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

  • A regenerative steam cycle renders


  • Options
  • A. increased work output per unit mass of steam
  • B. decreased work output per unit mass of steam
  • C. increased thermal efficiency
  • D. decreased work output per unit mass of steam as well as increased thermal efficiency

  • Correct Answer
  • decreased work output per unit mass of steam as well as increased thermal efficiency 

    • Steam Nozzles and Turbines problems

    Search Results

    • 1. The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

    • Options
    • A. remains constant
    • B. decreases
    • C. increases
      • Discuss
    • 2. The variation of steam pressure in the nozzle depends upon

    • Options
    • A. velocity of steam
    • B. specific volume of steam
    • C. dryness fraction of steam
    • D. all of these
      • Discuss
    • 3. Thermal equilibrium means that the flow of steam is

    • Options
    • A. isothermal
    • B. isentropic
    • C. hyperbolic
    • D. polytropic
      • Discuss
    • 4. The efficiency of reaction turbine is maximum when (where ? = Angle made by the absolute velocity (V) at inlet)

    • Options
    • A. Vb = 0.5 V cos ?
    • B. Vb = V cos ?
    • C. Vb = 0.5 V2 cos ?
    • D. Vb = V2 cos ?
      • Discuss
    • 5. In a nozzle, whole frictional loss is assumed to occur between

    • Options
    • A. inlet and thoroat
    • B. inlet and outlet
    • C. throat and exit
    • D. all of these
      • Discuss
    • 6. The ratio of the useful heat drop to the isentropic heat drop is called

    • Options
    • A. condenser efficiency
    • B. nozzle efficiency
    • C. boiler efficiency
    • D. vacuum efficiency
      • Discuss
    • 7. The critical pressure ratio (p2/p1) is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. The flow through a nozzle is regarded as

    • Options
    • A. constant volume flow
    • B. constant pressure flow
    • C. isothermal flow
    • D. isentropic flow
      • Discuss
    • 9. The ratio of the workdone on the blades to the energy supplied to the blades, is called

    • Options
    • A. blading efficiency
    • B. nozzle efficiency
    • C. gross or stage efficiency
    • D. mechanical efficiency
      • Discuss
    • 10. The turbine blades are

    • Options
    • A. straight
    • B. circular
    • C. curved
      • Discuss

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