Paragraph comprehension · Difficulty 3
Try this ASVAB-style question.
Choose your answer before opening the explanation. This original practice item is for preparation and does not reproduce an official test question.
Solar panels produce the most electricity when direct sunlight reaches their surface. Dust does not stop production entirely, but a heavy layer can reduce output. Periodic inspection helps determine when cleaning is worthwhile. What can reasonably be inferred from the passage?
- To explain factors involved in maintaining solar output.
- Cleaning panels unnecessarily may waste effort.
- Sunlight exposure and cleanliness affect solar-panel output.
- A heavy dust layer can reduce electricity production.
Reveal answer and explanation
Cleaning panels unnecessarily may waste effort.
The passage supports this answer: cleaning panels unnecessarily may waste effort..