Free CIH 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 CIH.
Diagnostics
CIH Practice Test 1
10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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CIH Practice Test 2
10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testCIH Practice Test 11
10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testCIH Practice Test 12
10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testCIH Practice Test 13
10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testCIH Practice Test 14
10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testCIH Practice Test 15
10 questions · 17 min10 free CIH practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testHow these CIH practice tests match the real exam
The real Certified Industrial Hygienist (CIH) Exam has 180 questions and a 300-minute time limit. Question types: Multiple choice with four options and one best answer. 150 questions are scored and 30 are unscored pilot questions. Questions are not grouped by subject area. Each practice test here uses the same question formats, so you get used to how CIH questions are asked before test day.
The tests draw on every CIH content area, weighted like the official outline:
- Exposure Assessment Principles and Practice (about 50% of the exam)
- Control Selection, Recommendation/Implementation, and Validation (about 35% of the exam)
- Risk Management (about 15% 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.