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  1. Frictional force encountered after commencement of motion is called

  2. A.

     post friction

    B.

     limiting friction

    C.

     frictional resistance

    D.

     dynamic friction.

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  3. The resultant of the following three couples 20 kg force, 0.5 m arm, + ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be

  4. A.

     20 kg, – ve sense

    B.

     20 kg, + ve sense

    C.

     10 kg, + ve sense

    D.

     10 kg, – ve sense

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  5. Center of percussion is

  6. A.

     the point of C.G.

    B.

     the point of metacentre

    C.

     the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

    D.

     point of suspension

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  7. Two coplanar couples having equal and opposite moments

  8. A.

     Balance each other

    B.

     Produce a couple and an unbalanced force

    C.

     Are equivalent

    D.

     Produce a moment of couple

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  9. 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

  10. A.

     forces

    B.

     independence of forces

    C.

     balance of force

    D.

     resolution of forces.

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  11. The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are

  12. A.

     2 and V6

    B.

     3 and 1 kg

    C.

     V5 and V5

    D.

     2 and 5

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  13. If three forces acting in different planes can be represented by a triangle, these will be in

  14. A.

     non-equilibrium

    B.

     partial equilibrium

    C.

     full equilibrium

    D.

     unpredictable

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  15. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either

  16. A.

     meet in a point

    B.

     be all parallel

    C.

     at least two of them must meet

    D.

     all the above are correct

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  17. In determining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than

  18. A.

     Two members with unknown forces of the frame

    B.

     Three members with unknown forces of the frame

    C.

     Four members with unknown forces of the frame

    D.

     Three members with known forces of the frame

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  19. Which of the following is not a scalar quantity

  20. A.

     mass

    B.

     volume

    C.

     density

    D.

     acceleration.

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