Exam-style question
Try this first
When estimating the energy consumption of a household, which assumption is commonly made?.
- A.All appliances are used simultaneously.
- B.Energy consumption is the same year-round.
- C.The average usage of appliances is representative.
- D.All appliances are energy-efficient.
Model answer
What a good answer should say
- The average usage of appliances is representative.
Explanation
Why this works
The correct answer is that average appliance usage is representative. A sensible household energy estimate uses typical use rather than an extreme case.
Assuming all appliances run at once or that use is identical all year would make the estimate unrealistic.
Common mistake
No common mistake is linked to this question yet.