An electric spark igniter is a device located at a burner that uses a small piece of silicon nitride, which produces high temperatures when electric current passes through it.

Fuel oil characteristics include viscosity, pour point, flash point, fire point, volatility, and heating value.

The fire point temperature is higher than the flash point temperature.

The fire point temperature is higher than the flash point temperature.

Increased water surface tension on boiler water can lead to foaming, causing rapid fluctuations in water level.

The amount of natural draft produced increases with the height of a stack.

A globe valve should never be used as a main steam stop valve.

Surface impurities increase the surface tension in a blowdown line by creating a film which prevents ___ bubbles from breaking through the surface of the water.

Feedwater chemicals are mixed in the ___.

Low water fuel cutoffs must be ___ for proper performance.