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Home ‣ Mechanical Engineering ‣ Steam Nozzles and Turbines Comments
  • Question

  • The ratio of the energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam is called mechanical efficiency.


  • Options
  • A. Yes
  • B. No

  • Correct Answer
  • No 

    • Steam Nozzles and Turbines problems

    Search Results

    • 1. The pressure of steam, in reaction turbines, is reduced in the fixed blades as well as in moving blades.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 2. The maximum discharge of steam through a convergent-divergent nozzle depends upon

    • Options
    • A. area of nozzle at throat
    • B. initial pressure and volume of steam
    • C. final pressure ofsteam leaving the nozzle
    • D. both (a) and (b)
      • Discuss
    • 3. The process of maintaining the speed of the turbine constant for various load conditions, is known as

    • Options
    • A. bleeding
    • B. reheating
    • C. governing
    • D. none of these
      • Discuss
    • 4. The ratio of the work delivered at the turbine shaft to the heat supplied is called overall thermal efficiency of turbine.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The critical pressure ratio for initially dry saturated steam is

    • Options
    • A. 0.546
    • B. 0.577
    • C. 0.582
    • D. 0.601
      • Discuss
    • 6. The pressure of steam at throat of a steam nozzle is called critical pressure.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 7. The friction in the nozzle __________ exit velocity of steam.

    • Options
    • A. has no effect on
    • B. decreases
    • C. increases
      • Discuss
    • 8. The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.

    • Options
    • A. same
    • B. less
    • C. more
      • Discuss
    • 9. The pressure of steam __________ while flowing through a nozzle.

    • Options
    • A. increases
    • B. decreases
    • C. remains constant
      • Discuss
    • 10. In a single stage impulse turbine, the velocity of steam approaching nozzles is negligible.

    • Options
    • A. True
    • B. False
      • Discuss

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