Plubing level 2 - PP 1.2 - Hot water

What is the common power rating for domestic immersion heaters?

• 4kW

• 2kW

• 3kW

• 5kW

Which length is NOT a common size for immersion heaters?

• 14 inches

• 27 inches

• 11 inches

• 20 inches

What is a disadvantage of open vented combination units?

• Complex installation

• Requires multiple cisterns

• High installation cost

• Lack of head pressure

What is the temperature difference that can occur due to stratification in hot water cylinders?

• Up to 100°C

• Up to 125°C

• Up to 75°C

• Up to 50°C

What is a risk associated with direct cylinders?

• Risk of rusty water

• Requires two cisterns

• Expensive to install

• Lack of CW storage

Which system is known for having a quick heat-up time?

• Indirect cylinder

• Direct cylinder

• Combination unit

• Single feed system

What is a common method of solar thermal heating?

• Using biomass

• Using geothermal energy

• Using evacuated tubes

• Using wind turbines

What must be incorporated in unvented hot water cylinders due to the lack of an open vent?

• Multiple coils

• Extra heating elements

• Safety relief

• Additional insulation

What is a characteristic of instantaneous hot water systems?

• They are always centralised

• They require a CWSC in the loft

• They heat water only when needed

• They store large amounts of water

What is a common use for single point water heaters?

• Providing hot water to isolated basins

• Heating large homes

• Central heating

• Solar water heating