The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.000145037738007 PSI, or 0.001 kPa. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between pounds/square inch and kilopascals.
Despite the name, the inspected article may not necessarily be the 'first' produced. First article inspection is typically called for in a contract between the producer and buyer of some manufactured article, to ensure that the production process reliably produces what is intended.
It differs from the main idea in that author's purpose not the point you're supposed to get; it's the why behind the author picked up a pen or selected those words in the first place. If you're trying to determine the author's purpose on a standardized test, your question may look something like this: 1. The author most likely mentions the Depression in lines 33 - 34 to: A. identify the primary purpose for Social Security. B. criticize FDR's adoption of a program that would run out of money.