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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


  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.


  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.


  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.

  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


  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.


  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


  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


  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.


  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