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Discussion

Consider the following statements about wet and dry bulb temperatures.
1. They are equal when the air is saturated.
2. The wet bulb reading is never above the dry bulb reading.
3. Their difference increases as the humidity rises.

  • A.1 only
  • B.All of them
  • C.1 and 2 only
  • D.3 only

Answer: C

The first two are correct. The third is inverted, since a large difference means dry air with rapid evaporation and the gap closes to nothing as saturation is approached. The depression is what a psychrometric chart is entered with.

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