Hot water level 3 9189

Which of these is NOT a key factor when designing a hot water system

• Number of outlets

• Type of fuel

• Running costs and efficiently

• Water pressure

• water hardness or softness

What is the correct description of a centralised hot water system

• Hot water is delivered from a central point to all HW outlets in the building

• Hot water is delivered form a point close to the appliance and only supplies that appliance

What is the name of this hot water component

• Thermostatic blending valve

• Thermostatic mixing valve

• Thermostatic control valve

• Thermostatic moving valve

What is the correct setting for this valve on a domestic bath

• 65c

• 20c

• 45c

• 48c

What building regulation approved document covers hot water safety and water efficiently

• G

• F

• H

• A

When installing servicing or maintaining an unvented hot water cylinder what approved documentation needs to be followed and consulted - which one is not correct

• Building regulation Part G3

• Building regulation Part A

• Water regulations 1999

• Building regulations L1

• Manufactures instructions

Building regulations state that hot water storage systems that are not open vented require the water temperature stored should never exceed what temperature

• 60c

• 90c

• 95c

• 100c

What is the purpose of the non return single check valve in an unvented hot water storage system

• Isolate the water supply for maintenance

• Prevent grit and debris from entering the cylinder

• Stop expanded hot water from entering the cold water supply pipe

• Prevent over heating of the cylinder

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 system can not be used to heat an unvented cylinder

• Fully pumped

• Gravity

• S plan

• Y plan