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

  • Stage efficiency is also known as


  • Options
  • A. diagram efficiency
  • B. nozzle efficiency
  • C. gross efficiency
  • D. none of these

  • Correct Answer
  • gross efficiency 

    • Steam Nozzles and Turbines problems

    Search Results

    • 1. In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is

    • Options
    • A. low
    • B. very low
    • C. high
    • D. very high
      • Discuss
    • 2. In a reaction turbine, when steam flows through the moving blades,

    • Options
    • A. pressure increases while velocity decreases
    • B. pressure decreases while velocity increases
    • C. pressure and velocity both decreases
    • D. pressure and velocity both increases
      • Discuss
    • 3. The effect of friction in the nozzle __________ dryness fraction of steam.

    • Options
    • A. has no effect on
    • B. decreases
    • C. increases
      • Discuss
    • 4. The critical pressure ratio is given by (where p1 = Initial pressure of steam, and p2 = Pressure of steam at throat or critical pressure)

    • Options
    • A. p1 p2
    • B. p1/p2
    • C. p2/p1
    • D. p1 + p2
      • Discuss
    • 5. A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

    • Options
    • A. back pressure turbine
    • B. pass out turbine
    • C. low pressure turbine
    • D. impulse turbine
      • Discuss
    • 6. The correct mixture strength (by weight) for petrol is about

    • Options
    • A. 14.6:1
    • B. 18.5:1
    • C. 20.4:1
    • D. 22.6:1
      • Discuss
    • 7. A petrol engine, during suction stroke draws

    • Options
    • A. air only
    • B. petrol only
    • C. a mixture of petrol and air
      • Discuss
    • 8. A moderator

    • Options
    • A. absorbs neutrons
    • B. does not absorb neutrons
    • C. accelerates neutrons
    • D. none of these
      • Discuss
    • 9. A turbo-jet does not require a turbine to drive the compressor.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. For the same maximum pressure and heat input, the exhaust temperature of petrol engine is __________ than that of diesel engine.

    • Options
    • A. less
    • B. more
      • Discuss

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