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Home ‣ Mechanical Engineering ‣ Steam Nozzles and Turbines See What Others Are Saying!
  • Question

  • For a Parson's reaction turbine, if ?1 and ?2 are fixed blade angles at inlet and exit respectively and ?1 and ?2 are the moving blade angles at entrance and exit respectively, then


  • Options
  • A. ?1 = ?2 and ?1 = ?2
  • B. ?1 = ?1 and ?2 = ?2
  • C. ?1 < ?1 and ?2 > ?2
  • D. ?1 = ?2 and ?1 = ?2

  • Correct Answer
  • ?1 = ?2 and ?1 = ?2 

    • More questions

    • 1. The function of an oil control orifice is that it

    • Options
    • A. returns cylinder head lubricating oil to the oil pan at high speed
    • B. turns oil into fine mist for spray lubrication
    • C. regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
    • D. removes impurities from cylinder head lubricating oil
      • Discuss
    • 2. The missing quantity per stroke is equal to

    • Options
    • A. cylinder feed - indicated mass of steam
    • B. cylinder feed + indicated mass of steam
    • C. mass of cushion steam + indicated mass of steam
    • D. mass of cushion steam + cylinder feed
      • Discuss
    • 3. Quenching is not necessary when hardening is done by

    • Options
    • A. case hardening
    • B. flame hardening
    • C. nitriding
    • D. any one of these
      • Discuss
    • 4. The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 5. Nodular cast iron is produced by adding __________ to the molten cast iron.

    • Options
    • A. nickel
    • B. chromium
    • C. copper
    • D. magnesium
      • Discuss
    • 6. Which of the following statement is correct as regard to centrifugal compressors?

    • Options
    • A. The flow of air is parallel to the axis of the compressor.
    • B. The static pressure of air in the impeller increases in order to provide centripetal force on the air.
    • C. The impeller rotates at high speeds.
    • D. The maximum efficiency is higher than multi-stage axial flow compressors.
      • Discuss
    • 7. Parallel fillet welds are designed for bending strength.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 8. When the dimension is expressed as , then the basic size is

    • Options
    • A. 20 mm
    • B. 20.035 mm
    • C. 20.025 mm
    • D. 19.975 mm
      • Discuss
    • 9. The temperature required for full annealing in hyper-eutectoid steel is

    • Options
    • A. 30° C to 50° C above upper critical temperature
    • B. 30° C to 50° C below upper critical temperature
    • C. 30° C to 50° C above lower critical temperature
    • D. 30° C to 50° C below lower critical temperature
      • Discuss
    • 10. The wet bulb depression is zero when relative humidity is

    • Options
    • A. zero
    • B. 0.5
    • C. 0.75
    • D. 1.0
      • Discuss

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