Balancing Knowledge Check

Twenty-two questions on application, calculation, and judgment across the balancing series: six articles and seven calculators. The check is open-book. Every question carries lookup links that open in a new tab, and answers autosave in this browser so the check can be finished in more than one sitting. Six questions call for a calculation. Each can be worked by hand from the formulas in the articles or with the linked calculator, which opens blank. Three of those calculators are available to free subscribers and three to premium members. Submit the answers once at the end for a score, a per-article breakdown, and explanations for any question answered incorrectly. A certificate carrying the results summary prints at 80 percent or better.

Answers autosave in this browser. Save to file keeps a copy you can load in another browser or on another device, signed in or not. After submission, Start over restores the blank test.