What precautions must be taken when installing gas pipework across a cavity wall?

Pipework must be ventilated at both ends

What is the purpose of a sleeving pipe, and when is it required?

To protect the gas pipe when passing through walls or floors

The requirement for pipework passing through a solid wall is:

It must be sleeved to allow for movement and prevent damage.

It must be painted with a waterproof coating.

It must be installed without any insulation.

It must be fixed rigidly to the wall.

What is the correct procedure for purging air from a new gas installation?

Ensure safe ventilation by opening doors and windows

turn lights on and off while purging

make sure you light a cigarette while purging

What is the recommended method for detecting gas leaks during a tightness test?

Use of an electronic gas leak detector

What should be done if a pressure drop is observed during a tightness test?

Investigate and locate the leak

What is the purpose of a gas emergency control valve (ECV)?

To allow the gas supply to be shut off in an emergency

Where should the ECV be located in a domestic installation?

As close as possible to the point of entry of the gas supply into the building

What is the function of an appliance isolation valve?

To isolate individual appliances from the gas supply

What is the requirement for labeling gas isolation valves?

Valves must be clearly labeled to indicate their function

Valves must be labeled to indicate the appliance they control

The correct action if a gas installation fails the tightness test is to:

Locate and repair the leak before retesting

Ignore the result and proceed with use

Increase the gas pressure and retest immediately

Replace the entire gas installation system

How does pipe length affect gas pipe sizing?

Longer pipe runs increase resistance

Longer pipe runs require larger diameter pipe

What is the recommended method for calculating pipe size in domestic installations?

Use of calculation methods provided in the standard

The minimum ventilation requirement for a room containing a gas appliance is:

A permanent vent of appropriate size must be provided.

No ventilation is required if the room is large enough.

A window that can be opened is sufficient.

What is the purpose of a terminal guard on a flue outlet?

To prevent damage to the flue terminal

What type of jointing compound is acceptable for use on gas pipe threads?

A compound that is non-hardening

A compound that is gas-approved

A compound that is suitable for natural gas

What is the requirement for connecting a gas appliance using a flexible hose?

It must not exceed the maximum length

What should be done if a gas pipe is found to be undersized during an inspection?

The pipework must be redesigned

How would you identify a concealed joint in a gas pipe run during a safety check?

By reviewing installation records

By inspecting accessible sections for signs of joints

What documentation must be completed after commissioning a new gas installation?

Appliance installation certificates

A gas engineer should respond to signs of corrosion on exposed pipework by:

Reporting and rectifying the issue promptly.

Ignoring the corrosion if it is minor.

Painting over the corrosion without inspection.

Waiting until a leak occurs before taking action.

What is the correct procedure if a gas leak is suspected in a domestic property?

Isolate the gas supply at the ECV

Do not operate electrical switches

What are the legal responsibilities of a gas engineer under BS 6891 and the Gas Safety (Installation and Use) Regulations?

To ensure installations are safe

To ensure installations are compliant

To ensure installations are tested

How can you verify that a gas appliance is receiving the correct working pressure?

By measuring pressure at the appliance inlet using a manometer

By measuring pressure at the appliance inlet using a pressure gauge

Pipework 50 question Quiz

Authored by Mike Dawson

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Professional Development

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48 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main purpose of BS 6891?

To specify requirements for gas appliances

To specify requirements for gas pipework

To specify requirements for electrical installations

To specify requirements for water pipework

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which types of premises does BS 6891 apply to?

Commercial premises

Industrial premises

Domestic premises

Agricultural premises

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the maximum operating pressure for installations covered by BS 6891?

2 bar

75 mbar

100 bar

150 mbar

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Name three acceptable materials for gas pipework under BS 6891.

Copper, steel, and polyethylene

Copper, aluminum, and polyethylene

Steel, aluminum, and PVC

Copper, steel, and PVC

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the required minimum distance between gas pipework and electrical cables?

10 mm

15 mm

20 mm

25 mm

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the term 'low pressure' refer to in BS 6891?

Gas pressure not exceeding 50 mbar

Gas pressure not exceeding 75 mbar

Gas pressure not exceeding 100 mbar

Gas pressure not exceeding 150 mbar

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the standard test medium for tightness testing of new installations?

Water

Air

Inert gas

Both B and C

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Pipework 50 question Quiz

What is the main purpose of BS 6891?

Which types of premises does BS 6891 apply to?

What is the maximum operating pressure for installations covered by BS 6891?

Name three acceptable materials for gas pipework under BS 6891.

What is the required minimum distance between gas pipework and electrical cables?

What does the term 'low pressure' refer to in BS 6891?

What is the standard test medium for tightness testing of new installations?

What is the minimum duration for a tightness test on a new installation?

What is the acceptable pressure drop during a tightness test for a domestic installation?

What is the minimum depth for buried gas pipework in domestic premises?

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