Quiz on Hot Water Systems

What is the main purpose of a centralised hot water system?

• To deliver hot water from a central point to all outlets

• To provide individual heating units at each outlet

• To reduce water pressure in the system

• To increase the temperature of cold water

Which type of system is fed from a cistern in the roof space?

• Unvented system

• Indirect system

• Open vented system

• Direct system

What is the typical pressure provided by a cistern 15m above the cylinder?

• 0.5 bar

• 1.0 bar

• 1.5 bar

• 2.0 bar

What is the main advantage of using Economy 7 electricity for hot water systems?

• Lower installation cost

• 100% energy efficiency

• Faster heat-up time

• Reduced risk of scale build-up

What is a disadvantage of using a boiler in a direct hot water system?

• Risk of rusty water

• Low energy efficiency

• High installation cost

• Slow heat-up time

What is the function of an immersion heater in a direct hot water system?

• To provide a backup heat source

• To heat water using gas

• To circulate water in the system

• To control water pressure

What is the recommended temperature limit for immersion heaters to minimize scale build-up?

• 65°C

• 55°C

• 75°C

• 45°C

Which type of hot water system uses gravity circulation?

• Instantaneous system

• Open vented direct system

• Localised system

• Centralised unvented system

What is the typical storage capacity for a direct hot water system suitable for four people?

• 210 litres

• 300 litres

• 150 litres

• 100 litres

What is a potential risk of using a boiler in a direct hot water system without thermostatic control?

• Low water pressure

• Scalding

• Slow heat-up time

• Rusty water