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WorksheetsGas Meter Installation Quiz
Total questions: 37
Worksheet time: 19mins
What is a key consideration when installing domestic gas meters?
The meter should be painted a bright color.
The meter should be installed in a basement.
The meter should be secure and cannot move.
The meter should be installed near a window.
Which part of BS 6400 covers low pressure installations?
Part 1
Part 2
Part 3
Part 4
What is the maximum capacity for BS 6400 pt1-3 inc meters?
5m³/hr
6m³/hr
7m³/hr
8m³/hr
What type of meter housing is designed to blend into the surroundings?
Surface mounted
Semi-concealed
Built-in meter boxes
Medium pressure (MP) installations
Where should a gas meter be fitted inside a building?
As far as possible from the incoming supply pipe
Close to where the incoming supply pipe enters the building
In the basement
Near the electrical wiring and switchgear
Under what conditions should a domestic gas meter not be fitted?
Where food is stored
In a well-ventilated area
In a dry environment
Away from electrical wiring
What is required for a gas meter installation in a building with two or more storeys above ground floor?
It can be located under the stairs
It should not be located under the stairs if the stairway forms the only means of escape
It must be installed in the basement
It should be placed near the main entrance
What should be done if there is no option other than to fit the meter under stairs?
The meter should be fire resistant
The meter should be painted
The meter should be left exposed
The meter should be placed on the floor
What is a "pliable connection" in the context of gas meter installations?
A rigid pipe
A semi-rigid pipe
A flexible hose
A metal chain
What is the purpose of a semi-rigid connection in gas meter installations?
To allow for continual flexing
To connect multiple meters
To fit between the emergency control valve and the meter inlet
To replace flexible connections
What must be confirmed about the meter installation before proceeding?
It is suitable for the outlet pressure at the ECV
It is painted in a specific color
It is installed by a certified electrician
It is connected to multiple gas lines
What is the minimum flow rate required for the regulator during commissioning?
5.0 m³/h
3.5 m³/h
2.0 m³/h
4.0 m³/h
What should be included on the label of the meter?
The installation date
The user procedure for a gas leak
The manufacturer's logo
The meter's color code
What is the purpose of protective equipotential bonding in gas installations?
To enhance the aesthetic of the installation
To ensure the pipework is electrically safe
To increase the gas flow rate
To reduce installation costs
What is the required size for the protective equipotential bonding conductor according to BS 7671/IET Regulations?
5mm²
8mm²
10mm²
12mm²
What is the maximum pressure drop allowed when a domestic gas meter installation is operating at maximum capacity?
2 mbar
3 mbar
4 mbar
5 mbar
What should be done to the incoming supply pipe when a gas meter is permanently removed?
Leave it open
Cap it off with an appropriate fitting and test for leaks
Connect it to another meter
Ignore it
What is the maximum throughput for a G10 gas meter in m³/h?
6 m³/h
10 m³/h
16 m³/h
20 m³/h
What must be fitted if a meter is to be positioned more than 2m from the ECV?
A new meter
An AECV
A permanent cross bond
A temporary fitting
What is the purpose of sealing the meter box in gas installations?
To prevent gas from escaping into the building
To improve the aesthetic appearance
To increase the gas pressure
To reduce the cost of installation
Why should new washers always be used when meters are reconnected?
To ensure a tight seal and prevent leaks
To save on costs
To improve the appearance of the meter
To increase gas flow
What is the diversity factor for combination boilers ?
1
0.8
0.6
0.4
Why might a diversity factor be applied when calculating gas meter capacity?
To account for the likelihood that not all appliances will operate at full capacity simultaneously
To increase the overall gas supply
To reduce the number of appliances
To simplify the installation process
What is the calculated load (kW) for a combination boiler with a heat input of 38 kW and a diversity factor of 0.8? (The formula to calculate diversified load (also referred to as calculated load or design load) is:
Calculated Load (kW) = Heat Input (kW) × Diversity Factor)
30.4 kW
28.4 kW
32.4 kW
34.4 kW
What is the typical operating pressure range for Medium Pressure (MP) meter installations?
Above 75mbar and up to 2 bar
Above 50mbar and up to 1.5 bar
Above 100mbar and up to 3 bar
Above 60mbar and up to 1 bar
What is the range of operating pressure at the inlet of the meter for flows in the range of 0.5m³/h to the maximum capacity?
15-20 mbar
19-23 mbar
25-30 mbar
10-15 mbar
What should the regulator lock-up pressure at the outlet of the meter not exceed at Maximum Operating Pressure (MOP)?
30 mbar
27.5 mbar
25 mbar
20 mbar
According to the document, what is the minimum relief valve discharge capacity for regulators to PRS 29/E?
1.0 m³/h
1.5 m³/h
1.75 m³/h
2.0 m³/h
What is the minimum proximity distance from a meter box to a building opening for a relief valve discharge capacity of 0 ≤ 1 m³/h?
150 mm
180 mm
200 mm
220 mm
What is the minimum distance the vent pipe needs to be fixed from the outside of the meter box?
10mm
25mm
50mm
100mm
What is the required internal diameter of any vent pipe?
Less than 4mm
Less than 6mm
Less than 8mm
Less than 10mm
Who is authorized to break the seal on a primary meter regulator?
Any person
The gas transporter
A person authorized to act on the transporter’s behalf
The property owner
What is the purpose of positioning the flame trap on the purge hose in a suitable safe location?
To prevent gas leaks
To ensure proper pressure
To avoid fire hazards
To maintain temperature
How long should the re-set lever be held against the spring pressure during the test?
For at least 1 minute
For at least 5 seconds
For at least 10 seconds
For at least 30 seconds
What should be done if the MIV is passing gas during the 1 min let-by test?
Replace the entire system
Depressurize the ECV
Replace the complete regulator assembly and re-test
Increase the pressure
What is the maximum pressure allowed on the regulator during the purge?
22.5 mbar
27.5 mbar
30 mbar
25 mbar
What should be done if the relief valve operates outside the pressure range of 3.5 ± 3.5 mbar?
Increase the pressure
Replace the relief valve
Replace the complete regulator assembly and re-test
Depressurize the system
