WorksheetsPhase 4 Unit 303: Combustion Burner 1
Total questions: 14
Worksheet time: 7mins
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.
What is the flame speed of Propane?
0.36 m/sec
0.46 m/sec
0.56 m/sec
0.66 m/sec
In a venturi design, where is the primary air drawn in?
Through the burner head
Through the primary airport
Through the retention ports
Through the mixing tube
What is the purpose of the venturi in a gas burner?
To increase gas flow
To reduce air pressure
To entrain primary air
To control flame size
Atmospheric/natural draught appliances require ______ ventilation.
Fixed
Portable
Central
No
