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 (D)</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 (A)</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 (C)</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 (C)</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 (B)</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 (A)</p> Signup and view all the answers

What might cause the tower basin or sump to overflow?

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

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