According to the amended shift test procedure in 2007, a bench scale marked with "accuracy class 3" and a capacity of 30 lb x 0.01 lb must have a shift test conducted at what load?

The correct load for conducting the shift test on a bench scale marked with "accuracy class 3" is indeed at one-third of its maximum load. This requirement ensures that the scale is tested under conditions that represent typical use scenarios. By testing the scale at one-third of its capacity, you can evaluate its performance and accuracy without pushing it to its limits, thereby providing a more reliable measure of its functionality across a range of operational loads.

Testing at one-third of the maximum capacity also aligns with standard practices that help maintain the integrity of measuring equipment and ensure that it operates effectively throughout its designated range. This method contributes to maintaining compliance with regulatory standards and assures users of the scale's dependability in practical applications.