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Civil Engineering :: Applied Mechanics

  1. The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface

  2. A.

    uneven distribution of the gravitational field

    B.
    gravity of the sun and the moon
    C.

    aerodynamic forces

    D.

    none of these.

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  3. If α and u are the angle of projection and initial velocity of a projectile respectively, the horizontal range of the projectile, is

  4. A.

    \(\frac { u^2sina } {g }\)

    B.

    \(\frac { u^2sin^2a } {g }\)

    C.

    \(\frac { u^2 sin a } {2g }\)

    D.

    \(\frac { u^2 sin^2 a } {2g }\)

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  5. Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation

  6. A.

    is directly proportional to their velocity of approach

    B.

    is inversely proportional to their velocity of approach

    C.
    bears a constant ratio to their velocity of approach
    D.

    is equal to the sum of their velocities of approach.

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  7. Two forces of 6 Newtons and 8 Newtons which are acting at right angles to each other, will have a resultant of

  8. A.

    5 Newtons

    B.

    8 Newtons

    C.

    10 Newtons

    D.
    12 Newtons.

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  9. A projectile is fired with a velocity of 100.3 m/sec. at an elevation of 60°. The velocity attained by the projectile when it is moving at a height of 100 m, is

  10. A.

    70 m/sec.

    B.

    75 m/sec.

    C.
    80 m/sec.
    D.

    85 m/sec.

    E.

    90 m/sec.

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  11. A body is said to move with Simple Harmonic Motion if its acceleration, is

  12. A.

    always directed away from the centre, the point of reference

    B.

    proportional to the square of the distance from the point of reference

    C.

    proportional to the distance from the point of reference and directed towards it

    D.

    inversely proportion to the distance from the point of reference

    E.

    none of these.

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  13. 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 reaction between the sphere and the wall of the arrangement made is

  14. A.

    102.5 kg

    B.

    105.5 kg

    C.

    108.5 kg

    D.

    110 kg.

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  15. Which one of the following laws is not applicable to a simple pendulum ?.

  16. A.

    The time period does not depend on its magnitude

    B.
    The time period is proportional to its length l
    C.

    The time period is proportional to \(\sqrt{l}\) where l is length

    D.

    The time period is inversely proportional to \(\sqrt{g}\)where g is the acceleration due to gravity.

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  17. The ratio of the reactions RA and RB of a simply supported beam shown in below figure is

  18. A.

    0.50

    B.

    0.40

    C.

    0.67

    D.

    1.00

    E.

    1.50

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  19.  

    Effect of a force on a body depends upon its

  20. A.

    direction

    B.

    magnitude

    C.

    position

    D.
    all the above.

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