Applied Thermodynamics - II Mid - I, September - 2014

 August 04, 2015     VIKRAM     583

1. 

The theoretical cycle on which the steam turbine works

  • A. 

    Carnot Cycle

  • B. 

    Rankine Cycle

  • C. 

    Otto cycle

  • D. 

    none of the above



2. 

Rankine cycle efficiency reaches

  • A. 

    (h- h2) / (h- hf2)

  • B. 

    (h+ h2) / (h- hf2)

  • C. 

    (h- h2) / (h+ hf2)

  • D. 

    none



3. 

The thermal efficiency of the cycle can be improved by _________ the average temperature at which heat is added to the cycle.

  • A. 

    decrease

  • B. 

    equal

  • C. 

    increase

  • D. 

    none



4. 

The common chimney produces the draught type

  • A. 

    induced

  • B. 

    forced

  • C. 

    natural

  • D. 

    none of above



5. 

Steel chimney can produce ______ draught than brick chimney with same height

  • A. 

    more

  • B. 

    less

  • C. 

    equal

  • D. 

    more or less



6. 

The efficiency of chimney is approximately

  • A. 

    10%

  • B. 

    25%

  • C. 

    40%

  • D. 

    0.25%



7. 

In steam nozzle heat energy of steam is converted in to

  • A. 

    Potential energy

  • B. 

    kinetic energy

  • C. 

    internal energy

  • D. 

    none



8. 

Velocity in steam nozzle C =

  • A. 

    44.72(k.hd)1/2

  • B. 

    74.72(k.hd)1/2

  • C. 

    44.72(k.hd)3/2

  • D. 

    74.72(k.hd))3/ 2



9. 

Steam turbine is a prime mover in which the ______ energy of the steam is ransferred in to ______ energy.

  • A. 

    kinetic, potential

  • B. 

    kinetic, mechanical

  • C. 

    Potential, kinetic

  • D. 

    none of the above



10. 

For maximum discharge in steam nozzle is

  • A. 

    m = A.V/v kg/sec

  • B. 

    m = A.v/V kg/sec

  • C. 

    m = A.V.v kg/sec

  • D. 

    none



11. 

In Rankine cycle the work out put from the turbine is given by change of _________ between inlet and outlet.



12. 

Regenerative cycle thermal efficiency is always __________ than rankine cycle thermal efficiency.



13. 

The improvement in thermal efficiency due to reheat is greatly dependent upon __________________ with respect to the original pressure of steam.



14. 

There is no difference between steam generating unit and _________.



15. 

If the axis is vertical, it is called a ___________ boiler.



16. 

Steam injector is used to supply _________ water to boiler.



17. 

The temperature difference between T2 and TR is called degree of _______________.



18. 

Work done on blade/sec = Force x ____________________ .



19. 

The efficiency of impulse turbine is _______ when compared to Reaction turbine.



20. 

Area of blades in impulse turbine is ________________.



  Related Links
R09 - I Mid - Term Examinations, September - 2014