Free STS Practice Tests (2026)
Start with the free diagnostic to see where you stand, then practice in tutor or timed mode. Full-length simulations match the real STS.
Diagnostics
STS Practice Test 1
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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STS Practice Test 2
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 3
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 4
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 5
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 6
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 7
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 8
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 9
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 10
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 11
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 12
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 13
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 14
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testSTS Practice Test 15
10 questions · 12 min10 free STS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testHow these STS practice tests match the real exam
The tests draw on every STS content area, weighted like the official outline:
- Safety Program Implementation and Management (about 15% of the exam)
- Hazard Awareness (about 20% of the exam)
- Hazard Controls (about 20% of the exam)
- Basic Industrial Hygiene (about 12% of the exam)
- Emergency Preparedness and Management (about 11% of the exam)
- Life Critical Activities (about 22% of the exam)
Use tutor mode to see the explanation after each answer, or timed mode to practise at real exam pace. Every answer comes with an explanation of why it is right and why the other options are wrong.