Gas Engineering Multiple Choice Questions

What is the main requirement of Regulation 20?

• Install pipework in visible locations

• Avoid impairing the structure or fire resistance of a building

• Use only copper pipework

• Install pipework underground

Regulation 21 requires a suitable vessel to be fitted to pipework when:

• The pipework is over 10 meters

• Liquid or solid deposits are likely to occur

• The pipework is made of plastic

• The pipework is in a commercial building

Which gases typically do not require clogging precautions?

• Biogas and landfill gas

• Natural gas and LPG

• Hydrogen and oxygen

• Butane and propane

What must be done immediately after work affecting gastightness of pipework?

• Paint the joints

• Test for gastightness and inspect joints

• Install a new meter

• Replace all pipework

Why should joints not be painted before testing?

• It looks unprofessional

• Paint may create a temporary seal and falsify test results

• Paint is flammable

• It voids the warranty

What is required after purging if the pipework is not to be used immediately?

• Leave it open

• Seal off every outlet with an appropriate fitting

• Flush with water

• Label it as inactive

Regulation 23 requires gas pipework to be marked in which type of premises?

• All premises

• Non-domestic premises

• Residential homes only

• Underground installations

What must be included in the system diagram under Regulation 24?

• Only the main meter

• All pipework over 25 mm, meters, valves, and test points

• Only emergency controls

• Pipework under 10 mm

What is the purpose of Regulation 26(1)?

• Ensure appliances are energy efficient

• Ensure appliances can be used safely

• Ensure appliances are CE marked

• Ensure appliances are under warranty

Used gas appliances must be:

• Painted before installation

• Verified to be in a safe condition

• Installed with flexible hoses

• Installed without testing