Nfi Exam Review Questions And Complete Answers Graded A+ 2024.

Combustibles {Ans: first step in planning}interior chimney location when possible prevents {Ans: cold hearth syndrome}creosote (more) {Ans: potentially hazardous byproduct of incomplete combustion in wood burning appliances from inadequate draft. In an unburnt state it is carcinogenic (cancer causing material)}Natural gas and propane {Ans: both colorless, odorless, and non-toxic}Aldehydes result from {Ans: flame impingement and through the presence of contaminated air}propane is heaver than {Ans: air, sinks and pools in low areas when released}