Besides a review course (EET, TestMasters, PassPE, School of PE, etc.) and the review practice test (Learncivilengineer.com, PPI, Mike's, and SquarePegs, etc.), there may be another place to find practice problems, perhaps check out the problems on Chegg.com. Chegg has problems and solutions (sometimes incorrect solutions) intended for those taking a current class on the subject, but may be helpful to those taking the PE Exam, too. There is a monthly charge for this service, about $14.95. Below is a link to just one page of civil engineering problems from February 3 of 2018. To view the answers, one will have to subscribe.
https://www.chegg.com/homework-help/questions-and-answers/civil-engineering-archive-2018-february-03
One can search for more specific problems by typing in a few of the key words of a problem statement.
In addition, if one has bought a textbook and would want to see how these experts solved the chapter ending problems, one can walk through these solutions by typing in the name and edition of the textbook.
Be careful: these solutions by these experts don't always get the correct answer. Read the comments section for each problem to see someone else found something incorrect. If you find an incorrect answer, please leave a reason why it is incorrect in their 'comment' section for those that come later. Also, the problems and/or solutions may be difficult to read at times. Lastly, most problems may be considered very easy and basic, but there are gem problems which may be very useful.