The mechanical efficiency of an impulse turbine is

A. Ratio of the actual power produced by the turbine to the energy actually supplied by the turbine

B. Ratio of the actual work available at the turbine to the energy imparted to the wheel

C. Ratio of the Work done on the wheel to the energy of the jet

D. None of the above

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  1. Reaction turbines are used for
  2. The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of…
  3. A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction…
  4. Mechanical efficiency of a centrifugal pump is the ratio of
  5. Indicator diagram of a reciprocating pump is a graph between
  6. Which of the following is not an impulse turbine?
  7. High specific speed of a pump implies it is
  8. The unit discharge through the turbine is
  9. The cavitation in a hydraulic machine
  10. The overall efficiency of a reaction turbine is the ratio of
  11. A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its…
  12. The unit speed of the turbine runner is
  13. Which type of the pump is different from others in the same group?
  14. The discharge through a reaction turbine ________ with the increase in unit speed.
  15. The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is _______ of the jet…
  16. A hydraulic coupling belongs to the category of
  17. Braking jet in an impulse turbine is used
  18. According to fan laws, for the fans having constant wheel diameters, the power demand varies
  19. Which of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?
  20. The specific speed (Ns) of a centrifugal pump is given by
  21. The specific speed of turbine is defined as the speed of a unit
  22. Which of the following statement is correct?
  23. The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine,…
  24. The optimum value of vane exit angle for a centrifugal pump impeller is
  25. A Francis turbine is used when the available head of water is
  26. In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly…
  27. When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics…
  28. The undershot water wheels are those in which
  29. According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary
  30. A hydraulic ram is a device used to