ONC Practice Test 2026 — Free ONC Exam Prep Questions
The ONC exam is ONCB's certification for registered nurses with experience in orthopaedic nursing across inpatient, outpatient and surgical settings. Our practice set follows the ONCB exam blueprint by musculoskeletal condition and nursing task, with vignettes on joint replacement, spine surgery, fractures and trauma complications, sports injuries, osteoporosis, inflammatory arthritis, pediatric conditions, bone tumors and neuromuscular disorders.
A 16-year-old had an above-knee amputation for osteosarcoma. On day 3 she refuses to look at her residual limb and says, "Nobody at school will want to be around me." What is the nurse's best response?
ONC format, scoring & key facts
Facts last verified Oct 5, 2026. Source: www.oncb.org/certifications/onc-certification/exam-description/. Always confirm details with ONCB before your exam.
When can you take the ONC?
Plan backwards from your exam date
What the ONC covers
Every PrepBanq ONC test mirrors the official domain weights.
Domain distribution
% of the exam| Content domain | Weight | ≈ Questions on exam | Our practice questions |
|---|---|---|---|
Degenerative DisordersOsteoarthritis, joint arthroplasty, degenerative spine disease and spinal surgery (51 scored items). | 38% | ~51 | 9 questions → |
Orthopaedic TraumaFractures, casts, traction and fixation, and trauma complications such as compartment syndrome and fat embolism (26 items). | 19% | ~26 | 5 questions → |
Sports InjuriesSprains, ligament and tendon injuries, and post-arthroscopic or reconstructive care (15 items). | 11% | ~15 | 3 questions → |
Metabolic Bone DisordersOsteoporosis, osteomalacia, Paget disease and their prevention and treatment (12 items). | 9% | ~12 | 2 questions → |
Inflammatory DisordersRheumatoid arthritis, gout, spondyloarthropathies, lupus and infection-related inflammation (11 items). | 8% | ~11 | 2 questions → |
Congenital/PediatricDevelopmental hip dysplasia, clubfoot, slipped capital femoral epiphysis, scoliosis and other pediatric conditions (7 items). | 5% | ~7 | 1 questions → |
Musculoskeletal TumorsPrimary bone and soft-tissue tumors and metastatic bone disease (7 items). | 5% | ~7 | 2 questions → |
NeuromuscularCerebral palsy, muscular dystrophy, spina bifida and related neuromuscular conditions (6 items). | 4% | ~5 | 1 questions → |
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ONC FAQ
How many questions are on the ONC?
The ONC has 150 questions (135 of them scored). Question types: Multiple choice.
What is the passing score for the ONC?
ONC passing standard: 97 correct of 135 scored questions (raw score).
What is on the ONC?
The ONC covers Degenerative Disorders (about 38%), Orthopaedic Trauma (about 19%), Sports Injuries (about 11%), Metabolic Bone Disorders (about 9%), Inflammatory Disorders (about 8%), Congenital/Pediatric (about 5%), Musculoskeletal Tumors (about 5%), Neuromuscular (about 4%).
Who administers the ONC?
The Orthopaedic Nurse Certified (ONC) Exam is administered by ONCB.
Is there a free ONC practice test?
Yes. PrepBanq has 3 free ONC practice tests with 25 exam-style questions in the real ONC formats, and every answer is explained. No credit card is needed.
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