1) Use the chart to give relative humidity of the air at 10֯C if it contains 4.7 g/m3 water vapour. 2) Use the chart to give relative humidity of the air at 0֯C if it contains 1.2 g/m3 water vapour.

3) Use the chart to give the temperature at which air containing 0.7 gramme/m3 water vapour becomes saturated.

4) Use the chart to give the temperature at which air containing 6.7 gramme/m3 water vapour becomes saturated.

5) Use the chart to give the dew point of the air that contains 2.4 gramme/m3 water vapour.

6) Use the chart to give the dew point of the air that contains 17.3 gramme/m3 water vapour.