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WorksheetsGas Fire Safety Quiz
Total questions: 29
Worksheet time: 15mins
What is the minimum size flue to which a radiant/convector gas fire may be fitted?
100mm across the axis of the flue.
125mm across the axis of the flue.
175mm across the axis of the flue.
225mm across the axis of the flue.
What are the ventilation requirements for a DFE fire (providing the manufacturer does not state otherwise)?
None required.
100cm² to be provided.
5cm² per kW (net) to be provided.
5cm² per kW (net) of the rated input in excess of 7kW.
What is the purpose of an atmosphere sensing device (ASD)?
To prevent the fire lighting unless the fan is running.
To control the primary air input.
To detect vitiated atmospheres and shut off the pilot.
To control the heat output of the fire.
In which of the following locations should an open flued gas fire not be installed?
Kitchen.
Bathroom.
Lounge.
Garage.
What is the minimum distance required between the burner of a gas fire or stove and a combustible side wall?
200mm.
300mm.
400mm.
500mm.
What is the minimum cross-sectional area of a pre-cast flue to which a radiant /convector gas fire is to be installed?
12,000mm².
13,500mm².
15,000mm².
16,500mm².
Closure plates for gas fires must be capable of maintaining a seal up to at least what temperature?
100°c.
125°c.
150°c.
175°c.
When installing DFE fires on to a hearth, what minimum distance above the floor should the hearth be positioned?
12mm
50mm
82mm
100mm
When testing for spillage on an open flued appliance you realise that there is an extraction fan in the connecting room. How would you proceed with the spillage test?
Close all doors and test after the appliance has heated up for 5 minutes.
Turn off the fan and open the door then test.
The fan is probably intermittent and therefore would not affect the performance of any flue because of its location.
Open the connecting door and turn the fan on then test.
A terminal guard is required to be installed to the terminal of a room sealed fanned draught appliance. The outlet is positioned within what height from the floor?
1.8m
2.0m
2.1m
2.5m
After the installation of a gas fire and associated gas supply, a tightness test is to be carried out. What pressure should an existing system be tightness tested to?
10mbar.
21mbar.
30mbar.
36mbar.
What is the theoretical operating efficiency of a flueless gas appliance?
35%.
50%.
70%.
100%.
What is the maximum angle of a flue canopy above a DFE gas fire?
25 degree.
35 degree.
45 degree.
55 degree.
What is the purpose of a flue terminal fitted to the flue outlet of a gas fire?
To increase flue velocity.
To reduce flue velocity.
To prevent debris entering the flue and appliance.
To prevent excess air entering the flue.
What is the minimum distance in which a flue terminal from a fanned draught room sealed appliance should be installed below an air brick?
150mm.
300mm.
350mm.
450mm.
Before installing an open flued radiant gas fire in a chimney previously used for an appliance burning solid fuel, the flue should be:
Lined.
Fitted with a terminal.
Tested using a smoke match.
Thoroughly swept.
What is the minimum distance which the hearth should project from the back of an ILFE fire into the room or space?
100mm.
150mm.
300mm.
450mm.
Which of the following would not be a cause of a newly installed gas fire spilling?
Incorrect use of flue spigot.
Inadequate or incorrect ventilation.
Faulty atmosphere sensing device.
Incorrectly installed flue.
When commissioning a flueless gas space heater, what is the maximum allowable CO/CO₂ ratio?
0.001
0.008
0.010
0.020
When installing gas pipework to a gas fire, which of the following fitting types should not be used in an inaccessible location?
Capillary end feed
Compression
Capillary integral solder ring
Screwed BSP joint
What is the minimum clearance required above a gas fire to a non-combustible ceiling?
500mm.
600mm.
300mm.
400mm.
Which type of gas fire requires a permanent ventilation opening to the outside?
Room sealed gas fire.
Open flued gas fire.
Flueless gas fire.
Balanced flue gas fire.
What is the maximum allowable length for a flue pipe connecting a gas fire to a chimney?
4 meters.
3 meters.
2 meters.
1 meter.
What is the minimum height above ground level for a flue terminal of a balanced flue gas fire?
300mm.
600mm.
1000mm.
1500mm.
Which material is not suitable for use in the construction of a gas fire flue?
Stainless steel.
Aluminum.
Concrete.
Plastic.
What is the maximum allowable length for a flexible flue liner used with a gas fire?
12 meters.
5 meters.
8 meters.
10 meters.
What is the minimum distance required between a gas fire and a combustible floor covering?
200mm.
100mm.
250mm.
150mm.
Which of the following is a requirement for the installation of a flueless gas fire in a living room?
Connection to a chimney.
Installation of a carbon monoxide detector.
Use of a flexible flue liner.
Installation of a terminal guard.
What is the primary function of a draught diverter in a gas fire installation?
To stabilize the flue draught.
To prevent backflow of gases into the room.
To increase the heat output of the fire.
To reduce noise from the flue.
