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Civil Engineering :: Applied Mechanics

  1. Time of flight of a projectile on a horizontal plane, is

  2. A.

    2usinag

    B.

    2ucosag

    C.

    2utan ag

    D.

    2utcot ag

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  3. The reaction RB of the roller support B of the beam shown in below figure is

  4. A.

    10.8 t

    B.

    10.6 t

    C.

    10.4 t

    D.

    10.2 t.

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  5. The acceleration of a train starting from rest at any instant is  16(V+1)m/sec2 where V is the velocity of the train in m/sec. The train will attain a velocity of 36 km/hour after travelling a distance of

  6. A.

    2000 m

    B.

    2100 m

    C.

    2200 m

    D.

    2300 m

    E.

    2500 m.

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  7. The maximum frictional force which comes into play, when a body just begins to slide over the surface of a an other body, is known

  8. A.

    sliding friction

    B.

    rolling friction

    C.

    limiting friction

    D.
    none of these.

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  9. If G is the Gauge of track, v is velocity of the moving vehicle, g is the acceleration due to gravity and r is the radius of a circular path, the required superelevation is

  10. A.

    gV2Gr

    B.

    Gr2gr

    C.

    Gr2gV2

    D.

    GV2gV

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  11.  

    If two forces of 3 kg and 4 kg act at right angles to each other, their resultant force will be equal to

  12. A.

    7 kg

    B.

    1 kg

    C.

    5 kg

    D.

    1/7 kg

    E.

    none of these.

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  13. The c.g. of the shaded area of the below figure from the x-axis is

  14. A.

    a4

    B.

    3a4

    C.

    3b10

    D.

    3a10

    E.

    3a5

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  15. If v and Ï‚¬° are linear and angular velocities, the centripetal acceleration of a moving body along the circular path of radius r, will be

  16. A.

    rV2

    B.

    V2r

    C.

    rw2

    D.

    w2r

    E.

    rw

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  17. Two shots fired simultaneously from the top and bottom of a vertical tower with elevations of 30° and 45° respectively strike a target simultaneously. If horizontal distance of the target from the tower is 1000 m, the height of the tower is

  18. A.

    350 m

    B.

    375 m

    C.

    400 m

    D.

    425 m.

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  19. For the given values of initial velocity of projection and angle of inclination of the plane, the maximum range for a projectile projected upwards will be obtained, if the angle of projection is

  20. A.

    a = n4β2

    B.

    a = n2 +β2

    C.

    a = β2 - n2

    D.

    a = n4β4

    E.

    a = n2β2

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