- Study guides, Class notes & Summaries

for the purpose of rating boiler horsepower for an Engineers licence only, how many square feet of boiler surface shall be equivalent to one boiler horsepower on a boiler? - correct answer 10 Sq. Ft. Heating Surface What is meant by the term Low Pressure Boiler? - correct answer boilers operating at a steam or other vapor pressure of 15 psig. or less, or a hot water or other liquid boiler in which the pressure does not exceed 160 psig. Or a temperature of 250 f°. A person holding a curren...