Knowledge-Test II on Energy Efficiency in Households – Advanced level

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* 1. Which of the following recommendations are cost- and energy- efficient?

Setting the water temperature above 60°C (140 °F).

Setting the water temperature between 55 °C and 60° (131 F and 140 °F).

Invest in a Solar Water Heater instead of using an electric water heater.

Use natural gas or propane gas instead of electricity to heat your water.

Install a timer or switch on your electric water heater to control usage time.

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* 2. Which statement(s) related to timers and motion sensors are true?

Motion sensors and timers consume standby power and are therefore, not worth the investment.

Timers and motion sensors control electric devices and switch them on/off as needed.

Timers and motion sensors can reduce electricity for lighting by up to 70%.

The use of timers and motion sensors may damage the connected device.

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* 3. How is water consumption related to electricity consumption?

The higher the amount of used hot water is, the higher is the electricity consumption.

The more water is heated, the higher is the electricity consumption.

The higher the water needs to be pumped, the higher is the electricity consumption.

A household`s water consumption does not affect its electricity consumption.

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* 4. Which statement(s) related to a TV is/are true?

The increase of the size of a TV (screen diameter) reduces the power consumption.

A 32” older Plasma TV consumes less power than a 32” CRT screen (older cathode-ray tube TV).

In radio mode, switching to a blank screen reduces the power consumption of the TV.

Reducing the volume of the TV reduces power consumption.

Enabling the ambient light sensor of the TV saves electricity.

Devices like TV, set-top-boxes, DVD players etc. are responsible for more than 10% of your electricity bill.

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* 5. What is the stand-by consumption of a larger Plasma or LED TV system?

Up to 1 W and 8.76 kWh per year

Up to 15 W and 131,4 kWh per year

Up to 0.1 W and 0.876 kWh per year

Up to 10 W and 87.60 kWh per year

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* 6. By how much can I reduce my home annual electricity bill if I recharge my smartphone at work every day?

15 - 20 Wh

around 50 kWh

15 -20 kWh

around 100 kWh

1 – 8 kWh

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* 7. Which of the following devices is more energy efficient for boiling smaller volumes of water?

Stove with conventional hob

Electric kettle (if with automatic turn-off and based on material that has a low heat conduction)

Stove with ceramic hob

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* 8. Which of the following devices is more energy efficient for boiling smaller volumes of water?

Induction stove

Microwave

Coffee-maker