1. Safety Program Implementation and Management
15% of the examIdentify weak areas and improve with focused review.
Start PracticingPass your STS certification
Free STS Practice Test
Pass the Safety Trained Supervisor (STS) exam with confidence.
Start with a free STS practice test and build exam-ready confidence for the Safety Trained Supervisor (STS) exam.
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1000+STS Questions
6Exam Domains
10Free Questions
2026Updated
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What you get
Everything your STS certification prep needs
Practice expert-vetted questions, find your weak domains, and turn every mistake into a focused review plan.
Expert-vetted questions
Every question is reviewed by an experienced STS professional for clarity, accuracy and practical exam relevance.
See what to study next
Domain analytics show which parts of the exam blueprint are holding you back.
Turn mistakes into confidence
Missed questions become a review list, so nervous guessing turns into focused repetition.
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Track your readiness, domain strengths, and recent results at a glance.
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Study by domain
Practice the STS exam by domain
2. Hazard Awareness
20% of the examIdentify weak areas and improve with focused review.
Start Practicing3. Hazard Controls
20% of the examIdentify weak areas and improve with focused review.
Start Practicing4. Basic Industrial Hygiene
12% of the examIdentify weak areas and improve with focused review.
Start Practicing5. Emergency Preparedness and Management
11% of the examIdentify weak areas and improve with focused review.
Start Practicing6. Life Critical Activities
22% of the examIdentify weak areas and improve with focused review.
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Frequently asked questions
Straight answers about the STS exam, the questions, pricing, the free trial, and how this fits your prep.
The STS exam spans 6 domains - Safety Program Implementation and Management (15%), Hazard Awareness (20%), Hazard Controls (20%), Basic Industrial Hygiene (12%), Emergency Preparedness and Management (11%), and Life Critical Activities (22%). Every practice question maps to one of them, so you train on exactly what's tested.
The Safety Trained Supervisor (STS) exam has 100 questions and is completed in 2 hours. Our timed practice tests mirror that length and pacing, so exam day feels familiar.
No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the STS exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.
No. STS Exam Prep is an independent study resource for Safety Trained Supervisor (STS). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.
Every paid plan unlocks the full bank of 1,000+ practice questions covering all 6 STS domains - Safety Program Implementation and Management (15%), Hazard Awareness (20%), Hazard Controls (20%), Basic Industrial Hygiene (12%), Emergency Preparedness and Management (11%), and Life Critical Activities (22%). You can practice the whole bank, filter by domain, or run a timed, domain-balanced exam simulation.
Yes - the bank is maintained against the current exam outline, and questions are revised when the exam changes.
No honest practice platform can guarantee a pass. What realistic practice does is show you - before exam day - exactly which domains are weak, and give you the repetitions to fix them. That's the difference between hoping you're ready and knowing where you stand.
Yes. You get 10 free sample questions with instant feedback - no credit card and no account required.
The free sample shows you the question quality. Paid plans unlock the full 1,000+ question bank, exam-style practice modes, mistake review, and - on Fast Track and Pass Confidence - progress analytics that show your readiness by domain.
No. Every plan is a single one-time payment for a fixed access window - 48 hours, 7 days, or 6 weeks. There is no auto-renewal and no recurring billing.
Match it to your exam date: Final Review (2 days) for an exam in the next day or two, Fast Track (7 days) for an exam this week, Pass Confidence (6 weeks) for a structured run-up.
For most countries, the price you see is exactly what you pay - tax is already included. Where local law requires it to be added separately, it's shown clearly at checkout before you pay, so there are never any surprise fees.
Access is instant after payment and runs for your plan's full window from that moment. When the window ends, your local progress stays on your device - you can buy another window any time and pick up where you left off.
Yes - the whole platform is mobile-first: practice, mistake review, and analytics all work on any phone, tablet, or laptop with a browser. Nothing to install.
Every answer feeds your per-domain accuracy, readiness score, and weak-area list. Instead of re-reading everything, you drill the domains that are actually costing you points - that's what moves a score in days, not months.
Chat with us any time - the 24/7 support chat in the corner of every page gives instant answers about plans, access, and billing. Prefer email? The contact link is in the footer. Payments are processed securely by Stripe, and active customers can download an invoice from their profile page.
Make sure you're signed in with the same email you used at checkout - access activates within a minute of payment. If it still doesn't appear, email us from the contact link in the footer and it'll be sorted out.
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Practice workspace
How do you want to practice STS today?
Drill a single domain, run a mixed session, or sit a full timed exam simulation - pick the mode that fits your study window.
Study by domain
Focus on one STS domain at a time - pick it here, then choose a mode.
Popular ways to practice
Quick Practice
Jump straight in with a fast mixed session - perfect for a short study break.
Start quick practice →Domain Practice
Drill the domain selected above and close the gaps where they matter most.
Practice this domain →Exam Simulation
A full-length timed exam that mirrors the real STS test, balanced across every domain.
Start simulation → Unlock with Fast Track & Pass Confidence
More ways to practice
Flashcards
Flip, grade yourself, and repeat the tough ones until they stick.
Train with flashcards →Review Mistakes
Re-drill the questions you got wrong.
Review now →Review Weak Domains
Drill your lowest-scoring domains first.
Find weak spots →All Questions
The complete STS question bank.
Browse all →Multiple Choice
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True/false questions only.
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New here? Start with Quick Practice for a warm-up, or sit the Exam Simulation for the most realistic test-day feel.
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Flip a card, grade yourself honestly, and the deck keeps bringing back the ones you're still learning until they stick.
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Last-minute review
Final Review
$19.95 USD
$29.95Save 33%Limited time
One-time payment
≈ $9.97 per day of access
48-hour access
A focused 48-hour cram for candidates sitting the exam in the next day or two.
- Full 1,000+ question bank
- All 6 STS domains
- Multiple-choice & true/false practice
- 48 hours of unlimited practice
- Analytics & mistake review
Exam this week
Fast Track
$49.95 USD
One-time payment
≈ $7.14 per day of access
7-day access
A focused one-week study push with full progress analytics.
- Ensure success with analytics & mistake review
- Everything in Final Review
- Full-length timed exam simulation
- Progress & accuracy tracking
- Domain weakness analysis
- Quiz history & trends
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Pass Confidence
$129.95 USD
One-time payment
Just $3.09/day · best long-term value
★ 2.6× more likely to pass first time
6-week access
For candidates with 2-6 weeks before exam day - the complete, confident way to prepare.
- Ensure success with analytics & mistake review
- Everything in Fast Track
- 6 full weeks of access
- Exam-readiness scoring
- Priority Support
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Your exam date helps pace your prep. It is saved to your account and visible only to you.
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Move to the next question about a second after a correct answer.
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A subtle buzz on answers, on phones that support it.
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Track your mastery across all STS domains
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Trusted by STS candidates
Real feedback from STS candidates on Reddit.
"put off studying for weeks then panicked and found stspracticetest.com. did the life critical activities questions over and over since thats the biggest chunk. passed first try, still kinda surprised."
"wasnt sure a practice site would actually match the real exam but the hazard controls questions felt pretty close to what showed up. did mock exams on the weekends since i was slammed at work. relieved its over tbh."
"im not a test person, always freeze up. the mistake review after each set helped me actually see what i kept getting wrong on emergency prep stuff instead of just recieving a score and moving on. definately made a difference by the end."