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NORA Bronze Test Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the primary function of a combustion chamber in an oil burner?✔✔ To mix fuel and air for efficient burning
Why is it important to have proper draft in a chimney?✔✔ To ensure efficient removal of combustion gases
What role does a cad cell play in an oil burner system?✔✔ It detects the presence of a flame for safety control
Why should an oil filter be changed regularly?✔✔ To prevent clogs and ensure clean fuel reaches the burner
What can cause an oil burner to short-cycle?✔✔ A faulty thermostat or incorrect burner settings
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Why is it necessary to bleed an oil burner system after running out of fuel?✔✔ To remove air from the fuel lines for proper ignition
What is the purpose of a barometric damper in a venting system?✔✔ To regulate draft and improve combustion efficiency
How can a clogged nozzle affect an oil burner’s performance?✔✔ It can cause poor atomization and inefficient combustion
What safety device shuts off the oil supply if a flame is not detected?✔✔ The primary control
Why is preheating oil sometimes necessary in cold climates?✔✔ To improve fuel flow and atomization
How does a pump strainer help maintain burner efficiency?✔✔ By filtering debris before it reaches the nozzle
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What is one sign of excessive air in an oil burner flame?✔✔ A bright, noisy, unstable flame
Why is it important to set the correct electrode gap in an oil burner?✔✔ To ensure reliable ignition of the fuel
What happens if too much air is supplied to the combustion process?✔✔ The flame becomes weak, and efficiency decreases
What is the function of a pressure relief valve in an oil system?✔✔ To prevent excessive pressure buildup and potential damage
How does a dirty heat exchanger affect system performance?✔✔ It reduces heat transfer efficiency and increases fuel consumption
What is a common cause of soot buildup in an oil-fired heating system?✔✔ Improper air-to-fuel ratio or poor combustion
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