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Oil Burner Types and Operation Flashcards

6 cards from real OFTEC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the purpose of the oil burner nozzle's spray pattern?

    Answer: To create a specific cone of atomised oil for efficient mixing with air

    The nozzle spray pattern (hollow, solid, or semi-solid cone) determines how the atomised oil mixes with the combustion air. The correct pattern must match the combustion chamber design for clean, efficient burning.

  2. Which component in a pressure jet burner creates the spark to ignite the oil?

    Answer: Ignition electrodes connected to a transformer

    Ignition electrodes, powered by a high-voltage transformer (typically 10,000V), create a spark across a gap to ignite the atomised oil spray. The electrode gap and position are critical for reliable ignition.

  3. What is the function of the blast tube in a pressure jet oil burner?

    Answer: To direct and shape the airflow into the combustion chamber

    The blast tube channels combustion air from the fan into the combustion chamber in a controlled pattern. It also houses the nozzle assembly and electrodes, directing the fuel-air mixture for optimal combustion.

  4. How often should a domestic oil burner be serviced according to OFTEC guidelines?

    Answer: Annually

    OFTEC recommends annual servicing for all domestic oil-fired appliances. Regular servicing ensures safe operation, maintains efficiency, and can identify potential problems before they become dangerous.

  5. What happens if the nozzle in a pressure jet burner becomes partially blocked?

    Answer: Poor atomisation leading to incomplete combustion and sooting

    A partially blocked nozzle disrupts the spray pattern, causing poor atomisation. This leads to incomplete combustion, excessive soot production, reduced efficiency, and potentially dangerous carbon monoxide production.

  6. Which type of oil burner is most commonly installed in UK domestic properties?

    Answer: Pressure jet burner

    Pressure jet burners dominate the UK domestic market due to their reliability, efficiency, and ability to handle varying heat demands. Vaporising burners are now rarely installed in new systems.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. bpec.org.uk — Retake policy · verified Oct 2026
  2. oftec.org — Fees, renewal, eligibility, exam format, score validity, test delivery · verified Oct 2026