Multiple pipefitter practice exams are available at Exam Bank and Quizlet. The practice exams at Exam Bank have question banks that allow for randomized testing with varying credits and question numbers depending on what test is taken.
Quizlet has a set that has been made to help study for the pipefitter test. In addition to a practice test, there are two games, flashcards and a dictation section to help with studying. Though a Quizlet account is not needed to access the set, to keep scores and times for games or to mark flashcards as learned or not, an account is recommended. The set is also available for printing.