Mechanics

  1. 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.)

  2. A.

    IP = IG + Ah2

    B.

    IP = IG - Ah2

    C.

    IP = IG / Ah2

    D.

    IP = Ah2 / IG


  3. The resultant of two equal forces P making an angle θ, is given by

  4. A.

    P sin θ /2

    B.

    P cos θ /2

    C.

    P tan θ /2

    D.

    P cot θ /2


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

  6. A.

    impulsive force

    B.

    mass

    C.

    weight

    D.

    momentum


  7. Coplaner concurrent forces are those forces which

  8. A.

    meet at one point, but their lines of action do not lie on the same plane

    B.

    do not meet at one point and their lines of action do not lie on the same plane

    C.

    meet at one point and their lines of action also lie on the same plane

    D.

    do not meet at one point, but their lines of action lie on the same plane


  9. The power developed by a body acted upon by a torque T newton metre (N - m) and revolving at ω radian/s is given by

  10. A.

    T.ω (in watts)

    B.

    T.ω/60 (in watts)

    C.

    T.ω/75 (in kilowatts)

    D.

    T.ω/4500 (in kilowatts)