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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

  1. The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

  2. A.

     [wa (V - v)]/2g

    B.

     [wa (V - v)]/g

    C.

     [wa (V - v)²]/2g

    D.

     [wa (V - v²)]/g


  3. Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

  4. A.

     Adhesion

    B.

     Cohesion

    C.

     Viscosity

    D.

     Compressibility


  5. The flow in which each liquid particle has a definite path and their paths do not cross each other is called

  6. A.

     One dimensional flow

    B.

     Streamline flow

    C.

     Steady flow

    D.

     Turbulent flow


  7. In case of flow through parallel pipes,

  8. A.

     The head loss for all the pipes is same

    B.

     The total discharge is equal to the sum of discharges in the various pipes

    C.

     The total head loss is the sum of head losses in the various pipes

    D.

     Both (A) and (B)


  9. A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

  10. A.

     0.25 m3/s

    B.

     0.5 m3/s

    C.

     1.5 m3/s

    D.

     2.5 m3/s


  11. A nozzle placed at the end of a water pipe line discharges water at a

  12. A.

     Low pressure

    B.

     High pressure

    C.

     Low velocity

    D.

     High velocity


  13. If ‘w’ is the specific weight of liquid and ‘k’ the depth of any point from the surface, then pressure intensity at that point will be

  14. A.

     h

    B.

     wh

    C.

     w/h

    D.

     h/w


  15. All the terms of energy in Bernoulli's equation have dimension of

  16. A.

     Energy

    B.

     Work

    C.

     Mass

    D.

     Length


  17. The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

  18. A.

     (8/15) Cd. 2g. H

    B.

     (8/15) Cd. 2g. H3/2

    C.

     (8/15) Cd. 2g. H²

    D.

     (8/15) Cd. 2g. H5/2


  19. If the depth of water in an open channel is less than the critical depth, the flow is called

  20. A.

     Critical flow

    B.

     Turbulent flow

    C.

     Tranquil flow

    D.

     Torrential flow