Gas Engineering

Typical symptoms of an adult suffering from carbon monoxide (CO) poisoning (exposed to a concentration of approximately 200 ppm) are:

• Severe headache and convulsions.

• Mild headache, dizziness and nausea.

• Severe sweating and strong light causes discomfort.

• Skin turning red with lighter patches, shivering and aching muscles.

When a gas user describes the symptoms of carbon monoxide (CO) poisoning if a carbon monoxide (CO) alarm has or has not activated, they should be instructed to:

• Have their gas appliances serviced.

• Take some medication and go to bed.

• Stay at home, keep warm and phone their doctor.

• Immediately go into the fresh air and seek medical attention.

BS EN 50291 requires that the alarm in a carbon monoxide (CO) detector exposed to a concentration of 100 ppm should:

• Sound within 6 minutes

• Not sound for at least 60 minutes.

• Sound between 10 and 40 minutes.

• Sound between 30 and 60 minutes and at 6 minute intervals.

Critical levels of carbon dioxide (CO₂) that could cause vitiation to affect the combustion process are:

• 0.5 - 1.0%

• 1.0 - 1.5%

• 1.5 - 2.0%

• 2.0 - 2.5%

Where spillage has been encountered that has resulted in a person’s loss of consciousness, it is imperative that the gas operative ascertains that the investigations of which body (in addition to the Health and Safety Executive (HSE) / Emergency Service Provider (ESP)) have been completed before they interfere with the installation?

• Gas Safe Register.

• The Gas Supplier.

• The Gas Transporter.

• The Appliance Manufacturer.

What is the minimum concentration of carbon monoxide (CO) in ppm that can cause symptoms of poisoning in humans?

• 200 ppm

• 100 ppm

• 400 ppm

• 50 ppm

According to safety standards, how often should carbon monoxide (CO) detectors be tested to ensure they are functioning properly?

• Once a year

• Every six months

• Every two years

• Once a month

Which of the following is a common source of carbon monoxide (CO) in homes?

• LED lights

• Gas stoves

• Electric heaters

• Solar panels