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Subjects · Leaving Cert Construction Studies

Leaving Cert Construction Studies: Chimneys & flues

How often Chimneys & flues comes up on the Construction Studies papers, every year it was asked, and questions to try.

HL Asked on 3 of the last 9 Higher Level papers, most recently in 2025.

OL Asked on 1 of the last 9 Ordinary Level papers, most recently in 2019.

June 2028 is the first exam on the new Construction Studies course. These come from the 2016–2025 papers, so read them as a guide.

Chimneys & flues, Higher Level(5 marks)

Quick ones on Chimneys & flues.

(a)Why fit a carbon monoxide alarm in a room with a stove?
  1. To detect smoke from cooking in the room
  2. CO is colourless, odourless and deadly
  3. To measure radon levels in the room
(b)Why does a warm, insulated flue draw better than a cold one?
  1. Cold flue gases are lighter than warm air
  2. Cold flues let more air in at the top
  3. Hot gases stay buoyant and rise faster
Show the answers

(a) CO is colourless, odourless and deadly

(b) Hot gases stay buoyant and rise faster

Your turn: Higher Level questions on Chimneys & flues.

Higher Level

Asked on 3 of the last 9 Higher Level papers, most recently in 2025.

Every paper, year by year

YearWhere it came up
2025Q7
2024Not asked
2023Not asked
2022Not asked
2021Q7
2019Not asked
2018Not asked
2017Not asked
2016Q7

Links open the State Examinations Commission’s paper for that year.

Ordinary Level

Asked on 1 of the last 9 Ordinary Level papers, most recently in 2019.

Every paper, year by year

YearWhere it came up
2025Not asked
2024Not asked
2023Not asked
2022Not asked
2021Not asked
2019Q8a
2018Not asked
2017Not asked
2016Not asked

Links open the State Examinations Commission’s paper for that year.

More Chimneys & flues questions

Chimneys & flues, 2 marks

What does a carbon monoxide alarm detect?

  1. Smoke from a fire starting in the living room
  2. Radon gas coming up from the ground
  3. A poisonous gas with no colour or smell
Show the answer

A poisonous gas with no colour or smell

Carbon monoxide comes from fuel burning without enough air. You cannot see or smell it, so an alarm is fitted in rooms with a stove, boiler or fire.

Chimneys & flues, 3 marks

Why does a wood stove stand on a non-combustible hearth?

  1. To stop the flue getting blocked with soot
  2. So heat and hot embers cannot set the floor alight
  3. So the stove draws in more air from below
Show the answer

So heat and hot embers cannot set the floor alight

A hearth of stone, tile or concrete protects the floor from the heat of the stove and from falling embers. The Building Regulations (TGD J) set its size.

Other Construction Studies topics

All of Leaving Cert Construction Studies