Phase 4 Unit 303: Combustion Burner 1

What is the primary focus of Unit 303 in the Level 3 Diploma in Gas Engineering?

• Combustion and properties of gas

• Electrical circuits

• Plumbing basics

• Renewable energy sources

What is the part of the appliance on which the flame stabilizes?

• Burner

• Boiler

• Cooker

• Water heater

What is the role of the outer mantel in a pre-aerated flame?

• To protect the flame

• To supply fuel

• To maintain the flame's shape

• To cool the flame

Which type of flame is generally only used in living flame effect gas fires?

• Pre-aerated flame

• Post-aerated flame

• Blue flame

• Non-luminous flame

Gas/Air faster than flame speed results in what?

• Flame lift

• Light back

• Stable flame

• Extinguished flame

What is the role of the injector in the burner system?

• To inject gas into the mixing tube

• To cool the flame

• To stabilize the flame

• To measure flame speed

The friction caused by the gas/air mixture occurs along which part of the burner?

• The edge of the mixing tube

• The burner head

• The gas inlet

• The flame front.

The flame front is located at which part of the burner?

• Where the gas leaves the ports

• Where the gas is injected

• Where the flame ends

• Where the air is mixed.

The gas flame is located at which part of the burner system?

• After the flame front

• Before the mixing tube

• At the gas inlet

• At the injector.

What are the two types of ports incorporated in most pre-aerated burners?

• Main and retention ports

• Primary and secondary ports

• Inlet and outlet ports

• Gas and air ports.