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Mechanical Engineering :: Engineering Mechanics

  1. Moment of inertia of a hollow rectangular section as shown in the below figure about X-X axis, is

  2. A.

    \(\frac { BD^3 } { 12 } - \frac { bd^3 } { 12 }\)

    B.

    \(\frac { DB^3 } { 12 } - \frac { db^3 } { 12 }\)

    C.

    \(\frac { BD^3 } { 36 } - \frac { bd^3 } { 36 }\)

    D.

    \(\frac { DB^3 } { 36 } - \frac { db^3 } { 36 }\)


  3. Two equal and opposite parallel forces whose lines of action are different, can be replaced by a single force parallel to the given forces.

  4. A.

    Correct

    B.

    Incorrect


  5. All the steel trusses of the bridges, have one of their end roller supported, and other end hinged. The main advantage of such a support is that the truss remains stable.

  6. A.

    True

    B.

    False


  7. The time of flight of a projectile on downward inclined plane depends upon

  8. A.

    angle of projection

    B.

    angle of inclination of the plane

    C.

    both (a) and (b)

    D.

    none of these


  9. The force induced in the string BC due to the load W as shown in the below figure is

  10. A.

    W sin θ

    B.

    W cos θ

    C.

    W tan θ

    D.

    W cot θ