CCN1 Gas Emergency Procedures 2

Question 1

What is a 'gas incident' that a Gas Safe engineer is required to report to the HSE?

Accepted Answer

Any death, injury, or near miss attributable to a gas fitting or appliance, including CO poisoning incidents

Answer

Gas Safe engineers are required to report to the HSE any incident involving death, injury, or dangerous occurrence attributable to a gas fitting or appliance, including CO poisoning. This is required under RIDDOR (Reporting of Injuries, Diseases and Dangerous Occurrences Regulations).

Question 2

What is the significance of CO (carbon monoxide) in the context of gas emergencies?

Accepted Answer

CO is colourless and odourless, highly toxic even in small concentrations, and can rapidly cause loss of consciousness and death

Answer

CO is colourless and odourless, making it undetectable without a CO alarm. It combines with haemoglobin in the blood far more readily than oxygen, rapidly causing incapacitation and death even at relatively low concentrations.

Question 3

What are the recommended actions for a Gas Safe engineer if they detect high CO levels in a property?

Accepted Answer

Evacuate the occupants immediately, ventilate, call 999 if anyone is affected, and do not restore gas until the source is identified and repaired

Answer

High CO levels require immediate evacuation of all occupants, ventilation of the property, calling 999 if anyone shows symptoms (headache, nausea, dizziness), and not restoring gas until the source is identified and remedied.

Question 4

What is the purpose of a CO alarm in a domestic property?

Accepted Answer

To provide early warning of CO accumulation before dangerous concentrations are reached, allowing occupants to evacuate

Answer

CO alarms provide an audible warning when CO concentrations rise, giving occupants time to evacuate before reaching dangerous levels. They are the only way to detect CO, which has no smell or colour.

Question 5

If a Gas Safe engineer arrives at a property and finds a CO alarm sounding, what is the correct immediate action?

Accepted Answer

Evacuate occupants, ventilate the property, do not operate any electrical switches, and call 999 if anyone shows symptoms

Answer

A sounding CO alarm must be treated as a real emergency. Evacuate all occupants, ventilate, avoid electrical switches, and call 999 if anyone is symptomatic. Do not waste time checking whether the alarm is genuine before evacuating.

ACS CCN1 Practice Test

ACS CCN1 Practice Test

CCN1 Gas Emergency Procedures 2