GMJ 6035 Hot Water - 50 questions based on the handbook

What is a common indicator of thermostat failure in a hot water system?

• Increased water pressure

• Discolored water

• No hot water or water too hot

• Low water flow

What should be done if an immersion heater fails?

• Install a larger cylinder

• Replace the immersion heater following Building Regulations Part P

• Increase water pressure

• Drain the system

What can cause water hammer in a domestic water system?

• Incorrect thermostat settings

• High water velocity

• Sudden closure of the float-operated valve

• Overheating of water

Which issue can be caused by unbalanced pressure in a manually controlled shower?

• Uneven water temperature

• Air locks

• Corrosion of pipes

• Overheating

What is the recommended solution for flow noise in hot water systems?

• Use a pressure-reducing valve

• Increase pipe diameter

• Add a water softener

• Flush the system

How can limescale be effectively reduced in a hot water system?

• Add more insulation

• Increase pipe pressure

• Install a scale inhibitor or water softener

• Install a larger thermostat

Which British Standard recommends that hot pipes should be installed above cold pipes?

• BS6700

• BS8000 pt15

• BS1710

• BS8300

What is a primary cause of air locks in low-pressure systems?

• High water temperature

• Improperly installed horizontal pipework

• Overheated cylinder

• Too many valves in the system

What is the purpose of a magnetic scale inhibitor?

• Trap debris

• Alter the physical structure of water

• Increase water flow

• Neutralize chlorine

How do polyphosphate chemicals help in hot water systems?

• Remove all sediments

• Prevent scale formation

• Increase water pressure

• Flush out contaminants