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Relative Humidity Exercise
Practice Sheet

1.    The air holds 6 grains of water vapor and can hold 10 grains.  What is the relative humidity (H_R)?

2.    At the given temperature, the air can hold 15 grams of water vapor.  It only holds 7.5 grams.  What is the
        H_R?

3.    Once cubic meter of air can hold 15 grams of water vapor at 30^OC.  You find that 2 cubic meters holds
        16 grams.  What is the H_R?

4.    The content of the air is 8 grains and the capacity is 24 grains,  what is the H_R?

5.    The air temperature is 35^OC and the air can hold 35 grams of water vapor.  The H_R is 45% so what is the
        content?

        Using the H_R graph found at the end of this practice sheet, answer the following questions.

6.    The temperature is 70^O F and the air holds 6 grains of water vapor per cubic foot.  What is the  H_R?

7.    The temperature is 10^O C and the air holds 5 grams of water vapor per cubic meter.  What is the  H_R?

8.    The air holds 2 grains of water vapor per cubic foot.  The H_R is 50%.  What is the temperature?