Which handbook sections your FE discipline actually uses

Three sections every discipline uses

Ethics and professional practice, engineering economics, and probability and statistics appear on every one of the seven discipline specifications. Between them they account for a meaningful share of every FE exam, and none of them are in a discipline section.

That is worth sitting with for a moment. Whatever you are sitting, a substantial part of your paper is answered from the general half of the book, and those are the sections most people under-practise because they feel like somebody else's subject.

The discipline sections are smaller than you expect

It is tempting to treat your own discipline section as the whole exam. For civil and electrical candidates that is nearly defensible, because those sections are enormous. For industrial and chemical candidates it is not: their discipline sections are compact and much of their specification is served from the general half.

Other Disciplines is the outlier

There is no Other Disciplines section at all. Every question on that paper is answered from the general half or from a discipline section that is not labelled with your exam's name. This is the discipline where knowing the complete table of contents pays off most, and where drilling navigation has the highest return of any preparation you can do.

How to use this

Read your own discipline's exam specification and mark, next to each knowledge area, which handbook section serves it. The areas that map to a section you rarely open are exactly the ones to drill. The discipline hub pages on this site do the first half of that mapping for you.