How is the PV calculated for a U16 or G10 gas meter?

• 1.5 x PV

• 5x the badge capacity

• 1.5 x IV

• 0,01m³

What is the correct gas rate if you start and finish meter readings are 0.592 and 0.681?

• 27.58kw gross

• 26kw gross

• 28.72kw gross

• 29.46kw gross

When converting gross to net heat input you must

• Multiply by 1.11

• Divide by 1.11

• Divide by 1.09

• Multiply by 1.09

1.     What is the equivalent new KW figure if adventitious air?

• 14kw

• 28kww

• 1.11kw

• 7kw

What is the smallest size of opening allowed in a vent supplying combustion air?

• 5mm

• 6mm

• 9mm

• 10mm

Vents supplying combustion air to a gas fired appliance passing through a cavity wall must be?

• At least 100mm² cross sectional area

• Sleeved/ducted throughout the width of the wall

• Painted yellow ochre to identify is a gas vent

• At least 50% larger than the actual requirement

Calculate the ventilation for an open flued gas boiler of 22.2kw gross with a room venting direct to the outside? (hint: convert to net)

• 65cm²

• 76 cm²

• 100 cm²

• 111 cm²

Wherever there are two or more internal vents in series, the free area of each internal vent shall be increased by?

• 100 cm²

• 50 cm²

• 50%

• 10%

Calculate the compartment ventilation for 22kw net heat input open flued boiler where the component is vented into a room?

• High 220 cm²  Low 440 cm²

• High 220 cm² Low 220 cm²

• High 110 cm² Low 220 cm²

• High 150 cm² Low 300 cm²

Where would air for combustion be taken from on a vertex flue?

• The loft space

• The fan

• The compartment vents

• The terminal