Home / Mechanical Engineering / Hydraulics and Fluid Mechanics in ME :: section-1

Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

  1. The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

  2. A.

     dQ/Q = 3/2 × (dH/H)

    B.

     dQ/Q = 2 × (dH/H)

    C.

     dQ/Q = 5/2 × (dH/H)

    D.

     dQ/Q = 3 × (dH/H)


  3. The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

  4. A.

     dQ/Q = (1/2) × (dH/H)

    B.

     dQ/Q = (3/4) × (dH/H)

    C.

     dQ/Q = (dH/H)

    D.

     dQ/Q = (3/2) × (dH/H)


  5. According to Bernoulli's equation

  6. A.

     Z + p/w + v²/2g = constant

    B.

     Z + p/w - v²/2g = constant

    C.

     Z - p/w + v²/2g = constant

    D.

     Z - p/w - v²/2g = constant


  7. Which of the following instruments is used to measure flow on the application of Bernoulli's theorem?

  8. A.

     Venturimeter

    B.

     Orifice plate

    C.

     Nozzle

    D.

     All of the above


  9. Ratio of inertia force to surface Jension is known as

  10. A.

     Mach number

    B.

     Froude number

    C.

     Reynolds’s number

    D.

     Weber’s number


  11. The ratio of absolute viscosity to mass density is known as

  12. A.

     Specific viscosity

    B.

     Viscosity index

    C.

     Kinematic viscosity

    D.

     Coefficient of viscosity


  13. The velocity at which the flow changes from laminar flow to turbulent flow is called

  14. A.

     Critical velocity

    B.

     Velocity of approach

    C.

     Sub-sonic velocity

    D.

     Super-sonic velocity


  15. Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

  16. A.

     Cc × Cv

    B.

     Cc × Cr

    C.

     Cv × Cr

    D.

     Cc/Cr


  17. An average value of coefficient of velocity is

  18. A.

     0.62

    B.

     0.76

    C.

     0.84

    D.

     0.97


  19. A flow through an expanding tube at constant rate is called

  20. A.

     Steady uniform flow

    B.

     Steady non-uniform flow

    C.

     Unsteady uniform flow

    D.

     Unsteady non-uniform flow