Natural Draft Cooling Towers
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Questions and Answers

What are the two classes of cooling towers based on the method of air circulation?

  • Water vapour towers and air movement towers
  • Natural draft and mechanical draft (correct)
  • Large generating stations and thermal generating stations
  • Atmospheric towers and chimney towers
  • In which type of cooling tower is the air movement through the tower dependent on atmospheric conditions?

  • Large generating stations
  • Atmospheric towers (correct)
  • Mechanical draft towers
  • Chimney towers
  • Where are chimney towers mainly used?

  • Large cooling towers
  • Mechanical draft towers
  • Natural draft cooling towers
  • Thermal generating stations (correct)
  • What type of towers operate effectively only in locations with relatively constant winds and large open spaces?

    <p>Atmospheric towers</p> Signup and view all the answers

    What is the characteristic feature of chimney towers that induces natural convection airflow?

    <p>Majority of the tower height is purely chimney</p> Signup and view all the answers

    What is the purpose of the water falling from the distribution flume in a natural draft chimney tower?

    <p>To enhance the process of evaporation and cooling</p> Signup and view all the answers

    What should be checked and cleaned to ensure continuous effective operation of the tower?

    <p>The louvres, piping, and nozzles</p> Signup and view all the answers

    What may cause high discharge water temperature from the tower?

    <p>Restriction of air flow through the tower</p> Signup and view all the answers

    What could cause a reduction in water flow in the tower?

    <p>High concentration of solids in the water</p> Signup and view all the answers

    What might cause the tower basin or sump to overflow?

    <p>A clogged sump screen</p> Signup and view all the answers

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