MCQOPTIONS
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| 1. |
What is normal radiation? |
| A. | Direct radiation |
| B. | Sun s radiation and striking surface are perpendicular to each other |
| C. | Incident solar radiation and striking surface are perpendicular to each other |
| D. | Global insolation direct radiation |
| Answer» C. Incident solar radiation and striking surface are perpendicular to each other | |