OHST Practice Test 2026 — Free OHST Exam Prep Questions
The OHST credential from BCSP is for safety and occupational hygiene technicians and technologists whose jobs combine hazard control, basic industrial hygiene and safety program work. The exam covers safety math, risk management, hazard identification and control, health hazards, emergency preparedness, training and ethics. Our original scenario and calculation questions follow BCSP's current OHST6 blueprint, and every answer choice is explained.
A plant replaced a toluene vapor degreaser with an aqueous washer, permanently ending the exposure. The technician wants to clear out the personal air-sampling results collected on the degreaser from 2019 to 2025. Under 29 CFR 1910.1020, how long must these sampling results be kept?
OHST format, scoring & key facts
Computer-based at Pearson VUE test centers, purchased and scheduled through your BCSP My Profile. An on-screen calculator emulating the TI-30XS is provided (no personal calculators), plus a whiteboard and marker. No formula sheet is provided.
| Blueprint | OHST6 Examination Blueprint (in use since February 1, 2024): seven domains |
|---|---|
| Time | 4 hours |
| Question format | Four options, one best answer; about 12% unscored beta items |
| Calculator | On-screen TI-30XS emulator; no personal calculators |
| Formulas | No formula sheet; needed formulas appear in the question |
| Largest domain | Hazard Identification and Control, 21.1% |
| Experience | 3 years (at least 35% occupational hygiene or safety duties) |
| Fee | $140 application + $300 exam |
| Retakes | At least six weeks between attempts |
| Recertification | 20 points every 5 years plus annual renewal |
Facts last verified Oct 18, 2026. Source: www.bcsp.org/occupation-hygiene-and-safety-technician-ohst. Always confirm details with BCSP before your exam.
When can you take the OHST?
Once BCSP approves your application, you have one year to take and pass the exam at a Pearson VUE test center. A one-time $100 extension is available within 60 days of the deadline.
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What the OHST covers
Every PrepBanq OHST test mirrors the official domain weights.
Domain distribution
% of the exam| Content domain | Weight | Our practice questions |
|---|---|---|
Fundamental Math and Science and Business Calculations/Analysis | 11.3% | 17 questions → |
Safety, Health, and Environmental Programs (Includes Risk Management) | 19.5% | 29 questions → |
Hazard Identification and Control | 21.1% | 32 questions → |
Health Hazards and Basic Industrial Hygiene | 15.8% | 24 questions → |
Emergency Preparedness, Fire Prevention, and Security | 11.5% | 17 questions → |
Organizational Communication and Training/Education | 12.6% | 19 questions → |
Ethics and Professional Conduct | 8.2% | 12 questions → |
How to register for the OHST
Eligibility
Three years of experience where at least 35% of the job duties require(d) technical skills and knowledge in occupational hygiene or safety. No degree is required.
Retake policy
You can schedule a new attempt at least six weeks after your last attempt, within your one-year eligibility period.
Score release
Official results are available as soon as you submit the exam.
Credential renewal
Maintain the OHST with an annual renewal fee and 20 recertification points every 5 years, including 0.5 points from ethics courses.
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OHST FAQ
How long is the OHST exam?
Testing time for the OHST is 4 hours.
What is the passing score for the OHST?
OHST passing standard: Pass/fail, with the passing score set by BCSP through a passing-score study. Score range: Pass/Fail.
How much does the OHST cost?
The OHST registration fee is Application $140; exam $300 (application + exam $426). Exam bundle with two attempts and a Self-Assessment $550 ($676 with application). Annual renewal $150.. Check the official site for current fees before you register.
What is on the OHST?
The OHST covers Fundamental Math and Science and Business Calculations/Analysis (about 11.3%), Safety, Health, and Environmental Programs (Includes Risk Management) (about 19.5%), Hazard Identification and Control (about 21.1%), Health Hazards and Basic Industrial Hygiene (about 15.8%), Emergency Preparedness, Fire Prevention, and Security (about 11.5%), Organizational Communication and Training/Education (about 12.6%), Ethics and Professional Conduct (about 8.2%).
Who administers the OHST?
The Occupational Health and Safety Technologist (OHST) Exam is administered by BCSP. Delivery: Computer-based at Pearson VUE test centers, purchased and scheduled through your BCSP My Profile. An on-screen calculator emulating the TI-30XS is provided (no personal calculators), plus a whiteboard and marker. No formula sheet is provided.
Can you retake the OHST?
You can schedule a new attempt at least six weeks after your last attempt, within your one-year eligibility period.
Is there a free OHST practice test?
Yes. PrepBanq has 15 free OHST practice tests with 150 exam-style questions in the real OHST formats, and every answer is explained. No credit card is needed.
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