OFTEC Oil Burner Types and Operation 2

Question 1

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

Accepted Answer

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

Answer

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.

Question 2

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

Accepted Answer

Ignition electrodes connected to a transformer

Answer

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.

Question 3

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

Accepted Answer

To direct and shape the airflow into the combustion chamber

Answer

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.

Question 4

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

Accepted Answer

Annually

Answer

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.

Question 5

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

Accepted Answer

Poor atomisation leading to incomplete combustion and sooting

Answer

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.

OFTEC Practice Test

OFTEC Practice Test

OFTEC Oil Burner Types and Operation 2