OFTEC Oil Burner Types and Operation

Question 1

Which type of oil burner atomises fuel by forcing it through a nozzle under high pressure?

Accepted Answer

Pressure jet burner

Answer

Vaporising burner

Answer

Rotary cup burner

Answer

Pot burner

Question 2

What is the typical fuel pump pressure for a domestic pressure jet oil burner?

Accepted Answer

7-10 bar

Answer

1-3 bar

Answer

15-20 bar

Answer

25-30 bar

Question 3

What grade of oil is most commonly used in UK domestic oil-fired heating systems?

Accepted Answer

28-second kerosene (Class C2)

Answer

35-second gas oil (Class D)

Answer

Light fuel oil (Class E)

Answer

Heavy fuel oil (Class G)

Question 4

What is the primary function of the photocell in a pressure jet oil burner?

Accepted Answer

To detect the presence of a flame

Answer

To ignite the fuel

Answer

To regulate fuel pressure

Answer

To control the fan speed

Question 5

In a vaporising burner, how is the oil prepared for combustion?

Accepted Answer

By heating it on a hot surface until it turns to vapour

Answer

By forcing it through a high-pressure nozzle

Answer

By spinning it off a rotating cup

Answer

By mixing it with compressed air in a venturi

Question 6

What does a lockout condition on an oil burner indicate?

Accepted Answer

The burner has failed to establish a flame and has shut down for safety

Answer

The thermostat has reached its set temperature

Answer

The fuel tank is full

Answer

The flue temperature is too high