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Civil Engineering :: Applied Mechanics

  1. One half of a vibration of a body, is called

  2. A.

    period time

    B.

    oscillation

    C.

    beat

    D.

    amplitude.

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  3. On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts

  4. A.

    towards the wall at its upper end

    B.

    away from the wall at its upper end

    C.

    upwards at its upper end

    D.

    downwards at its upper end

    E.

    none of these.

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  5. The acceleration of a particle moving along the circumference of a circle with a uniform speed, is directed

  6. A.

    radially

    B.

    tangentially at that point

    C.

    away from the centre

    D.

    towards the centre.

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  7.  

    From the circular plate of a diameter 6 cm is cut out a circular plate whose diameter is equal to radius of the plate. The c.g. of the remainder shifts from the original position through

  8. A.

    0.25 cm

    B.
    0.50 cm
    C.

    0.75 cm

    D.

    1.00 cm.

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  9. If a particle moves with a uniform angular velocity ω radians/sec along the circumference of a circle of radius r, the equation for the velocity of the particle, is

  10. A.

    v = ω \(\sqrt{Y^2-r^2}\)

    B.

    y = ω\(\sqrt{Y-r}\)

    C.

    v = ω \(\sqrt{r^2+Y^2}\)

    D.

    v = ω\(\sqrt{r^2-Y^2}\)

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  11.  

    In simple harmonic motion, acceleration of a particle is proportional to

  12. A.

    rate of change of velocity

    B.

    displacement

    C.
    velocity
    D.

    direction

    E.

    none of these.

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  13.  

    A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if

  14. A.

    floor is smooth and the wall is rough

    B.

    floor is rough and the wall is smooth

    C.

    floor and wall both are smooth surfaces

    D.

    floor and wall both are rough surfaces.

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  15. In a simple screw jack, the pitch of the screw is 9 mm and length of the handle operating the screw is 45 cm. The velocity ratio of the system is

  16. A.

    1.5

    B.
    5
    C.

    25

    D.

    314

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

  18. A.

    the mass of its bob should be doubled

    B.

    the mass of its bob should be quadrupled

    C.
    its lenght should be quadrupled
    D.
    its length should be doubled.

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  19.  

    For a particle moving with a simple harrmonic motion, the frequency is

  20. A.

    directly proportional to periodic time

    B.

    inversely proportional to periodic time

    C.

    inversely proportional to its angular velocity

    D.

    directly proportional to its angular velocity

    E.
    none of these.

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