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Civil Engineering :: Applied Mechanics and Graphic Statics

  1. The velocity of a moving body, is

  2. A.

     A vector quantity

    B.

     A scalar quantity

    C.

     A constant quantity

    D.

     None of these


  3. To double the period of oscillation of a simple pendulum

  4. A.

     The mass of its bob should be doubled

    B.

     The mass of its bob should be quadrupled

    C.

     Its length should be quadrupled

    D.

     Its length should be doubled


  5. A particle moves with a velocity of 2 m/sec in a straight line with a negative acceleration of 0.1 m/sec2. Time required to traverse a distance of 1.5 m, is

  6. A.

     40 sec

    B.

     30 sec

    C.

     20 sec

    D.

     15 sec


  7. The equation of motion of a particle starting from rest along a straight line is x = t3 - 3l2 + 5. The ratio of the velocities after 5 sec and 3 sec will be

  8. A.

     2

    B.

     3

    C.

     4

    D.

     5


  9. The equation of motion of a particle starting from rest along a straight line is x = t³ - 3t²+ 5. The ratio of the accelerations after 5 sec and 3 sec will be

  10. A.

     2

    B.

     3

    C.

     4

    D.

     5


  11. A shell of mass 100 kg travelling with a velocity of 10 m/sec breaks into two equal pieces during an explosion which provides an extra kinetic energy of 20000 Joules. If the pieces continue to move in the same direction as before, then the speed of the faster one must be

  12. A.

     20 m/sec

    B.

     30 m/sec

    C.

     40 m/sec

    D.

     50 m/sec


  13. The angular speed of a car while taking a circular turn of radius 100 m at 36 km/hour, is

  14. A.

     0.1 radian/sec

    B.

     1 radian/sec

    C.

     100 radian/sec

    D.

     1000 radian/sec


  15. At the instantaneous center, the velocity of the moving lamina at any instant is

  16. A.

     Zero

    B.

     Maximum

    C.

     Minimum

    D.

     Varying


  17. Which one of the following statements is true?

  18. A.

     The tangent of the angle of friction is equal to coefficient of friction

    B.

     The angle of repose is equal to angle of friction

    C.

     The tangent of the angle of repose is equal to coefficient of friction

    D.

     All the above


  19. A ball is dropped from a height of 16 m on a horizontal floor. If it rebounds to a height of 9 m after striking the floor, the coefficient of restitution between ball and floor is

  20. A.

     1/4

    B.

     2/3

    C.

     3/4

    D.

     4/3