ECCB 303 Exam 3 Questions and Answers | Updated 2026 | Graded A+

ECCB 303 Exam 3 Questions and Answers | Updated 2026 | Graded A+ Combustion - answer-a chemical chain reaction between fuel and O2 that is initiated by and releases heat fire fundamentals triangle - answer-three requirement for fir O2 Heat Fuel fuel - answer-plant biomass organic (carbon-based) compounds produced through photosynthesis light(energy) + 6CO2 (low energy carbon (oxidized C)) + 6H2O - C6H12O6 (high energy carbon (reduced C)/ Glucose/sugar) + 6O2 - answerglucose - answercellulose(glucose polymer) - answer-most abundant compound in wildland fuel oxygen - answer-electron acceptor in combustion reaction O2 21% of atm N2 78% Argon 0.93%CO2 0.04% O2 - answer-21% of atm N2 - answer-78% Argon - answer-0.93% CO2 - answer-0.04% 426 ppm in 2024 (280 ppm pre-industrial) Heat - answer-energy transfer due to a difference in temp. Convection (energy transfer) - answer-transfer of energy via fluid movement (liquid/gas) includes flame contact and circulation of heated air Radiation (energy transfer) - answer-transfer of energy via UV, visible, and infrared light conduction (energy transfer) - answer-transfer of energy through solid matter preignition - answer-three processes in preparation for combustion endothermic - answer-dehydration volatilization of extractives pyrolysis dehydration - answer-evaporation of water volatilization of extractives - answer-state change of solid/liquid to gas for lipids/fats, terpenes, waxesinvolves organic compounds that easily turn to gas pyrolysis - answer-thermal degradation of fuel produces: - volatiles and tars -char ("black carbon", C-dense) -mineral ash