OIL HEAT 1 NORA SILVER EXAM (ACTUAL 2025/2026)
QUESTIONS & VERIFIED ANSWERS
Cloud Point - --Answers---The temperature below which diesel or biodiesel appear cloudy owing to the formation of small crystals. The presence of these crystals thickens the fuel and clogs filters and injectors, typically 10-20 degrees above the pour point.
List 4 Factors of Fuel Degradation - --Answers---1. Chemistry of the fuel
- Microbiological effects
3. Tank & Environment: moisture, fuel circulation
- Lack of maintenance and poor design/install, improper/no filtration,
lack of corrosion protection.
Sludge - --Answers---Combination of water, colonies of bacteria, degraded fuel and other contaminants like sand, grit and rust.
Flash Point - --Answers---Maximum temperature #2 fuel oil can be safely stored and handled WITHOUT serious fire hazard.Ch 1 High Pressure Atomizing - --Answers---100+ PSI fuel pump forces oil through a nozel to break (atomize) the oil into small droplets thst are vaporized abd burned in suspension in the combustion area. Electrodes close to the nozzle supplies heat for ignition and a fan supplies the air needed for combustion.
- / 1