A psychrometer has a dry-bulb reading of 90F and a wet-bulb reading of 60F. Find each...

  

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A psychrometer has a dry-bulb reading of 90F and a wet-bulb reading of 60F. Find each of the following measurements. (Use the data in this table as necessary.) (a) relative humidity (Enter your answer as a percentage.) % (b) dew point (Enter your answer in degrees.) (c) maximum moisture capacity of the air (Enter your answer in gr/ft.) gr/m (d) actual moisture content of the air (Enter your answer in gr/ft.) gr/m Appendix H Psychrometric Tables (pressure: 30 in. of Hg) Table H.1 Relative Humidity (%) and Maximum Moisture Capacity Capacity (gr/ft) 1 Air Temp. (F) Max. Moisture Degrees Depression of Wet-Bulb Thermometer (F) (Dry Bulb) 2 3 4 5 6 7 8 9 10 15 20 20 25 30 25 1.6 87 74 62 49 37 25 13 1 30 1.9 89 78 67 56 46 36 26 16 6 35 2.4 91 81 72 63 54 45 36 27 19 10 40 2.8 92 83 75 68 60 52 45 37 29 22 45 3.4 93 86 78 71 64 57 51 44 38 31 50 4.1 93 87 80 74 67 61 55 49 43 38 10 55 4.8 94 88 82 76 70 65 59 54 49 43 19 60 5.7 94 89 83 78 73 68 63 58 53 48 26 5 65 6.8 95 90 85 80 75 70 66 61 56 52 31 12 70 7.8 95 90 86 81 77 72 68 64 59 55 36 19 3 75 9.4 96 91 86 82 78 74 70 66 62 58 40 24 9 80 10.9 96 91 87 83 79 75 72 68 64 61 44 29 15 3 85 12.7 96 92 88 84 80 76 73 69 66 62 46 32 20 8 90 14.8 96 92 89 85 81 78 74 71 68 65 49 36 24 13 95 17.1 96 93 89 85 82 79 75 72 69 66 51 38 27 17 100 19.8 96 93 89 86 83 80 77 73 70 68 54 41 30 21 105 23.4 97 93 90 87 83 80 77 74 71 69 55 43 33 23 110 97 93 90 87 84 81 78 75 73 70 57 46 36 26 26.0 Note: To use the table, determine the air temperature with a dry-bulb thermometer and degrees depressed on the wet-bulb thermometer. Read the relative humidity (in percent) opposite and below these values. Read the maximum capacity directly. Table H.2 Dew Point (F) Air Temp. (F) Degrees Depression of Wet-Bulb Thermometer (F) (Dry Bulb) 1 2 3 4 5 6 7 8 9 10 15 20 25 30 25 22 19 15 10 5 -3 -15 -51 30 27 25 21 18 14 8 2 -7 -25 35 33 30 28 25 21 17 13 7 0 0 40 38 35 33 30 28 25 21 18 13 15 45 43 41 38 36 34 31 28 25 22 25 50 48 46 44 42 40 37 34 32 29 34 0 55 53 51 50 48 45 43 41 38 36 42 15 60 58 57 55 53 51 49 47 45 43 49 25 -8 65 63 62 60 59 57 55 53 51 49 56 34 14 70 69 67 65 64 62 61 59 57 55 62 42 26 -11 75 74 72 71 69 68 66 64 63 61 69 49 36 15 80 79 77 76 74 73 72 70 68 67 74 56 44 28 -7 85 84 82 81 80 78 77 75 74 72 80 62 52 39 79 19 90 89 87 86 85 83 82 81 79 78 86 69 59 48 32 95 94 93 91 90 89 87 86 85 83 91 74 66 56 43 100 99 98 96 95 94 93 91 90 89 80 80 72 63 52 105 104 103 101 100 99 98 96 95 94 86 86 78 70 61 110 109 108 106 105 104 103 102 100 99 91 91 84 77 68 Note: To use the table, determine the air temperature with a dry-bulb thermometer and degrees depressed on the