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Civil Engineering :: Applied Mechanics and Graphic Statics

  1. The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is

  2. A.

     wl/4d

    B.

     wl²/4d

    C.

     wl²/8d

    D.

     wl²/16d


  3. A rope is wrapped twice around a rough pole with a coefficient of friction ‘A . It is subjected to a force Fj at one end and a gradually increasing force F2 is applied at the other end till the rope just starts slip-ping. At this instant the ratio of F2 to Fi is

  4. A.

     1

    B.

     e2*

    C.

     e4*

    D.

     e*72


  5. If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along

  6. A.

     The same line in the same sense

    B.

     The same line in opposite sense

    C.

     The perpendicular to both the lines

    D.

     None of these


  7. Force polygon method is applicable for

  8. A.

     Any coplanar force system

    B.

     A system of parallel forces only

    C.

     Concurrent coplanar force system

    D.

     Non-concurrent coplanar force system


  9. Force polygon method is applicable for

  10. A.

     any copianar force system

    B.

     a system of parallel forces only

    C.

     concurrent copianar force system

    D.

     non-concurrent copianar force system


  11. From a solid cylinder of height 8 cm and radius 4 cm, a right circular cone is scooped out on the same base and having the same height as that of the cylinder. The C.G. of the remainder is at a height of

  12. A.

     4.5 cm

    B.

     5.0 cm

    C.

     5.25 cm

    D.

     5.5 cm


  13. The unit of impulse, is

  14. A.

     kg.m/sec

    B.

     kg.m/sec

    C.

     kg.m/sec²

    D.

     kg.m/sec


  15. The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of

  16. A.

     8.04 km/sec at a height of 285 km

    B.

     11.11 km/sec at a height of 37,400 km

    C.

     11.26 km/sec, the satellite escapes the pull of the earth

    D.

     All the above


  17. Two circular discs of same weight and thickness are made from metals having different densities. Which disc will have the larger rotational inertia about its central axis?

  18. A.

     Disc with larger density

    B.

     Disc with smaller density

    C.

     Both discs will have same rotational inertia

    D.

     None of the above


  19. A rod 5 m in length is moving in a vertical plane. When it is inclined at 60° to horizontal, its lower end is moving horizontally at 3 m/sec and upper end is moving in vertical direction. The velocity of its upper end, is

  20. A.

     0.5 m/sec

    B.

     1.0 m/sec

    C.

     1.5 m/sec

    D.

     2.5 m/sec