Gas Safe ACS - Accredited Certification Scheme Emergency Isolation Controls Questions and Answers

Question 1

According to the Gas Safety (Installation and Use) Regulations 1998, what is the primary requirement for the location of a domestic Emergency Control Valve (ECV)?

Accepted Answer

It must be in a readily accessible position for the gas consumer to use.

Answer

It must be located within 1 metre of the gas meter.

Answer

It must be installed externally in a locked meter box.

Answer

It must be positioned at least 600mm above floor level.

Question 2

An engineer is servicing a gas hob and needs to isolate it from the gas supply to work on it safely. Which of the following is the most appropriate first action, assuming the installation is compliant with modern standards?

Accepted Answer

Close the specific Appliance Isolation Valve (AIV) for the hob.

Answer

Shut off the gas supply at the Emergency Control Valve (ECV) by the meter.

Answer

Crimp and cut the gas pipe supplying the hob.

Answer

Contact the National Gas Emergency Service to shut off the supply in the street.

Question 3

During a landlord's gas safety inspection, an engineer finds that the Emergency Control Valve (ECV) has been completely boxed in behind a newly installed kitchen unit, with no access panel. According to the Gas Industry Unsafe Situations Procedure (GIUSP), how should this situation be classified?

Accepted Answer

At Risk (AR)

Answer

Not to Current Standards (NCS)

Answer

Immediately Dangerous (ID)

Answer

Requires Improvement (RI)

Question 4

You are called to a multi-occupancy building (block of flats) to carry out work in a specific flat. Which of the following statements regarding gas isolation for this type of property is most accurate?

Accepted Answer

Each individual flat must have its own identifiable and accessible Emergency Control Valve.

Answer

There will only be a single building emergency control valve in the plant room.

Answer

Isolating the gas supply is only possible for the entire building at once.

Answer

The appliance isolation valve for the boiler also serves as the flat's main ECV.

Question 5

Which of the following is a key requirement for labelling an Emergency Control Valve (ECV) according to UK gas industry standards?

Accepted Answer

The label must clearly indicate its purpose and the method of operation.

Answer

The label must display the engineer's Gas Safe registration number.

Answer

The label must be coloured red and yellow to signify danger.

Answer

The label must be made of metal and stamped with the installation date.

Question 6

Upon arriving at a property, you are informed by the fire service, who are already on site tackling a fire, that the gas supply to the house has not been isolated. What is the correct and safest course of action?

Accepted Answer

Inform the fire service incident commander and, if safe, isolate the supply at the external meter box or street valve.

Answer

Enter the property immediately to locate and operate the internal ECV.

Answer

Wait for the fire to be extinguished before taking any action.

Answer

Instruct the homeowner to go back inside and turn off the gas at the meter.