Note that I tend to think the questions I posted are geared towards an Intermediate-type formula level. If you are not looking for something like that, how about just asking how to use or how to build some formulas? I.e. Rank this column of numbers; Use the DGET function on this (xxx) data range; Use the HLOOKUP function on this (xxx) data range; etc. I guess it depends on how advanced your office-wide skills go. That interpretation can vary from office to office.
Then there is always questions you can ask about native functions, such as Autofilter, AdvancedFilter, Text to Columns, Sheet/Workbook Protection, Find/Replace, Defined Names, Security Settings, Subtotals, Sorting, Pivot Tables, Charting, Hyperlinks, Comments, etc.