Encceja Ensino Médio Practice Questions - Exame Nacional Para Certificação De Competências De Jovens E Adultos - Ensino Médio Exam

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A family in São Paulo is analyzing their monthly electric energy bill to identify ways to reduce costs. They notice that an electric shower with a nominal power rating of 5,500 W (5.5 kW) is used for a total of 1 hour per day (combining all four family members' showers). In contrast, a 200 W (0.2 kW) refrigerator operates intermittently, with its compressor running for an effective total of 10 hours per day. Considering a 30-day month, which appliance consumes more monthly electrical energy, and what is its total monthly consumption in kilowatt-hours (kWh)?

The refrigerator consumes more energy, with a total of 180 kWh per month. The electric shower consumes more energy, with a total of 165 kWh per month compared to 60 kWh for the refrigerator. Both appliances consume the exact same amount of energy, totaling 120 kWh each per month. The refrigerator consumes more energy, with a total of 300 kWh per month compared to 55 kWh for the shower.

Correct Answer:

The electric shower consumes more energy, with a total of 165 kWh per month compared to 60 kWh for the refrigerator.

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