At a pressure of 12.2" hg, what is the corresponding measure?

The question pertains to understanding pressure measurement, specifically in relation to the conversion of units or the interpretation of pressure values. When pressure is reported in inches of mercury (Hg), specifically at 12.2 inches of mercury, it is essential to recognize that this measurement can often be converted to various other units.

The standard atmospheric pressure at sea level is defined as 29.92 inches of mercury. Therefore, to understand what 12.2 inches of mercury represents in other units, one might convert it to the equivalent in terms of atmospheres or other pressure units.

In this case, the corresponding measure of pressure at 12.2 inches of mercury equates to approximately 0.0230 when expressed in atmospheres (atm). This is a direct result of using the conversion factor where 1 inch of mercury equals approximately 0.03386 atmospheres. Performing the calculation using this conversion factor will yield the result that aligns with choice B, establishing it as the correct measure corresponding to 12.2 inches of mercury.

The context of pressure measurement is crucial for industrial refrigeration operators, as accurate pressure readings directly impact system performance and safety protocols. Understanding these conversions aids in effective troubleshooting and system optimization.