COSS Study Guide 2026

Everything you need to pass the COSS exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

📋 COSS Exam Format at a Glance

100

Questions

180 min

Time Limit

70%

Passing Score

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📚 COSS Topics to Study (69)

Essentials of Safety Management · 11 cards Safety Skills · 11 cards Accident Investigation Principles · 7 cards Accident Investigation Principles · 7 cards Accident Investigation Principles · 7 cards Accident Investigation Principles · 7 cards Effective Safety Training · 7 cards Effective Safety Training · 7 cards Effective Safety Training · 7 cards Effective Safety Training · 7 cards Essentials of Safety Management · 7 cards Essentials of Safety Management · 7 cards Essentials of Safety Management · 7 cards Essentials of Safety Management · 7 cards Hazard Recognition and Control · 7 cards Hazard Recognition and Control · 7 cards Hazard Recognition and Control · 7 cards Hazard Recognition and Control · 7 cards Incident Rate Calculations · 7 cards Incident Rate Calculations · 7 cards Incident Rate Calculations · 7 cards Incident Rate Calculations · 7 cards Industrial Hygiene · 7 cards Industrial Hygiene · 7 cards Industrial Hygiene · 7 cards Job Safety Analysis (JSA) · 7 cards Job Safety Analysis (JSA) · 7 cards Job Safety Analysis (JSA) · 7 cards Job Safety Analysis (JSA) · 7 cards OSHA Recordkeeping Requirements · 7 cards

See all 69 topics as flashcards →

✍️ Sample COSS Questions & Answers

1. The Severity Rate formula uses which unit instead of recordable cases?

✓ Total days charged

Severity Rate = (Total days charged × 200,000) / Total hours worked, using charged days to measure impact rather than simply counting incidents.

2. A safety program's 'scope' document should primarily define:

✓ The boundaries of the program including which operations, locations, and personnel are covered

A scope document defines the boundaries—what operations, sites, and personnel the safety program applies to—so all stakeholders understand coverage.

3. What does 'audit scope' primarily define in the context of safety auditing?

✓ The boundaries and extent of the audit including locations, activities, and time period

Audit scope defines what is included in the audit — which sites, processes, time periods, and organizational units will be examined.

4. What is the primary purpose of re-enacting or reconstructing an accident during an investigation?

✓ To verify witness accounts and identify physical cause factors

Accident reconstruction helps investigators verify witness statements and identify physical and environmental factors that contributed to the event.

5. Under OSHA's Lockout/Tagout standard (29 CFR 1910.147), an 'authorized employee' is defined as one who:

✓ Locks out or tags out machines to perform servicing

An authorized employee is specifically the person who locks out or tags out the machine or equipment to perform service or maintenance.

6. An employee is using a portable extension ladder to access a roof landing. To comply with OSHA 1910.23, the side rails of the ladder must extend at least how far above the upper landing surface?

✓ 3 feet

OSHA 1910.23(c)(11) states that portable ladders used to gain access to an upper landing surface must have side rails that extend at least 3 feet above that surface to provide a safe handhold for employees stepping on and off the ladder.

🎯 Free COSS Practice Tests

Essentials of Safety Management · 11 questions Safety Skills · 11 questions Accident Investigation Principles · 7 questions Accident Investigation Principles · 7 questions Accident Investigation Principles · 7 questions Industrial Hygiene · 7 questions Accident Investigation Principles · 7 questions Industrial Hygiene · 7 questions Industrial Hygiene · 7 questions Essentials of Safety Management · 7 questions

📖 COSS Guides & Articles

Your COSS Study Path

1. Learn with Flashcards → 2. Drill Practice Tests → 3. Take the Full Exam Simulation

🃏 COSS Flashcards (475)🏆 COSS Exam Simulation

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