API 936

Five areas, weighted roughly equally: refractory materials, properties, and selection; design and specification; installation, mixing, and curing; inspection, testing, and quality control; and dryout, repair, and maintenance. Expect applied items that combine a material choice with an installation or inspection consequence, not isolated definitions.

That information is not published in the source material available for this page, so treat any figure you hear secondhand with suspicion. Confirm the current item count, appointment length, and delivery method on API's Individual Certification Programs pages before you schedule.

Neither the passing standard nor the retake rules are stated in the verifiable source used here. Do not plan around a remembered number, because programs are revised. Check API's current candidate handbook or certification page for the passing score, retake waiting period, and any fee involved.

Candidates with real field exposure generally find it manageable; candidates who only memorized tables find it hard. Difficulty comes from breadth and from items that ask you to reason about why a lining failed, not from obscure trivia. Expect to justify choices about anchors, mix water, cure, and heat-up.

Start with materials and properties, because selection and specification depend on them. Then design and anchors, then installation and mixing, then inspection and testing, and finish with dryout, repair, and maintenance. Dryout sits last logically because it ties together what the earlier sections built.

Three stand out: memorizing property tables without understanding trade-offs, confusing inspection test methods and what each one detects, and mishandling dryout and heat-up reasoning such as ramp rates and hold points. Another frequent error is answering from habit instead of reading the specific condition stated in the stem.

It is strongly recommended rather than assumed. The questions read differently once you have watched material being mixed, placed, and cured, and once you have seen a failed lining cut out. Documented work experience also matters for eligibility, so check API's current requirements before applying.

There is no official study-hours figure published in the source available here. A practical approach is to work backward from your exam date, allocate most time to the two domains where your background is weakest, and reserve the final weeks for mixed practice and reviewing standards language.

No. Use it to orient yourself and to test recall, but the authoritative content lives in API 936 and the referenced refractory standards, plus manufacturer installation instructions. Always check acceptance criteria and testing details against the current edition of the standard rather than against a summary.