Environmental Protection Operation Manual Quiz
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Questions and Answers

What is the main purpose of measures to prevent low-temperature corrosion in a furnace?

  • To increase the air leakage of the furnace wall
  • To reduce the surface temperature of the heated surface (correct)
  • To decrease the exhaust temperature
  • To increase the flue gas dew point

What is the continuous blowdown rate of a boiler generally in relation to the evaporation amount?

  • 7% (correct)
  • 1%
  • 5%
  • 3%

What is the purpose of regular soot blowing on the heating surface?

  • To reduce the wall temperature difference on the heating surface (correct)
  • To reduce the flue temperature
  • To reduce the temperature of the working fluid
  • To reduce the thermal resistance

What happens to the steam temperature when a boiler's steam pressure increases?

<p>Increases (C)</p> Signup and view all the answers

What is the main function of insulation materials used in boilers?

<p>To reduce heat loss (D)</p> Signup and view all the answers

What does preventing air leakage of the furnace wall help achieve with respect to low-temperature corrosion?

<p>Keep surface temperature below dew point (C)</p> Signup and view all the answers

What is the purpose of insulating pipes passing hot fluids?

<p>To reduce heat loss (B)</p> Signup and view all the answers

What happens when the oxygen content in deaerated feed water increases?

<p>The exhaust valve of the deaerator opens (C)</p> Signup and view all the answers

What is the function of the water seal ring of a condensate pump?

<p>To prevent water from leaking out of the pump (D)</p> Signup and view all the answers

Why should the water side pressure of the oil cooler be higher than the oil side pressure?

<p>To decrease heat transfer efficiency (D)</p> Signup and view all the answers

What is the role of a guide bracket in a pipeline system?

<p>To limit pipe displacement direction (C)</p> Signup and view all the answers

What is meant by thermal stresses in metal parts?

<p>Thermal stresses result from changes in metal temperature (C)</p> Signup and view all the answers

What is the height of the company's chimney according to the text?

<p>120 meters (A)</p> Signup and view all the answers

Which integrated process of dust removal does the company adopt?

<p>Ceramic filter tube (B)</p> Signup and view all the answers

What is the temperature range at which the flue gas reacts with the injected hydrated lime in the reaction tower?

<p>340-370°C (C)</p> Signup and view all the answers

Which substances react to generate calcium sulfate and water for sulfur dioxide removal?

<p>Sulfur dioxide (SO2) and calcium hydroxide (Ca(OH)2) (B)</p> Signup and view all the answers

What is injected into the back-end flue to react with nitrogen oxides (NOX) in the flue gas?

<p>Ammonia (NH3) (C)</p> Signup and view all the answers

What is one of the byproducts of the reaction between ammonia and nitrogen oxides for air pollution control?

<p>Ammonium nitrate (NH4NO3) (C)</p> Signup and view all the answers

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