CENWAT Safety Devices and Regulations 2

Question 1

Under Building Regulations, what is the requirement for carbon monoxide alarms when installing a new or replacement gas boiler?

Accepted Answer

A CO alarm must be fitted in the same room as the boiler

Answer

CO alarms are recommended but not required

Answer

CO alarms are only required in bedrooms

Answer

CO alarms are only required for oil-fired boilers

Question 2

What is the safe procedure for purging air from a gas installation before commissioning?

Accepted Answer

Open all downstream appliance valves and purge at a suitable point, ensuring adequate ventilation

Answer

Light a match at the burner while slowly turning on the gas

Answer

Simply turn on the boiler and let it self-purge

Answer

There is no need to purge a new gas installation

Question 3

What is the maximum permissible CO/CO2 ratio from a natural gas appliance measured during combustion analysis?

Accepted Answer

0.008

Answer

0.002

Answer

0.004

Answer

0.012

Question 4

What does a spillage test check for when commissioning an open-flued gas appliance?

Accepted Answer

Whether combustion products are spilling from the draught diverter into the room

Answer

Water spilling from the condensate pipe

Answer

Gas leaking from the pipework

Answer

Overflow on the feed and expansion cistern

Question 5

What is the required clearance for a conventional open-flue terminal above the roof penetration point?

Accepted Answer

At least 600mm above the roof penetration point

Answer

Level with the ridge

Answer

300mm above the roofline

Answer

No specific requirement

Question 6

What is the engineer obligation under Gas Safe Register requirements regarding reporting of Immediately Dangerous situations?

Accepted Answer

The engineer must report any Immediately Dangerous situation to Gas Safe Register within 28 days

Answer

No notification is required, only the customer needs to be informed

Answer

Only fatalities need to be reported

Answer

Only situations involving carbon monoxide poisoning need reporting