Course Check

You've covered the foundations: what energy is, how it's measured, the crucial difference between energy and power, why organisations manage energy, the improvement cycle, and how to turn a saving into a financial decision. Let's consolidate it.

Answer the six questions below, then check your score. You can retry as many times as you like.

Knowledge check

1. 1. Which statement best describes the difference between energy and power?

   They are the same thing measured in different unitsPower is the rate of energy use; energy is power multiplied by timeEnergy is measured in kW and power in kWhPower is always a larger number than energy

2. 2. A 5 kW motor runs continuously for 4 hours. How much energy does it use?

   5 kWh9 kWh20 kWh1.25 kWh

3. 3. One kilowatt-hour (kWh) is equal to:

   3.6 MJ1,000 J100 MJ3,600 MJ

4. 4. The first law of thermodynamics tells us that:

   Energy can be created if you supply enough powerEnergy is conserved — it is converted, never destroyedEnergy always increases over timeHeat can never be turned into useful work

5. 5. A project costs £12,000 and saves £4,000 per year. Its simple payback is:

   0.33 years3 years4 years8 years

6. 6. A key limitation of simple payback is that it:

   Is too complicated for screening projectsIgnores the time value of money and any savings after the payback pointAlways overstates the return on a projectCannot be applied to energy projects

Check answers0 of 6 answered

Where to go next

Nicely done — you now share the vocabulary and mindset every energy professional builds on.

When you're ready, head back to the course overview or jump straight into Level 2 from the navigation above. The cycle never really ends — and that's the point.