A weak-sounding horn is being diagnosed. Technician A says that a poor ground connector at the horn itself could be the cause. Technician B says that an open relay can be the cause. Which technician is correct?
A) Technician A only B) Technician B only
C) Both technicians A and B D) Neither technician A nor B
A
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Review drawing number 523879C0A and then answer the question.
REFRIGERANT
TEMP _____________________ TEMP ______________________ TEMP ________________________ °F 12 22 134a 502 °F 12 22 134a 502 °F 12 22 134a 502 -60 19.0 12.0 7.2 12 15.8 34.7 13.2 43.2 42 38.8 71.4 37.0 83.8 -55 17.3 9.2 3.8 13 16.4 35.7 13.8 44.3 43 39.8 73.0 38.0 85.4 -50 15.4 6.2 0.2 14 17.1 36.7 14.4 45.4 44 40.7 74.5 39.0 87.0 -45 13.3 2.7 1.9 15 17.7 37.7 15.1 46.5 45 41.7 76.0 40.1 88.7 -40 11.0 0.5 14.7 4.1 16 18.4 38.7 15.7 47.7 46 42.6 77.6 41.1 90.4 -35 8.4 2.6 12.4 6.5 17 19.0 39.8 16.4 48.8 47 43.6 79.2 42.2 92.1 -30 5.5 4.9 9.7 9.2 18 19.7 40.8 17.1 50.0 48 44.6 80.8 43.3 93.9 -25 2.3 7.4 6.8 12.1 19 20.4 41.9 17.7 51.2 49 45.7 82.4 44.4 95.6 -20 0.6 10.1 3.6 15.3 20 21.0 43.0 18.4 52.4 50 46.7 84.0 45.5 97.4 -18 1.3 11.3 2.2 16.7 21 21.7 44.1 19.2 53.7 55 52.0 92.6 51.3 106.6 -16 2.0 12.5 0.7 18.1 22 22.4 45.3 19.9 54.9 60 57.7 101.6 57.3 116.4 -14 2.8 13.8 0.3 19.5 23 23.2 46.4 20.6 56.2 65 63.8 111.2 64.1 126.7 -12 3.6 15.1 1.2 21.0 24 23.9 47.6 21.4 57.5 70 70.2 121.4 71.2 137.6 -10 4.5 16.5 2.0 22.6 25 24.6 48.8 22.0 58.8 75 77.0 132.2 78.7 149.1 -8 5.4 17.9 2.8 24.2 26 25.4 49.9 22.9 60.1 80 84.2 143.6 86.8 161.2 -6 6.3 19.3 3.7 25.8 27 26.1 51.2 23.7 61.5 85 91.8 155.7 95.3 174.0 -4 7.2 20.8 4.6 27.5 28 26.9 52.4 24.5 62.8 90 99.8 168.4 104.4 187.4 -2 8.2 22.4 5.5 29.3 29 27.7 53.6 25.3 64.2 95 108.2 181.8 114.0 201.4 0 9.2 24.0 6.5 31.1 30 28.4 54.9 26.1 65.6 100 117.2 195.9 124.2 216.2 1 9.7 24.8 7.0 32.0 31 29.2 56.2 26.9 67.0 105 126.6 210.8 135.0 231.7 2 10.2 25.6 7.5 32.9 32 30.1 57.5 27.8 68.4 110 136.4 226.4 146.4 247.9 3 10.7 26.4 8.0 33.9 33 30.9 58.8 28.7 69.9 115 146.8 242.7 158.5 264.9 4 11.2 27.3 8.6 34.9 34 31.7 60.1 29.5 71.3 120 157.6 259.9 171.2 282.7 5 11.8 28.2 9.1 35.8 35 32.6 61.5 30.4 72.8 125 169.1 277.9 184.6 301.4 6 12.3 29.1 9.7 36.8 36 33.4 62.8 31.3 74.3 130 181.0 296.8 198.7 320.8 7 12.9 30.0 10.2 37.9 37 34.3 64.2 32.2 75.8 135 193.5 316.6 213.5 341.2 8 13.5 30.9 10.8 38.9 38 35.2 65.6 33.2 77.4 140 206.6 337.2 229.1 362.6 9 14.0 31.8 11.4 39.9 39 36.1 67.1 34.1 79.0 145 220.3 358.9 245.5 385.0 10 14.6 32.8 11.9 41.0 40 37.0 68.5 35.1 80.5 150 234.6 381.5 262.7 408.4 11 15.2 33.7 12.5 42.1 41 37.9 70.0 36.0 82.1 155 249.5 405.1 280.7 432.9 An R-22 cylinder containing enough refrigerant to have liquid refrigerant in it, is in a truck with a temperature of 120°F. What would be the psig pressure in the cylinder? A. 255.7 psig B. 259.9 psig C. 267.0 psig D. 271.5 psig
____ (FCU) are intended to provide more heat than ventilation.
A. Fan cabinet units B. Field cabinet units C. Fan coil units D. Field coil units
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