Certified Energy Auditor Practice Exam 2026 – All-in-One Resource to Achieve Exam Success!

The correct formula for calculating energy consumption is based on the relationship between power, time, and energy. Energy is the product of power and time, which means that to determine the total energy consumed, you multiply the power (measured in kilowatts) by the amount of time (measured in hours) that the power is being used. This relationship is fundamental in energy auditing and informs how energy usage is quantified in various settings.

Using this formula, if you know a device operates at a certain power level and you determine how long it runs, you can calculate the total energy consumed in kilowatt-hours (kWh). This is essential for understanding efficiency and managing energy costs effectively.

Other options present incorrect mathematical relationships. Adding power to time or using subtraction does not yield a meaningful representation of energy consumption and shows a misunderstanding of how these variables interact in energy calculation.