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Civil Engineering :: Hydraulics

  1. If jet of water coming out from a nozzle with a velocity 9.81 m/s, the angle of elevation being 30°, the time to reach the highest point is

  2. A.

    0.25 s

    B.

    0.50 s

    C.

    1.0 s

    D.

    1.5 s.


  3. The discharge through a 100 mm diameter external mouth piece fitted to the side of a large vessel is 0.05948 m3/s. The head over the mouth piece is

  4. A.

    2 m

    B.

    2.5 m

    C.

    3.0 m

    D.

    4.0 m.


  5. If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass, the free level of fluid in a dipped glass tube will be

  6. A.

    higher than the surface of liquid

    B.

    same as the surface of liquid

    C.

    lower than the surface of liquid

    D.

    none of these.


  7.  

    The continuity equation

  8. A.

    expresses the relationship between work and energy

    B.

    relates the momentum per unit volume between two points on a stream line

    C.

    relates mass rate of flow along a stream line

    D.

    requires that Newton's second law of motion be satisfied at every point in fluid.


  9. Water displaced by a floating wooden block of density 0.75, 5 m long, 2 m wide and 3 m high, is

  10. A.

    17.5 m3

    B.

    20.0 m3

    C.

    22.5 m3

    D.

    25 km3.


  11. In pipe lines, a surge tank is provided

  12. A.

    to relieve the pressure due to water hammer

    B.

    to provide additional water head

    C.

    to overflow the pipe line when suddenly closed

    D.

    to remove the frictional loss in pipe.


  13. Total head of a liquid particle in motion is the sum of

  14. A.

    potential head and kinetic head

    B.

    kinetic head and pressure head

    C.

    potential head and pressure head

    D.

    potential head, kinetic head and pressure head.


  15. The velocity distribution of viscous fluid through a circular/pipe is :

  16. A.

    hyperbolic

    B.

    circular

    C.
    parabolic
    D.

    elliptical.


  17. If uvw are the components of the velocity v of a moving particle, the equation \(\frac { U } { dX} \)\(\frac { V } { dY} \)=\(\frac { W } { dZ} \)represents

  18. A.

    one diamensional flow

    B.

    two dimensional flow

    C.
    three dimensional flow
    D.

    none of these.


  19. Mercury is generally used in barometers because

  20. A.

    its vaour pressure is practically zero

    B.
    the height of the barometer will be less
    C.

    it is a best liquid

    D.

    both (a) and (b) above

    E.

    both (b) and (c) above.