A recovery cylinder which is half full of recovered R-500 at normal room temperature (about 75F), in the absence of non-condensables, will be pressurized to:

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Multiple Choice

A recovery cylinder which is half full of recovered R-500 at normal room temperature (about 75F), in the absence of non-condensables, will be pressurized to:

When a recovery cylinder contains both liquid and vapor of a pure refrigerant, the inside pressure reaches the saturated vapor pressure of that refrigerant at the cylinder’s temperature. If there are no non-condensables, the gas present is just the refrigerant vapor, so the pressure equals the refrigerant’s vapor pressure at about room temperature (75 F). For R-500 at 75 F, that saturation pressure is approximately 95 psig, so the cylinder will be pressurized near 95 psig. The other values would imply different temperatures or the presence of non-condensables, which isn’t the case here.

When a recovery cylinder contains both liquid and vapor of a pure refrigerant, the inside pressure reaches the saturated vapor pressure of that refrigerant at the cylinder’s temperature. If there are no non-condensables, the gas present is just the refrigerant vapor, so the pressure equals the refrigerant’s vapor pressure at about room temperature (75 F). For R-500 at 75 F, that saturation pressure is approximately 95 psig, so the cylinder will be pressurized near 95 psig. The other values would imply different temperatures or the presence of non-condensables, which isn’t the case here.

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