Worksheetsphase4,mod12.chimney
Total questions: 14
Worksheet time: 7mins
A Gas appliance with a natural draught open flue incorporating a draught diverter and natural draught burner would be catergorised as which type of appliance?
b11.
b14.
b21.
c11.
Which of the following open flues do not necessarily need a terminal fitted when a gas fire is to be installed?
A chimney with 225mm salt glaze lining.
A chimney with a 125mm Flexible flue liner.
A pre-cast Flue with 125mm twin wall flue termination.
A flue box with 150mm twin wall flue pipe.
When shall the fitting of a bird guard to a chimney be considered?
Where trees are close to the flue terminal.
Where no terminal is fitted.
Where the flue terminal is below two meters.
where there is known to be a problem of birds nesting
If a restrictor is found in the throat of a brick chimney when a gas fire is fitted:
It must be removed.
it must be permanently fixed in the open position.
The Fire must only be below 7kw.
A gas fire is not allowed with this type of flue.
A natural draught balanced flue of a 20kw boiler must terminate at least how far from the bottom of a openable window?
300mm.
600mm.
1200mm.
1500mm.
When double wall flue pipes are run externally ist is important, in order to prevent condensation, to ensure the fue lenght does not exceed:
12m.
20m.
28m.
33m.
The minimum cross sectional area of a new flue block system for a gas fire must be:
12000mm2 with no dimension less than 75mm.
12000mm2 with no dimension less than 90mm.
16500mm2 with no dimension less than 75mm.
16500mm2 with no dimension less than 90mm.
when a natural draught open flue terminates through a roof with an unobstructed pitch, the terminal must :
Be at least 600mm vertically from the roof.
Beat least 1000mm vertically from the roof.
Be at least 1000mm horizontally from the roof.
Be at least 1500mm horizontally from the roof.
Which of the following need not be incorporated into the design of appliances fitted to a shared open flue?
A draught Diverter.
A flame supervision device.
An atmosphere sensing device.
A pressure regulator.
Which of the following is not a function of the draught diverter of an open flue?
break the pull of the secondary flue,
Dilute products of combustion.
Prevent down draught.
Divert down draught.
When a natural draught open flue terminates above the ridge and 600mm horizontally of a pitched roof, the terminal must:
Extend at least to the ridge height.
Extend at least 300mm vertically above the ridge.
Extend at least 600mm vertically above the ridge.
Be at least 1500mm vertically above the ridge.
How many starter blocks should be installed on a pre cast flue system?
One.
Two.
Three.
Four.
A flexible flue liner must always be installed into a brick chimney when:
The gas fire is installed.
When a central heating appliance is installed.
When it is lined with cement only.
When the terminal is a GC1
Which of the following terminals is suitable for a decorative fuel effect fire.
