OHST Exam Study Guide 2026–2027 | Occupational Hygiene and Safety Technician Prep, BCSP Blueprint + 2 Practice Tests (200 Qs)

Prepare for the Occupational Hygiene and Safety Technician (OHST) examination from the Board of Certified Safety Professionals with a study guide organized around the seven domains of the current OHST blueprint. Every topic is reviewed the way a technician applies it on the job, with the formulas, limits, and decisions the exam tests.

Inside this guide

• Exam overview: 200 multiple-choice questions, 4-hour time limit, blueprint domain weights, eligibility, fees, scheduling, retake rules, and recertification
• Fundamental Math, Science, and Business Calculations: TWA and ppm-to-mg/m³ conversions, statistics, ventilation and lifting equations, physics and chemistry for safety, radiation shielding, incident rates, EMR, and ROI
• Safety, Health, and Environmental Programs: program elements, audits, behavior-based safety, OSHA standards, citations and recordkeeping, GHS labels and SDSs, RCRA generator categories, risk matrices, and process safety management
• Hazard Identification and Control: hazard recognition, the hierarchy of controls, incident investigation and root cause analysis, plus confined spaces, lockout/tagout, electrical safety, fall protection, excavations, cranes and rigging, forklifts, machine guarding, compressed gases, hot work, and heat and cold stress
• Health Hazards and Basic Industrial Hygiene: exposure limits, toxicology, sampling media and calculations, noise dosimetry, respirator protection factors, and hearing conservation
• Emergency Preparedness, Fire Prevention, and Security: emergency action plans, the Incident Command System, terrorism agents, fire classes and extinguishers, and workplace violence prevention
• Organizational Communication and Training: SDS sections, conflict resolution, ADDIE, adult learning, and the Kirkpatrick evaluation model
• Ethics and Professional Conduct: the BCSP Code of Ethics, confidentiality, legal accountability, and integrity
• 35 quick-reference tables and flow diagrams, plus a Final Review Checklist
• 2 practice tests (100 questions each, 200 total) weighted like the OHST blueprint, with an answer key and a detailed explanation for every question
• Study schedules (30, 60, and 90 days), frequently asked questions, and test-taking strategies

Product details

• Digital PDF, instant download, US Letter size
• Print it or study on screen

This is an independent study resource and is not affiliated with or endorsed by the Board of Certified Safety Professionals (BCSP). OHST® and Occupational Hygiene and Safety Technician® are registered trademarks of BCSP.