Flues and Chimneys Quiz P3L3,U11,LO3,AC3.1.

What is the main function of a flue or chimney?

• To store fuel for combustion

• To cool down the combustion products

• To remove the products of combustion safely to atmosphere away from the building

• To provide heat to the building

How do flues and chimneys work based on the principle of hot flue gases?

• Hot flue gases are heavier than air

• Hot flue gases rise because they are lighter than air

• Hot flue gases create a vacuum inside the chimney

• Hot flue gases have no effect on the chimney

What term is used for the effect that sets in motion a cycle to remove the products of combustion and draw in fresh combustion air?

• Pressure difference

• Pull

• Combustion cycle

• Downward force

What is the relationship between the temperature of flue gases and the 'pull' of the flue?

• The temperature of flue gases has no effect on the 'pull' of the flue

• The hotter the flue gases, the weaker the 'pull' of the flue

• The cooler the flue gases, the greater the 'pull' of the flue

• The hotter the flue gases, the greater the 'pull' of the flue

What is the potential issue with a flue that is too tall?

• It will have no effect on the 'pull' of the flue

• It will increase the 'pull' of the flue

• It will cool down the flue gases and create condensation

• It will decrease the 'pull' of the flue