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Arrange the steps of using a psychrometric chart to follow a drying process:

1. Locate the ambient air state from dry and wet bulb temperatures

2. Follow a constant humidity line to the heated air temperature

3. Follow the constant wet bulb line as the air picks up moisture

4. Read the exhaust humidity and temperature

Select the correct sequence.

  • A.1, 3, 2, 4
  • B.2, 3, 1, 4
  • C.1, 2, 3, 4
  • D.2, 1, 3, 4

Answer: C

Heating moves the state horizontally and drying moves it along a constant wet bulb line, which is why the chart makes the whole process visible at a glance. The moisture picked up is read as the change in humidity ratio.

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