Boiler Plant Startup Procedures

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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?

During the initial firing of the boiler 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?

To ensure proper operation and coordination of various components in the control system 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?

Try lever test and pop test Signup and view all the answers

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

To check for scale, oil, tools, debris, and other foreign material 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?

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

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

They should be surrendered Signup and view all the answers

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

All debris has been removed from inside the boiler Signup and view all the answers

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

To ensure safety by preventing accidental operation 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?

To ensure the safety and control devices are functioning correctly Signup and view all the answers

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

Main burner firing rate control valve 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?

Burner management system displays zero flame signal 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?

The main burner safety shut-off valves open Signup and view all the answers

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

Prior to firing to prove it functions as a permissive Signup and view all the answers

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

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

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

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

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

The boiler will trip upon loss of a fan Signup and view all the answers

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

Flame in the boiler furnace Signup and view all the answers