wet-bulb thermometer. Find the dew point opposite and below these values. A psychrometer has a dry-bulb reading of 90F and a wet-bulb reading of 60F. Find each of the following measurements. (Use the data in this table as necessary.) (a) relative humidity (Enter your answer as a percentage.) % (b) dew point (Enter your answer in degrees.) (c) maximum moisture capacity of the air (Enter your answer in gr/ft.) gr/m (d) actual moisture content of the air (Enter your answer in gr/ft.) gr/m Appendix H Psychrometric Tables (pressure: 30 in. of Hg) Table H.1 Relative Humidity (%) and Maximum Moisture Capacity Capacity (gr/ft) 1 Air Temp. (F) Max. Moisture Degrees Depression of Wet-Bulb Thermometer (F) (Dry Bulb) 2 3 4 5 6 7 8 9 10 15 20 20 25 30 25 1.6 87 74 62 49 37 25 13 1 30 1.9 89 78 67 56 46 36 26 16 6 35 2.4 91 81 72 63 54 45 36 27 19 10 40 2.8 92 83 75 68 60 52 45 37 29 22 45 3.4 93 86 78 71 64 57 51 44 38 31 50 4.1 93 87 80 74 67 61 55 49 43 38 10 55 4.8 94 88 82 76 70 65 59 54 49 43 19 60 5.7 94 89 83 78 73 68 63 58 53 48 26 5 65 6.8 95 90 85 80 75 70 66 61 56 52 31 12 70 7.8 95 90 86 81 77 72 68 64 59 55 36 19 3 75 9.4 96 91 86 82 78 74 70 66 62 58 40 24 9 80 10.9 96 91 87 83 79 75 72 68 64 61 44 29 15 3 85 12.7 96 92 88 84 80 76 73 69 66 62 46 32 20 8 90 14.8 96 92 89 85 81 78 74 71 68 65 49 36 24 13 95 17.1 96 93 89 85 82 79 75 72 69 66 51 38 27 17 100 19.8 96 93 89 86 83 80 77 73 70 68 54 41 30 21 105 23.4 97 93 90 87 83 80 77 74 71 69 55 43 33 23 110 97 93 90 87 84 81 78 75 73 70 57 46 36 26 26.0 Note: To use the table, determine the air temperature with a dry-bulb thermometer and degrees depressed on the wet-bulb thermometer. Read the relative humidity (in percent) opposite and below these values. Read the maximum capacity directly. Table H.2 Dew Point (F) Air Temp. (F) Degrees Depression of Wet-Bulb Thermometer (F) (Dry Bulb) 1 2 3 4 5 6 7 8 9 10 15 20 25 30 25 22 19 15 10 5 -3 -15 -51 30 27 25 21 18 14 8 2 -7 -25 35 33 30 28 25 21 17 13 7 0 0 40 38 35 33 30 28 25 21 18 13 15 45 43 41 38 36 34 31 28 25 22 25 50 48 46 44 42 40 37 34 32 29 34 0 55 53 51 50 48 45 43 41 38 36 42 15 60 58 57 55 53 51 49 47 45 43 49 25 -8 65 63 62 60 59 57 55 53 51 49 56 34 14 70 69 67 65 64 62 61 59 57 55 62 42 26 -11 75 74 72 71 69 68 66 64 63 61 69 49 36 15 80 79 77 76 74 73 72 70 68 67 74 56 44 28 -7 85 84 82 81 80 78 77 75 74 72 80 62 52 39 79 19 90 89 87 86 85 83 82 81 79 78 86 69 59 48 32 95 94 93 91 90 89 87 86 85 83 91 74 66 56 43 100 99 98 96 95 94 93 91 90 89 80 80 72 63 52 105 104 103 101 100 99 98 96 95 94 86 86 78 70 61 110 109 108 106 105 104 103 102 100 99 91 91 84 77 68 Note: To use the table, determine the air temperature with a dry-bulb thermometer and degrees depressed on the wet-bulb thermometer. Find the dew point opposite and below these values.