WorksheetsGas Safety and CO Investigation Quiz
Total questions: 15
Worksheet time: 8mins
A gas user has contacted you stating that a carbon monoxide (CO) detector has been activated within their property. What advice should you provide?
Contact the gas emergency service provider and turn off gas appliances and the gas supply, open windows, do not operate any electrical switches, do not smoke or use any naked flames.
Turn off gas appliances and the gas supply, open windows, do not operate any electrical switches, do not smoke or use any naked flames and await your attendance.
Contact the gas emergency service provider and ventilate your property to release any suspected build-up of gas or fumes.
Contact the gas emergency service provider and open windows, do not operate any electrical switches, do not smoke or use any naked flames.
Which of the following ACS gas qualifications provide gas engineers with the required competencies to undertake gas fumes investigations?
CPA1.
CMDDA3.
CMDDA1.
CPAB1.
Portable combustion gas analysers must conform to what standards?
BS EN 50356-5.
BS EN 50279-3.
BS EN 50378-3.
BS EN 50379-3.
Following activation of a CO alarm, it is recommended that?
Safety advice is given to the building occupier and the procedure carried out in accordance with BS7967.
Safety advice is given to the building occupier and the procedure carried out in accordance with BS7667.
The building occupier notifies a Gas Safe registered engineer.
The gas provider is contacted immediately to isolate the gas supply to the building.
Prior to using a portable combustion gas analyser to sample, the user must ensure:
That the combustion gas analyser has been calibrated within the room where the sample is to be carried out.
That the combustion gas analyser is calibrated in fresh air, in accordance with the manufacturer’s instructions.
That the combustion gas analyser has been calibrated within the flue system of the gas appliance to be sampled.
That the combustion gas analyser pre-sampling moisture filter has been removed.
What description best describes the systematic approach to responding to the reports of a CO detector activation?
Initial consultation, inspection of all suspect appliances and preparation of the report.
Initial consultation, inspection of all suspect appliances, review findings and preparation of the report.
Assessment of evidence, inspection of all operational appliances, review findings and preparation of the report.
Initial consultation, assessment of evidence, inspection of all suspect appliances, review findings and preparation of the report.
What description best describes your initial actions when attending the property?
While discussing the reported problem, use a combustion gas analyser to sample around head height and if CO levels exceed 50ppm, evacuate the property.
While discussing the reported problem, use a combustion gas analyser to sample around head height and if CO2 levels exceed 30ppm, evacuate the property.
While discussing the reported problem, use a combustion gas analyser to sample around head height and if CO levels exceed 30ppm, evacuate the property.
While discussing the reported problem, use a combustion gas analyser to sample around head height and if CO/CO2 ratio exceeds 0.008, evacuate the property.
What description best describes your actions having commenced the initial investigation at the property?
Carry out checks of all gas appliances within the property in accordance with the gas regulation 26(9) to identify suspect appliances.
Carry out checks of all gas appliances within the property in accordance with the gas regulation 29(6) to identify suspect appliances.
Carry out checks of all gas appliances within the property in accordance with the gas regulation 36(9) to identify suspect appliances.
Carry out checks of all gas appliances within the property in accordance with the British standards to identify suspect appliances.
What description best describes your actions when performing a room CO analysis?
Position analyser sampling probe approximately 2m from the floor and 1m from the appliance. Turn on the appliance, carry out a spillage test (where required) and sample the atmosphere for a rise in CO levels.
Turn on the appliance, carry out a spillage test (where required) and sample the atmosphere for a rise in CO levels.
Position analyser sampling probe approximately 3m from the floor and 1.5m from the appliance. Turn on the appliance, carry out a spillage test (where required) and sample the atmosphere for a rise in CO levels.
Position analyser sampling probe approximately 2m from the floor and 1m from the appliance. Turn on the appliance, carry out a spillage test (where required) and sample the atmosphere for a rise in CO levels.
Following completion of a room CO analysis, what action should be carried out?
Perform a combustion test of the suspect appliances and record results.
Perform a combustion test of the suspect appliances, record and respond to appliances where action levels are exceeded in accordance with the Gas Industry Unsafe Situations Procedure.
Perform a flue flow test of the suspect appliances, record and respond to appliances where action levels are exceeded in accordance with the Gas Industry Unsafe Situations Procedure.
Perform a gas rate check on the suspect appliances, record and respond to appliances where action levels are exceeded in accordance with the Gas Industry Unsafe Situations Procedure.
The correct CO/CO2 combustion ratio action level for a central heating boiler is:
0.008.
0.001.
0.08.
8.00.
When an open flued appliance exceeds an ‘action level’ how should a gas engineer respond?
The appliance should be categorised as ‘Not to current standards’ in accordance with the Gas Industry Unsafe Situations Procedure.
The appliance should be categorised as ‘At Risk’ in accordance with the Gas Industry Unsafe Situations Procedure.
The appliance should be categorised as ‘Immediately Dangerous’ in accordance with the Gas Industry Unsafe Situations Procedure.
The appliance should be notified via RIDDOR in accordance with the Gas Industry Unsafe Situations Procedure.
During a room atmosphere test, low levels of CO are detected within the room, albeit the only gas appliance within the property is a room sealed boiler that appears to be working correctly. What could potentially be the cause?
The CO levels could be caused by migration from adjoining buildings or from high levels of traffic outside the property.
Low levels of CO are acceptable from certain types of gas appliances.
The CO levels could be caused by a natural gas escape within the property.
The presence of CO could come from radon gas, present within the area.
A combustion analyser can be used to determine CO and CO2 in combustion products from which of the following types of gas fired appliances (select all those that apply)?
Flueless appliances (type A appliances), e.g. cooking appliances, space heaters.
Open flue appliances (type B appliances).
Room sealed appliances (type C appliances).
Vertex flues.
Information relating to the ventilation methods for gas appliances can be found in which of the following?
BS5440:2.
BS5441:1.
Building Regulation Part G.
Gas ACOP Regulation 3.
