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During normal operation, safety valves are designed to close quickly without chattering.

During normal operation, safety valves are designed to close quickly without chattering.

At sea level, a vacuum in a boiler results in a force of ___ lb applied on every square inch of surface.

A brick refractory should be cooled rapidly for energy efficiency.

Gear pumps are widely used positive-displacement pumps because of their simple design and ease of repair.

A boiler room contains many combustible materials, and boiler room fire safety requires established procedures to reduce or eliminate conditions that could cause a fire.

When an increase in steam pressure is required, the ___ activates the programmer to start a purge cycle and lights the pilot light.

A boiler room contains many combustible materials, and boiler room fire safety requires established procedures to reduce or eliminate conditions that could cause a fire.

Well-designed burners firing gaseous and liquid fuels operate at excess air levels of about ___% and result in negligible amounts of unburned fuel.

A(n) ___ is an air pressure-activated switch that closes after proving sufficient pressure of combustion air from the forced draft fan.