Paragraph comprehension · Difficulty 2
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. Which statement is directly supported by the passage?
- Cleaning panels unnecessarily may waste effort.
- To explain factors involved in maintaining solar output.
- A heavy dust layer can reduce electricity production.
- Sunlight exposure and cleanliness affect solar-panel output.
Reveal answer and explanation
A heavy dust layer can reduce electricity production.
The passage supports this answer: a heavy dust layer can reduce electricity production..