NALMCO Certified Apprentice Lighting Technician (CALT) Practice Exam

If we achieve energy savings of 200 kWh and the utility cost per kWh is $0.10, what is the dollar value of the energy savings?

1. $2

2. $10

3. $20

4. $40

The correct answer is: $20

To find the dollar value of the energy savings, you simply multiply the total energy saved (in kilowatt-hours) by the cost per kilowatt-hour. In this case, you have achieved energy savings of 200 kWh, and the cost per kWh is $0.10. So the calculation goes as follows: 200 kWh x $0.10/kWh = $20. This means that by saving 200 kWh of energy, you save $20 in utility costs. This calculation utilizes basic multiplication to convert energy savings into a monetary value, which is a fundamental aspect of understanding energy efficiency and cost savings. Therefore, the correct answer reflects the straightforward math involved in calculating the dollar value of energy savings, making option C the appropriate choice.