Typical Prep Blog
An NBCOT scenario set is a group of four related items built on one short client case, called the opening scene. Each item gives you six options and asks you to select the three best. Scenario sets appear only on the OTR exam, and they are mixed in with the regular multiple-choice items.
The NBCOT OTR exam has 180 questions, and the NBCOT COTA exam has 190 questions. You get four hours for either exam, and any break you take comes out of those same four hours.
The NBCOT exam is the national certification exam for occupational therapy. If you graduate from an OT program, you take the OTR exam, which has 180 items. If you graduate from an OTA program, you take the COTA exam, which has 190 items. You get four hours for either one.