Water Heating Energy in Australia Quiz

A homeowner is deciding between a gas-storage water heater and an electric water heater. If their main concern is energy efficiency, which should they choose and why?

• Gas-storage water heater, because it is cheaper per unit

• Electric water heater, because it is more efficient due to less heat loss

• Gas-storage water heater, because it is easier to install

• Electric water heater, because it is more widely available

What is the typical capacity range for the insulated steel storage tanks used in Quick Recovery Systems?

• 10 – 30 litres

• 50 – 150 litres

• 200 – 300 litres

• 5 – 20 litres

Why are Quick Recovery Systems considered expensive?

• They use solar energy

• They use day rate electricity

• They require frequent maintenance

• They are made of plastic

If a household needs a storage tank with a capacity of 100 litres, would a Quick Recovery System be suitable based on the information provided?

• Yes, because the capacity range is 50 – 150 litres

• No, because the capacity range is 10 – 50 litres

• No, because the capacity range is 200 – 300 litres

• Yes, because the capacity range is 5 – 20 litres

What is a common characteristic of the initial installation costs for solar energy systems?

• They are low and remain low

• They are high but become reasonable over time

• They are always expensive

• They are subsidized by the government

Explain why solar energy is considered a more sustainable alternative compared to traditional heating methods, based on the information provided.

• Because it is cheaper to install

• Because it reduces CO₂ emissions and greenhouse effects

• Because it requires no maintenance

• Because it is available everywhere

Which of the following is NOT a characteristic of storage heaters?

• Require venting to atmosphere (except gas)

• Water stored in same container

• Connected directly to mains pressure water

• Fitted with pressure relief valve

Why is the amount of hot water available from a storage heater limited?

• Because it is limited to the storage capacity of the tank

• Because it depends on the weather

• Because it is only available at night

• Because it is connected to a small pipe

A building is considering installing storage heaters. What factors should be considered regarding the supply and demand of hot water?

• The storage capacity of the tank and the demand for hot water at peak times

• The color of the heater

• The type of flooring in the building

• The number of windows in the building

A family complains that their hot water supply sometimes runs out and the temperature changes while using multiple taps. Based on the information provided, what is the most likely cause?

• The storage heater is not convenient to install.

• The storage heater has a limited amount of hot water and variation in flow and temperature.

• The storage heater can only be used at one outlet.

• The storage heater provides unlimited hot water.