I found the test very interesting. You have to keep in mind that Edison was a prolific inventor, who at the time was in the business of disrupting as many industries as he could. From that perspective, he was looking for people who knew a lot about the current state of technology and business, and also able to bring to bear knowledge from apparently unrelated areas.. Many of the questions are trivia related to the technology of the time ("who invented photography?", "where is platinum found", etc.). I think the expectation was that someone who was actively interested in technology would have picked up a lot of that sort of trivia along the way. Some of the less technological questions ("what's the capital of Alabama?") are probably just trying to evaluate how aware the candidate is of the world around them.
A similar list today, say for a candidate to help run a high-tech incubator, might consist of questions like "who founded Google? which is preferable to a seller, a 2nd price auction or a standard auction? where was the web invented? what's the geopolitical and technological significance of tantalum? are lithium batteries riskier than other battery technologies, why or why not? what's a typical price for web advertising (per click, or per impression)? what's a zero-sum game? what's a derivative?" (Those are just off the top of my head, I could probably come up with a better list if I thought about it for 15 minutes). In other words, not things that you must know in order to do the job, but things that anyone capable of doing the job would likely have picked up along the way.
A similar list today, say for a candidate to help run a high-tech incubator, might consist of questions like "who founded Google? which is preferable to a seller, a 2nd price auction or a standard auction? where was the web invented? what's the geopolitical and technological significance of tantalum? are lithium batteries riskier than other battery technologies, why or why not? what's a typical price for web advertising (per click, or per impression)? what's a zero-sum game? what's a derivative?" (Those are just off the top of my head, I could probably come up with a better list if I thought about it for 15 minutes). In other words, not things that you must know in order to do the job, but things that anyone capable of doing the job would likely have picked up along the way.