Author: Anonymous

Hot water boilers use ___ instead of the bottom blowdown valves used with steam boilers.

Hot water boilers use ___ instead of the bottom blowdown valves used with steam boilers.

The nonflammable material used to insulate the outer surface of a boiler from heat is ___.

The scales used on diaphragm gauges vary from hundredths of an inch to several inches of ___, depending on the pressure being measured.

The nonflammable material used to insulate the outer surface of a boiler from heat is ___.

The scales used on diaphragm gauges vary from hundredths of an inch to several inches of ___, depending on the pressure being measured.

In a system with a feedwater regulator, condensate returns through the condensate return line to the condensate return tank.

A mercury-tube pressure control is a pressure control that regulates a burner control circuit by the flow of mercury in a mercury tube.

A(n) ___ is a device worn over the ears to reduce the level of noise reaching the eardrum.

An automatic nonreturn valve is constructed of a piston in a cylinder with a stem and handwheel.