A ___ is a burner accessory that opens when energized by contacts in the programmer to allow fuel oil to flow to a burner nozzle.

A ___ is a burner accessory that opens when energized by contacts in the programmer to allow fuel oil to flow to a burner nozzle.

A boiler must be taken off-line before it can be inspected.

A manhole cover can weigh more than 50 lb, and significant injury and/or damage can occur if it is rapidly pulled in by ___ inside the boiler during removal.

A manhole cover can weigh more than 50 lb, and significant injury and/or damage can occur if it is rapidly pulled in by ___ inside the boiler during removal.

Foaming causes corrosion of heat transfer surfaces.

Foaming causes corrosion of heat transfer surfaces.

Under all circumstances, electrical equipment should never be de-energized before maintenance work is performed.

In low pressure steam boilers, the lowest visible part of the gauge glass must be placed a minimum of 1″ above the lowest permissible water level.

If the stack height is over ___’ or if an extremely large breeching and stack combination causes excessive draft, a damper can be located in the breeching close to the stack.