NORA Oil Heat Exam 2025/2026 – 100+ Verified Questions & Answers on Combustion Air, Fuel Delivery, Burner Operation, Venting, Draft Control & System Troubleshooting

This exam-focused guide contains 100+ expertly verified questions and correct answers specifically tailored for the NORA Oil Heat Technician Certification Exam 2025/2026. It is designed for heating professionals preparing for national certification or state licensing, with clear, detailed content based on real-world oil heating systems, safety protocols, and combustion diagnostics. Topics covered in this document include: Oil burner operation & tuning: final combustion air adjustment, nozzle sizing, burner pressure, air shutter tuning, and post-purge logic Fuel delivery systems: oil line clogs, vacuum and lift calculations, deaerators, oil tank water contamination, bacterial growth risks Combustion and testing procedures: CO₂ test interpretation, smoke test timing, cad cell readings, draft regulator use, stack temperature management Venting and draft: barometric dampers, vent alarms, power venters, chimney blockages, positive breech draft causes Safety and controls: limit switches, thermostats with anticipators, fan/limit switches, pressuretrols, LWCO function Common system faults: dirty fan blades, overfiring conditions, air leaks in suction lines, after-drip in nozzle lines, pulsating flames, gelled oil tanks System components and definitions: ECM motors, DPDT switches, aquastats, circulator pump locations, thermostatic elements Fuel characteristics: B5 biofuel, flash point definitions, oxygen and CO₂ relationships, combustion efficiency indicators This guide is perfect for: Technicians preparing for the NORA Bronze or Silver Certification Exam HVAC students and apprentices specializing in oil heat Oil burner service professionals seeking exam preparation or knowledge refresh Installers and inspectors responsible for tuning and troubleshooting residential oil heat systems Heating contractors aiming for national compliance or insurance-mandated credentials All questions are formatted to match actual test conditions, with answers clearly marked and explained. This is a go-to study resource for mastering technical diagnostics, fuel handling, combustion efficiency, and system safety in oil heating. Keywords: NORA oil heat exam, combustion air adjustment, draft regulator, barometric damper, cad cell ohms, burner nozzle sizing, oil line suction, deaerator function, post purge timing, smoke test, Co2 reading, burner tuning, overfiring signs, thermostat anticipator, pressuretrol psi, LWCO safety, stack temperature, fuel oil gel, vent alarm, aquastat reverse acting, circulator placement, B5 biofuel, ECM motor, heating system troubleshooting