Lesson 6: Energy Efficiency

Question 1

Why are LED lights better for;

Home owners

Answer 1

The led lights waste less energy, and is 75% more efficient than a filament light bulb. Home owners want more energy efficient light bulbs because they use light all the time, especially in the night.

Question 2

Why are LED lights better for;

The environment

Answer 2

To keep the environment thriving with health, we want to use less emissions that damage the environment, and leds use less wasteful energy than can harm the environment.

Question 3

he calculation used to determine the energy efficiency of the lamp

Answer 3

Efficiency = (useful energy transferred divided by energy supplied) x 100

Question 4

Identify 7 ways energy efficiency can be increased

Answer 4

• The use of lubrication can reduce friction and reduce the transfer to heat
• The use of thermal insulation can reduce the loss of heat
• A house can be insulated to reduce heat - insulation can be added to attic or loft
• Double glazing can be used on windows
• Draft fitters can be fitted to the doors
• Cavity wall insulation can be used
• Carpets can be laid

Question 5

Explain what the star rating is.

Answer 5

The star rating is about energy efficiency, the more stars shown on the Energy Rating Level, the less energy the product will use and the more money you will save on your energy bills

Question 6

Explain why consumers should consider the energy star rating when purchasing an appliance

Answer 6

Consumers should consider the energy star rating when purchasing an appliance because consumers want the product to use less energy, and as a result they save more money.