Carbon Monoxide – Multiple Choice Questions

What is carbon monoxide (CO)?

• A flammable gas

• A colourless, odourless, poisonous gas

• A refrigerant

• A cleaning agent

How is carbon monoxide produced?

• By complete combustion of gas

• By incomplete combustion of carbon-based fuels

• By photosynthesis

• By water evaporation

Which of the following is NOT a symptom of CO poisoning?

• Headaches

• Dizziness

• Sneezing

• Nausea

Why is carbon monoxide especially dangerous?

• It smells like rotten eggs

• It cannot be seen, smelled, or tasted

• It causes fires

• It is cold

What should you do if you suspect CO is present?

• Light a match

• Open the oven

• Turn off the appliance and ventilate the area

• Close all windows

Which of the following is a common source of CO in homes?

• Electric heaters

• Faulty gas boilers

• LED lights

• Solar panels

What is the emergency number to call for gas leaks in the UK?

• 0800 999 111

• 0800 111 999

• 999

• 111

Which of the following is a visible sign of CO production?

• Blue flame

• Yellow or orange flame

• Clear windows

• No condensation

What does CO do to the human body?

• Helps with breathing

• Prevents oxygen from reaching cells

• Improves digestion

• Increases energy

Which appliance is least likely to produce CO?

• Gas fire

• Wood burner

• Electric oven

• Oil heater