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Civil Engineering :: Applied Mechanics

  1. For a body moving with simple harmonic motion, the number of cycles per second, is known as its

  2. A.

    oscillation

    B.

    amplitude

    C.

    periodic time

    D.
    beat
    E.

    frequency.


  3. If the horizontal range is 2.5 times the greatest height, the angle of projection of the projectile, is

  4. A.

    57°

    B.

    58°

    C.
    59°
    D.

    60°.


  5. The shape of a suspended cable under its own weight, is

  6. A.

    parabolic

    B.

    circular

    C.

    catenary

    D.

    elliptical.


  7. Time required to stop a car moving with a velocity 20 m/sec within a distance of 40 m, is

  8. A.

    2 sec

    B.

    3 sec

    C.

    4 sec

    D.

    5 sec

    E.
    6 sec.

  9.  

    The characteristic of a couple, is :

  10. A.
    algebraic sum of forces, constituting a couple is zero
    B.

    algebraic sum of moments of forces, constituting a couple, about any poin, is same

    C.

    a couple can be balanced only by a couple but of opposite sense

    D.

    a couple can be never the balanced by a single force

    E.

    all the above.


  11. Ball A of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/s hits an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after impact would be

  12. A.

    zero

    B.

    5 m/sec

    C.

    10 m/sec

    D.

    none of these.


  13.  

    Equation of motion of a point in a straight line, is

  14. A.

    v = u + ft

    B.

    S = ut +  \(\frac { 1 } { 2 } \) ft2

    C.

    2fS = v2 - u2

    D.

    all the above.


  15. For the system of the loads shown in below figure, the time required for the 6.6 kg load to fall on the edge, is

  16. A.

    1 sec.

    B.

    2 sec.

    C.

    3 sec.

    D.

    4 sec.

    E.

    5 sec.


  17. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The tension in the string is

  18. A.

    17.5 kg

    B.

    19.5 kg

    C.

    22.5 kg

    D.

    25 kg.


  19. The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is

  20. A.

    weight

    B.

    mass

    C.

    interia

    D.

    momentum.