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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

Answer :

To find the pressure in the R-22 cylinder at a temperature of 120°F, we would typically refer to a Pressure-Temperature (P-T) chart for R-22 refrigerant. These charts provide the saturation pressure of refrigerants at specific temperatures when the refrigerant is in a state where both liquid and vapor exist.

1. Identify the Temperature: We know the temperature is 120°F.

2. Look Up Pressure-Temperature Chart: Find the corresponding pressure for R-22 at 120°F from the P-T chart.

3. Determine Pressure: For R-22 at 120°F, the pressure is commonly recorded as 259.9 psig.

Therefore, the correct pressure in the cylinder at this temperature is 259.9 psig, which matches option (b).

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