Boiler Plant Startup Procedures
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Questions and Answers

What is the purpose of coating some gaskets with a graphite paste?

  • To increase their resistance to high temperatures
  • To prevent corrosion from forming on the gasket surface
  • To improve their sealing performance
  • To make them easier to remove during the next boiler shutdown (correct)
  • Why is it important to slowly dry out new refractory before raising the furnace to normal operating temperature?

  • To improve the insulation properties of the refractory
  • To minimize the risk of thermal shock during operation
  • To reduce the risk of chemical reactions within the refractory
  • To prevent the formation of internal pressure in the refractory (correct)
  • What is the purpose of performing a boil out on a new boiler?

  • To increase the overall efficiency of the boiler
  • To remove mineral deposits from the internal surfaces
  • To adjust the water level control mechanisms
  • To remove grease, welding debris, dirt, and oil from construction (correct)
  • When should safety valves be tested for operation on a new or restarted boiler?

    <p>During the initial firing of the boiler</p> Signup and view all the answers

    Why is it recommended to perform a dry run of combustion controls before placing the fuel and air systems into service?

    <p>To ensure proper operation and coordination of various components in the control system</p> Signup and view all the answers

    What should be done when testing safety valves as the steam pressure rises in a new or restarted boiler?

    <p>Try lever test and pop test</p> Signup and view all the answers

    What is the purpose of inspecting the boiler internally before closing it up?

    <p>To check for scale, oil, tools, debris, and other foreign material</p> Signup and view all the answers

    Why is it important to check off all tools that have been taken into a water tube of a watertube boiler?

    <p>To ensure that nothing has fallen into a water tube</p> Signup and view all the answers

    What should be done with work permits before proceeding to close up the boiler?

    <p>They should be surrendered</p> Signup and view all the answers

    What must be checked before closing up the boiler after furnace refractory work has been done?

    <p>All debris has been removed from inside the boiler</p> Signup and view all the answers

    Why is it necessary to ensure that all lockout tags have been returned before closing up the boiler?

    <p>To ensure safety by preventing accidental operation</p> Signup and view all the answers

    What is the purpose of performing operational testing on all safety and control devices when starting a boiler plant after a major outage?

    <p>To ensure the safety and control devices are functioning correctly</p> Signup and view all the answers

    What should be at minimum position during the low fire start period?

    <p>Main burner firing rate control valve</p> Signup and view all the answers

    What occurs if a safety shutdown and lockout occurs within 4 seconds during the pilot trial for ignition period?

    <p>Burner management system displays zero flame signal</p> Signup and view all the answers

    What should be observed after successfully completing two cycles of testing and restarting the boiler following the post-purge period?

    <p>The main burner safety shut-off valves open</p> Signup and view all the answers

    When should the low water cut-off test be run?

    <p>Prior to firing to prove it functions as a permissive</p> Signup and view all the answers

    What does the high steam pressure cut-out test prove?

    <p>The boiler will trip once the high steam pressure set point has been reached</p> Signup and view all the answers

    What is the purpose of the low water flow cut-off test for forced-flow hot water boilers?

    <p>To prove that the boiler will trip when the hot water flow is inadequate to protect the boiler against overheating</p> Signup and view all the answers

    What does the combustion air proving switch test for mechanical draft boilers prove?

    <p>The boiler will trip upon loss of a fan</p> Signup and view all the answers

    What do flame detection devices monitor for in the boiler furnace?

    <p><strong>Flame</strong> in the boiler furnace</p> Signup and view all the answers

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