NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam

What is the principal difference between a steam heating boiler and a hot-water heating boiler?

Steam boilers deliver heat as vapor at or above atmospheric boiling; hot-water boilers circulate liquid water below boiling. Hot-water boilers must operate above 15 psi steam. Steam boilers never require a safety valve. Hot-water boilers cannot use radiators or convectors.

Correct Answer:

Steam boilers deliver heat as vapor at or above atmospheric boiling; hot-water boilers circulate liquid water below boiling.

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