Online Thermal Power Plant Test

30 Questions | Total Attempts: 1473

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Online Thermal Power Plant Test


Questions and Answers
  • 1. 
    Out of the following which one is not a non-conventional source of energy  ?
    • A. 

      Tidal Energy

    • B. 

      Geothermal Energy

    • C. 

      Nuclear Energy

    • D. 

      Wind Energy

  • 2. 
    Pulverized coal is.....
    • A. 

      Coal free from ash

    • B. 

      Non-smoking coal

    • C. 

      Coal which bums For long time

    • D. 

      Coal broken into fine particles.

  • 3. 
    Heating value of Indonesian coal is approximately?
    • A. 

      1000-2000 kcal / kg

    • B. 

      2000-4000 kcal / kg

    • C. 

      5000-6500 kcal / kg

    • D. 

      9000-10,500 kcal / kg

  • 4. 
    Water gas is a mixture of ?
    • A. 

      CO2 and O2

    • B. 

      O2and H2

    • C. 

      H2, N2 and O2

    • D. 

      CO, N2 and H2

  • 5. 
    . Coal used in power plant is also known as
    • A. 

      Steam coal

    • B. 

      Charcoal

    • C. 

      Coke

    • D. 

      Soft coal

  • 6. 
    Which of the following is considered as superior quality of coal ?
    • A. 

      Bituminous coal

    • B. 

      Peat

    • C. 

      Lignite

    • D. 

      Coke

  • 7. 
    In a power plant, coal is carried from storage place to boilers generally by means of
    • A. 

      Bucket

    • B. 

      V-belts

    • C. 

      Trolleys

    • D. 

      Manually

  • 8. 
    Live storage of coal in a power plant means
    • A. 

      coal ready for combustion

    • B. 

      Preheated coal

    • C. 

      Storage of coal sufficient to meet 24 hour demand of the plant

    • D. 

      Coal in transit

  • 9. 
    Pressure of steam in condenser is
    • A. 

      Atmospheric pressure

    • B. 

      More than pressure

    • C. 

      Slightly less than pressure

    • D. 

      Much less than pressure

  • 10. 
    Equipment used for pulverizing the coal is known as
    • A. 

      Ball mill

    • B. 

      Hopper

    • C. 

      Burner

    • D. 

      Stoker

  • 11. 
    Power plants using coal work closely on known which of the following cycle ?
    • A. 

      Otto cycle

    • B. 

      Binary vapor cycle

    • C. 

      Brayton cycle

    • D. 

      Rankine cycle

  • 12. 
    Critical pressure of water is
    • A. 

      1 kg / cm2

    • B. 

      100 kg / cm2

    • C. 

      155 kg / cm2

    • D. 

      213.8 kg / cm2

  • 13. 
    The efficiency of a thermal power plant improves with
    • A. 

      Increased quantity of coal burnt

    • B. 

      Larger quantity of water used

    • C. 

      Lower load in the plant

    • D. 

      Use of high steam pressures

  • 14. 
    Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal power plant ?
    • A. 

      Reheating of steam at intermediate stage

    • B. 

      Regeneration use of steam for heating boiler feed water

    • C. 

      Use of high pressures

    • D. 

      All of the above

  • 15. 
    Steam pressures usually used in thermal power plants are
    • A. 

      5 kg/cm2 to 10 kg / cm2

    • B. 

      50 kg/cm2 to 100 kg / cm2

    • C. 

      110 kg/cm2 to 170 kg / cm2

    • D. 

      200 kg/cm2 to 215 kg / cm2

  • 16. 
    Burning of low grade fuel can be improved by
    • A. 

      Blending with better quality

    • B. 

      Oil assisted ignition

    • C. 

      Pulverizing

    • D. 

      Any of the above

  • 17. 
    As steam expands in turbine
    • A. 

      Its pressure increases

    • B. 

      Its specific volume increases

    • C. 

      Its boiling point increases

    • D. 

      Its temperature increases

  • 18. 
    Water is supplied to a boiler
    • A. 

      At atmospheric pressure

    • B. 

      At slightly more than atmospheric pressure

    • C. 

      At 100 cm/kg2

    • D. 

      At more than the steam pressure on the boiler

  • 19. 
    Which of the following enters the super heater of a boiler ?
    • A. 

      Cold water

    • B. 

      Hot water

    • C. 

      Wet steam

    • D. 

      Super-heated steam

  • 20. 
    Super heated steam is always
    • A. 

      At a temperature higher than the saturation temperature corresponding to a steam pressure

    • B. 

      At a pressure more than the boiler steam pressure

    • C. 

      Separated from water particles before being supplied to turbine

    • D. 

      At a pressure less than the maximum cycle pressure

  • 21. 
    In economizer, the heat of flue gases is used to reheat the steam
    • A. 

      True

    • B. 

      False

  • 22. 
    Air heaters are used in power plants to heat air used for combustion of coal
    • A. 

      True

    • B. 

      False

  • 23. 
    Corrosion of air pre heater tube can be minimized by limiting the cooling of the flue gas to a temperature above the dew point
    • A. 

      True

    • B. 

      False

  • 24. 
    Air from air pre heater is sent to forced draft fans
    • A. 

      True

    • B. 

      False

  • 25. 
    In a silver oxide cell depolarization is accompanied by oxide of silver
    • A. 

      True

    • B. 

      False

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