Chimney/Flue phase 3

What are the two operating principles for any chimney or flue system?

• Heat the air and cool the combustion gases.

• Remove combustion products to the outside and draw in air for combustion.

• Filter the air and recycle the combustion gases.

• Produce electrical energy and heat water.

On what principle do chimney or flue systems work to create a pressure differential called 'updraft'?

• The freezing of hot gases.

• The condensation of hot gases.

• The rise of hot gases, creating a pressure difference through convection.

• The thermal expansion of cold air.

What is the basic concept of a chimney or flue system?

• To filter the air within a room

• To create an up draught to get rid of the fumes

• To heat the surrounding environment

• To circulate cold air

Which of the following is a type of flue design?

• Forced draught

• Natural draught

• Electrical draught

• Solar draught

What other flue design apart from natural draught can you identify?

• Room sealed

• closed vent

• Mechanical sealed

• Environmentally sealed

What is the simplest design of all flues that relies on heat rising to create the up draught?

• Forced draught flue

• Chimney flue

• Open flue

• Balanced flue

Open flues can be of which types?

• Natural draught or forced draught

• Electric draught or gas draught

• Indoor draught or outdoor draught

• Mechanical draught or manual draught

Where is the air for combustion taken from in an appliance with an open flue?

• From outside the building

• From the combustion chamber

• From the room in which the appliance is located

• From the secondary flue

How are the products of combustion removed in an appliance with an open flue?

• Through a vent in the room

• Up the flue by natural draught

• Directly outside through a side vent

• By a mechanical extractor

What must be supplied to the room and appliance from outside via a vent in an open flue system?

• Natural gas

• Electricity

• Air for combustion

• Water for cooling