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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

  2. A.

     Hydraulic

    B.

     Mechanical

    C.

     Overall

    D.

     None of these


  3. Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

  4. A.

     Internal

    B.

     External

    C.

     Both A and B

    D.

     None of these


  5. A notch is used to measure __________ of liquids.

  6. A.

     Pressure

    B.

     Discharge

    C.

     Velocity

    D.

     Volume


  7. When the Venturimeter is inclined, then for a given flow it will show __________ reading.

  8. A.

     Same

    B.

     More

    C.

     Less

    D.

     None of these


  9. The highest efficiency is obtained with a channel of __________ section.

  10. A.

     Circular

    B.

     Square

    C.

     Rectangular

    D.

     Trapezoidal


  11. When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.

  12. A.

     Concave

    B.

     Convex

    C.

     Plane

    D.

     None of these


  13. Water is _________ liquid.

  14. A.

     A compressible

    B.

     An incompressible

    C.

     Both A and B

    D.

     None of these


  15. Water is a __________ fluid.

  16. A.

     Real

    B.

     Ideal

    C.

     Newtonian

    D.

     Non-Newtonian


  17. The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy’s coefficient of friction for pipe, and l = Length of pipe)

  18. A.

     d = (D⁵/8fl)1/2

    B.

     d = (D⁵/8fl)1/3

    C.

     d = (D⁵/8fl)1/4

    D.

     d = (D⁵/8fl)1/5


  19. The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number)

  20. A.

     1/RN

    B.

     4/RN

    C.

     16/RN

    D.

     64/RN