CO & CO2 sampling

Guidance to help gas operatives investigate situations like CO alarm activation can be found in which BS?

• BS 6891

• BS 5440

• BS 7967

• BS 6448

Which gas families are covered by these standards?

• 1st

• 2nd

• 3rd

• All

In the context of this section a gas incident is where it is known or suspected that exposure to CO has resulted in a person(s) losing _____________ __ ______ _____ _______ ________ _______ ________ __ _____. It is imperative where a gas operative attends a gas related incident that they ensure minimum disturbance of the incident scene and, where safe to do so, the gas supply to the installation is isolated with the premises adequately ventilated.

Because CO has a density close to that of air, how does it start to distribute itself?

Industry regulations specify that CO levels within a room must not exceed what?

• 100ppm

• 10ppm

• 1000ppm

• 20ppm

How much CO2 in a room can affect the combustion process?

• 5-7%

• 2-10%

• 1.5-2%

• 10-12%

What level of CO in the atmosphere will warrant immediate evacuation of the premises?

• 30ppm

• 50ppm

• 75ppm

• 100ppm

List 3 examples of when an appliance may be suspected to have a combustion issue.

BS 7927 was superseded by which standard?

• BS 6448

• BS 8921

• BS 6891

• BS EN 50379

Analysers conforming to BS 8494 are specifically designed for what?

• Combustion analysis

• Measuring concentrations of CO2 in indoor ambient air

• Both of the above

• Measuring oxygen levels