Which term describes the feature distinguishing steam boilers from hot-water boilers?

Which term describes the feature distinguishing steam boilers from hot-water boilers?

• A. Boiler jacket
• B. Boiler efficiency
• C. Boiler trim
• D. Boiler pressure

Answer: (C)

Boiler trim refers to the fittings and accessories that surround and regulate a boiler—valves, gauges, vents, blowdown equipment, feedwater connections, and safety devices. This set of components is what determines how the boiler is configured for its intended service. For steam boilers, the trim is arranged to handle steam generation and safety at pressure, including items like a steam pressure gauge or gauge glass, a steam stop valve, a properly rated pressure relief valve, feedwater regulation, and drain/blowdown arrangements. Hot-water boilers have trim configured for heating water rather than producing steam, so the specific devices and their arrangement differ. Because the trim directly reflects the operating medium and pressure the boiler is designed for, it best distinguishes steam boilers from hot-water boilers.

Boiler trim refers to the fittings and accessories that surround and regulate a boiler—valves, gauges, vents, blowdown equipment, feedwater connections, and safety devices. This set of components is what determines how the boiler is configured for its intended service. For steam boilers, the trim is arranged to handle steam generation and safety at pressure, including items like a steam pressure gauge or gauge glass, a steam stop valve, a properly rated pressure relief valve, feedwater regulation, and drain/blowdown arrangements. Hot-water boilers have trim configured for heating water rather than producing steam, so the specific devices and their arrangement differ. Because the trim directly reflects the operating medium and pressure the boiler is designed for, it best distinguishes steam boilers from hot-water boilers.