CCN1 Unsafe Situations Procedure (RIDDOR)

Question 1

Under the Gas Industry Unsafe Situations Procedure (GIUSP), what classification is given to a gas installation that poses an immediate danger to life?

Accepted Answer

Immediately Dangerous (ID)

Answer

An Immediately Dangerous (ID) classification is given when a gas installation poses an immediate danger to life or property. When an engineer identifies an ID situation, they must disconnect or turn off the gas supply to the affected appliance immediately, attach a warning label, and advise the responsible person not to use the appliance.

Question 2

When a Gas Safe registered engineer classifies an appliance as 'At Risk' (AR), what action must they take?

Accepted Answer

Advise the responsible person of the risk and seek their permission to disconnect; if they refuse, cap off and label the appliance

Answer

For an At Risk (AR) classification, the engineer must advise the responsible person of the danger, recommend disconnection, and seek permission to isolate the appliance. If the responsible person refuses disconnection, the engineer must turn off the appliance, attach a warning label marked 'DO NOT USE', and confirm the situation in writing.

Question 3

RIDDOR stands for which of the following?

Accepted Answer

Reporting of Injuries, Diseases and Dangerous Occurrences Regulations

Answer

RIDDOR stands for the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 2013. Under RIDDOR, Gas Safe registered engineers have a legal duty to report any gas fitting or gas appliance that they consider to be dangerous to the extent that people could die, lose consciousness, or require hospital treatment.

Question 4

Under RIDDOR, who must a Gas Safe registered engineer report a dangerous gas fitting to?

Accepted Answer

The HSE (Health and Safety Executive) via the online RIDDOR reporting system

Answer

Under RIDDOR regulation 6(2), Gas Safe registered engineers must report any dangerous gas fitting to the HSE using the online reporting form at www.hse.gov.uk/riddor. The report must be made as soon as reasonably practicable. The gas transporter (e.g., National Gas Emergency Service) should also be notified if there is an immediate gas escape.

Question 5

An engineer discovers a gas boiler with a blocked flue that is spilling combustion products into the room. How should this be classified under GIUSP?

Accepted Answer

Immediately Dangerous (ID)

Answer

A blocked flue causing spillage of combustion products (including potentially lethal carbon monoxide) into the room is classified as Immediately Dangerous (ID). This poses a direct and immediate threat to life. The engineer must immediately turn off the appliance, disconnect it if necessary, attach a warning label, and advise the occupants of the danger.

ACS CCN1 Practice Test

ACS CCN1 Practice Test

CCN1 Unsafe Situations Procedure (RIDDOR)