Validates knowledge of leading Six Sigma projects, including the DMAIC method, advanced statistics, team management and organizational deployment.
CSSBB is a 165-question, open-book exam (150 scored) over 4 hours 18 minutes, with many items where two answers sound reasonable and one is best. We compared the main options on question style, official coverage and price.
Most people should start with Quality Gurus' free 50 questions. Make ASQ's three 150-question sets your main readiness check and use the ASQ Study Guide for reps by section.
| Practice test | Best for | Questions | Price |
|---|---|---|---|
 CSSBB Free Practice Tests | Free first look | 50 | Free |
 ASQ CSSBB Question Bank | Official question bank | 450 | $119 |
| ASQ Certified Six Sigma Black Belt Study Guide, 2nd Edition | Printed section drills | 700 | $60 |
| CSSBB Practice Test Package | Budget mock exams | 641 | $25/3 months |
 QCI CSSBB Online Practice Exam | Large question pool | 1,000 | $70/year |
 Pocket Prep ASQ CSSBB | Study on your phone | 650 | $21/month |
Two free sets of 25 questions: a review set that explains each answer as you go and a timed mock of 60 minutes. Both run in the browser.
Great fit if you want to see exam-style CSSBB questions and find your weak sections before paying for anything.
Poor fit if you need exam-length runs; use the ASQ Question Bank.
Three 150-question sets written by ASQ-certified experts, with a timed exam mode and a review mode that explains right and wrong answers.
Great fit if you want ASQ-written, full-length sets to rehearse the 4 hour 18 minute sitting.
Poor fit if you want printed questions you can mark up (see the ASQ Study Guide) or cheaper volume (see Quality Gurus).
A softcover with 550 questions grouped by the nine Body of Knowledge sections and 150 more in random order, with solutions that cite the BoK.
Great fit if you want to practise by section and learn where answers sit in your handbook.
Poor fit if you want a timed on-screen run; use the ASQ Question Bank.
Ten tests with explanations: a 150-question mock drawn fresh from a 426-question pool on every attempt, topic quizzes on the hardest areas and the two free sets.
Great fit if you want cheap volume and a new full-length mock each time you sit one.
Poor fit if you want ASQ's own wording; use the ASQ Question Bank.
A 1,000-question bank with explanations and references, taken by category or as a simulated exam. It installs on one Windows or Mac computer and does not run on phones or Chromebooks.
Great fit if you already study from QCI's Primer and want a large bank to match.
Poor fit if you study on a phone or tablet; use Pocket Prep.
Short quizzes by section plus missed-question, weakest-subject and timed quizzes, each with an explanation. Built for short sessions rather than a full-length sitting.
Great fit if you want daily practice in short sessions between work.
Poor fit if you want full-length timed exams; use the ASQ Question Bank.
ASQ: Black Belt exam page ↗Reddit: passed March 2026 ↗Reddit: study guide vs online questions ↗Reddit: recent study materials thread ↗Reddit: exam simulation resources ↗
ASQ does not publish a free sample exam; its question bank and study guide are paid. Quality Gurus gives 50 free exam-style questions (a 25-question review set and a 25-question, 60-minute mock) with explanations and no signup.
Candidates who passed say yes: its questions are good for reps by section but simpler than the exam. ASQ's question bank is described as closer to the real exam's style.
Two or three full 150-question runs on questions you have not seen, each followed by a full review, is a sensible target. ASQ's bank has three sets and Quality Gurus draws a fresh 150-question mock each attempt.
The exam gives 4 hours 18 minutes for 165 questions, about 94 seconds each. Make a first pass that skips long calculations, flag them, then use the remaining time on flagged items.