Understanding Electricity Costs Quiz

A refrigerator uses 150 watts of power. How many kilowatt-hours does it consume if it runs for 24 hours?

• 3.6 kWh

• 1.8 kWh

• 2.4 kWh

• 0.36 kWh

If the cost of electricity is $0.12 per kWh, how much would it cost to run a 1000-watt microwave for 2 hours?

• $0.24

• $0.12

• $0.20

• $0.30

Which of the following appliances typically uses the most electricity in a household?

• LED light bulb

• Refrigerator

• Ceiling fan

• Electric oven

A washing machine uses 500 watts per hour. How many kilowatt-hours does it use if it runs for 3 hours?

• 1.5 kWh

• 0.5 kWh

• 3 kWh

• 2 kWh

If a household uses 900 kWh in a month, and the cost per kWh is $0.15, what is the total electricity cost for that month?

• $135

• $120

• $150

• $100

Which of the following is an example of an energy-efficient appliance?

• Incandescent light bulb

• Halogen heater

• LED light bulb

• CRT television

A 60-watt light bulb is used for 5 hours a day. How many kilowatt-hours does it consume in a month (30 days)?

• 9 kWh

• 10 kWh

• 8 kWh

• 7 kWh

If a dishwasher uses 1.5 kWh per cycle and is used 20 times a month, what is the total energy consumption for the month?

• 30 kWh

• 25 kWh

• 35 kWh

• 40 kWh

Which appliance would likely have the highest energy efficiency rating?

• Old refrigerator

• New Energy Star refrigerator

• Electric water heater

• Desktop computer

A television uses 200 watts. How many kilowatt-hours does it consume if it is on for 10 hours?

• 2 kWh

• 1 kWh

• 0.5 kWh

• 3 kWh