CCN1 Gas Appliance Installation and Commissioning 3

Question 1

What classification is given to a gas appliance that presents an immediate risk to life or property?

Accepted Answer

Immediately Dangerous (ID)

Answer

Not to Current Standards (NTCS)

Answer

At Risk (AR)

Answer

Unsafe for Use (UFU)

Question 2

When a gas appliance is classified as 'At Risk', what must the engineer provide before leaving the premises?

Accepted Answer

A written warning notice with the customer's acknowledgement

Answer

A verbal warning to the occupant only

Answer

An immediate notification to the Health and Safety Executive

Answer

A completed Gas Safe dangerous appliance report form

Question 3

Which Building Regulation Part specifically covers the installation of combustion appliances, including gas boilers, in England and Wales?

Accepted Answer

Part J — Combustion appliances and fuel storage systems

Answer

Part E — Sound insulation

Answer

Part L — Conservation of fuel and power

Answer

Part P — Electrical safety in dwellings

Question 4

What is the Landlord's Gas Safety Record (CP12) and when is it required?

Accepted Answer

An annual certificate confirming gas safety checks have been completed in rented properties

Answer

A document commissioning new gas appliances, required at installation

Answer

A record of all gas appliances installed in a property over its lifetime

Answer

A Gas Safe registration document confirming the engineer's qualifications

Question 5

What classification applies to a gas appliance that was correctly installed to the standards of the time but no longer meets current safety requirements?

Accepted Answer

Not to Current Standards (NTCS)

Answer

Immediately Dangerous (ID)

Answer

At Risk (AR)

Answer

Conditionally Safe (CS)

Question 6

Under the Gas Safety (Installation and Use) Regulations 1998, who is primarily responsible for notifying Gas Safe Register when an immediately dangerous gas fitting is identified?

Accepted Answer

The Gas Safe registered engineer who identified the fault

Answer

The property owner or landlord

Answer

The local gas network operator (e.g. National Gas)

Answer

The Health and Safety Executive (HSE)

Question 7

During commissioning of a new gas appliance, what test is performed to verify the flame failure device (FFD) is functioning correctly?

Accepted Answer

Extinguishing the pilot flame and confirming the gas shuts off within the specified time

Answer

Measuring the thermocouple output voltage with a multimeter

Answer

Checking the burner pressure with the FFD electromagnet removed

Answer

Measuring the gas flow rate through the FFD valve body