Revision 5 unvented hot water

Building regulation approved document G3 states that the temperature of the water in a storage hot water system must not exceed:

• 65 ⁰C

• 85 ⁰C

• 98 ⁰C

• 100 ⁰C

Building regulation approved document G3 requires notice to be given to the local authority building control by means of a building control notice unless:

• the installation is 250 litres or above and the individual / business is registered with a competent persons scheme for self certifying UVHW systems

• The individual / business is registered with a competent persons scheme for self certifying UVHW systems

• The system is a 'package' type

• The system is a 'unit' type

The boiling point of water at sea level is:

• 80 ⁰C

• 90 ⁰C

• 100 ⁰C

• 110 ⁰C

with reference to the chart, what is the approximate temperature at which water will boil at 2000m above seal level

• 90 ⁰C

• 80 ⁰C

• 84 ⁰C

• 94 ⁰C

With reference to D2 discharge pipework, what is the minimum vertical drop from the tundish to the first change of direction

• 50 mm

• 150 mm

• 300 mm

• 350 mm

What component device needs to be installed on the cold supply to an unvented cylinder to prevent grit and debris damaging other components

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Which type of primary circulation system can not be used to heat an unvented cylinder

• Fully pumped

• Gravity

• S plan

• Y plan

What regulation covers insulation and performance of Hot water cylinders

• Approved document L1

• Approved document G3

• water regulations 1999

• Approved documents P

What is fitted to the bottom of a cylinder to help prevent corrosion ?

• Sacrificial anode

• Sacrificial cathode

• Brass Block

• Air vent

At what height should a thermostat be fitted on a cylinder?

• 1/3 from the top

• 1/3 from the bottom

• 1/2 way up

• In the middle