Two numbers multiplied together resulting in a product, i.e. 2 x 3 = 6 (2 and 3 are factors).

The ratio of ultimate strength to allowable stress. It is used to ensure that a structural member is not subjected to excessive loads that would cause it to fail or not be able to perform the job it was designed for.

A temperature scale with graduations divided into 212 equal parts (Imperial/English system).

Any device that either shuts down or prevents the start of a machine or system when there is a drop or loss of pressure, flow or level, etc.

A machine that causes energy to be added to air or other vapours to increase its pressure or velocity.

Valves installed at the outlet connections of fixtures such as sinks, that are used to control the flow of water.

Fluidized Bed Combustion.

The part of a closed loop system which provides the controller with information about the controlled variable for comparison to its desired value

Treated water that is supplied to the boiler to replace the boiler water that has been converted to steam and has been removed from the boiler.

Material that contains magnetic domains that are relatively easily aligned to produce magnets. Ferromagnetic materials are iron, steel, cobalt, and alnico.

A metal, the major component of which is iron.

A device installed in a liquid or gas flow used to remove particulate matter.

The device that directly changes the value of the manipulated variable.

Refers to the tubes of fire tube boilers through which combustion gases flow.

A boiler consisting of drum containing tubes through which hot combustion gases pass.