1. definition of Power 230-233 Easy
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Questions and Answers

Which type of boiler is assembled in a factory and shipped complete with fuel burning equipment, mechanical draft equipment, and automatic controls and accessories?

  • Field-erected boiler
  • Mud drum
  • Packaged watertube boiler (correct)
  • Shop-assembled boiler

What is the main advantage of a packaged boiler?

  • Flexible capacity
  • Low cost (correct)
  • High efficiency
  • Compact design

What is the range of capacities for a packaged watertube boiler?

  • 10 000 kg to 100 000 kg of steam per hour
  • 1000 kg to 10 000 kg of steam per hour
  • 2300 kg to over 65 000 kg of steam per hour (correct)
  • 5000 kg to 50 000 kg of steam per hour

What is the operating pressure range for a packaged watertube boiler?

<p>Up to 1700 kPa, although they may reach over 6200 kPa in some cases (C)</p> Signup and view all the answers

What type of fan supplies the air for combustion in a packaged watertube boiler?

<p>Forced draft (FD) fan (A)</p> Signup and view all the answers

What covers the outside of the boiler and furnace in a packaged watertube boiler?

<p>Steel casing (B)</p> Signup and view all the answers

What is included in a packaged watertube boiler to support its bottom?

<p>Simple skid-type steel foundation (D)</p> Signup and view all the answers

Which of the following is a difference between shop-assembled boilers and packaged boilers?

<p>Shop-assembled boilers can be ordered 'off the shelf' (B)</p> Signup and view all the answers

Which of the following is true about field-erected watertube boilers?

<p>They are constructed on-site (A)</p> Signup and view all the answers

Which of the following is a method for calculating the output or rating of a boiler?

<p>All of the above (D)</p> Signup and view all the answers

What is the steam capacity of a boiler expressed in?

<p>Kilograms of steam per hour (A)</p> Signup and view all the answers

What is the main purpose of the refractory and outer casings in a shop-assembled boiler?

<p>To protect the boiler from external damage (C)</p> Signup and view all the answers

What is the purpose of the support structures in a field-erected watertube boiler?

<p>To hang the drums and headers in place (A)</p> Signup and view all the answers

What is the maximum continuous steam output of the field-erected watertube boiler shown in Figure 3?

<p>163 000 kg/h (C)</p> Signup and view all the answers

What fuels can be used in field-erected boilers?

<p>All of the above (C)</p> Signup and view all the answers

Which of the following is true about shop-assembled watertube boilers?

<p>They have water-cooled furnaces and forced draft fans (A)</p> Signup and view all the answers

What is the main purpose of the steel casing in a packaged watertube boiler?

<p>To prevent combustion gas leakage into the boiler room (B)</p> Signup and view all the answers

What is the range of operating pressures for packaged watertube boilers?

<p>Up to 6200 kPa (B)</p> Signup and view all the answers

What is the main advantage of field-erected watertube boilers?

<p>Lower shipping costs (C)</p> Signup and view all the answers

What is the purpose of the support structures in a field-erected watertube boiler?

<p>To provide structural support for the boiler (B)</p> Signup and view all the answers

What is the steam capacity of the shop-assembled boiler shown in Figure 2?

<p>100 000 kg/h (C)</p> Signup and view all the answers

What type of fan supplies the air for combustion in a packaged watertube boiler?

<p>Forced draft (FD) fan (D)</p> Signup and view all the answers

Which of the following is a characteristic of a shop-assembled boiler?

<p>The steam generating section is not fully assembled (A)</p> Signup and view all the answers

What is the main purpose of field-erected boilers?

<p>To be assembled on-site due to their large size (B)</p> Signup and view all the answers

What is the main advantage of a field-erected boiler?

<p>They can be constructed in the manufacturers plant and then shipped to the site for assembly (A)</p> Signup and view all the answers

What is the maximum continuous steam output of the field-erected watertube boiler shown in Figure 3?

<p>163 000 kg/h (C)</p> Signup and view all the answers

What is the purpose of the refractory and outer casings in a shop-assembled boiler?

<p>To provide insulation and cover the outside of the boiler and furnace (D)</p> Signup and view all the answers

What is the purpose of the support structures in a field-erected watertube boiler?

<p>To provide support for the refractory and outer casings (D)</p> Signup and view all the answers

What is the range of capacities for a field-erected watertube boiler?

<p>150 000 kg/h or more (B)</p> Signup and view all the answers

What is the main purpose of the refractory and insulation in a field-erected watertube boiler?

<p>To provide insulation and cover the outside of the boiler and furnace (D)</p> Signup and view all the answers

Which of the following is true about packaged watertube boilers?

<p>They have water-cooled furnaces (A)</p> Signup and view all the answers

What is the purpose of the steel casing in a packaged watertube boiler?

<p>To prevent combustion gas leakage (A)</p> Signup and view all the answers

What is the main advantage of field-erected watertube boilers?

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

What is the purpose of the support structures in a field-erected watertube boiler?

<p>To provide support for the boiler (B)</p> Signup and view all the answers

What is the range of capacities for a shop-assembled watertube boiler?

<p>100 000 kg/h (A)</p> Signup and view all the answers

What is the purpose of the refractory and insulation in a field-erected watertube boiler?

<p>To cool the furnace (B)</p> Signup and view all the answers

What is the range of operating pressures for packaged watertube boilers?

<p>Up to 1700 kPa (D)</p> Signup and view all the answers

Which of the following is true about shop-assembled watertube boilers?

<p>They are generally smaller in size compared to packaged boilers (B)</p> Signup and view all the answers

What is the main advantage of field-erected watertube boilers?

<p>They can be transported to the site in one piece (C)</p> Signup and view all the answers

What is the purpose of the support structures in a field-erected watertube boiler?

<p>To hang the drums and headers in place (A)</p> Signup and view all the answers

What is the range of capacities for a field-erected watertube boiler?

<p>Up to 163 000 kg/h of steam (B)</p> Signup and view all the answers

What is the main purpose of the refractory and outer casings in a shop-assembled boiler?

<p>To provide insulation and protect the boiler components (B)</p> Signup and view all the answers

What is the range of operating pressures for packaged watertube boilers?

<p>Up to 6550 kPa (D)</p> Signup and view all the answers

What is the maximum continuous steam output of the field-erected watertube boiler shown in Figure 3?

<p>163 000 kg/h (A)</p> Signup and view all the answers

What is the main advantage of a packaged boiler?

<p>They can be ordered 'off the shelf' (A)</p> Signup and view all the answers

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