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

  • The impulse reaction turbine has its driving force


  • Options
  • A. as an impulsive force
  • B. as a reaction force
  • C. partly as an impulsive force and partly as a reaction force
  • D. none of the above

  • Correct Answer
  • partly as an impulsive force and partly as a reaction force 

    • Steam Nozzles and Turbines problems

    Search Results

    • 1. The turbine blades are

    • Options
    • A. straight
    • B. circular
    • C. curved
      • Discuss
    • 2. 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
    • 3. The flow through a nozzle is regarded as

    • Options
    • A. constant volume flow
    • B. constant pressure flow
    • C. isothermal flow
    • D. isentropic flow
      • Discuss
    • 4. The critical pressure ratio (p2/p1) is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. 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
    • 6. The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop

    • Options
    • A. remains the same
    • B. increases
    • C. decreases
    • D. is unpredictable
      • Discuss
    • 7. Steam turbines are used for

    • Options
    • A. large marine propulsion
    • B. electric power generation
    • C. direct drive of fans, compressors, pumps
    • D. all of these
      • Discuss
    • 8. De-Laval turbine is a

    • Options
    • A. single rotor impulse turbine
    • B. multi-rotor impulse turbine
    • C. impulse reaction turbine
    • D. none of these
      • Discuss
    • 9. The steam leaves the nozzle at a

    • Options
    • A. high pressure and a low velocity
    • B. high pressure and a high velocity
    • C. low pressure and a low velocity
    • D. low pressure and a high velocity
      • Discuss
    • 10. Parson's turbine is a

    • Options
    • A. simple impulse turbine
    • B. simple reaction turbine
    • C. impulse-reaction turbine
    • D. none of these
      • Discuss

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