COSS Cheat Sheet 2026

The 30 highest-yield COSS facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Silica dust in the respirable fraction is categorized under which class of industrial hygiene particulates? → Respirable crystalline silica
2. When must employers retrain employees on PPE use according to OSHA? → When the employee does not demonstrate understanding or proper use
3. Which of the following is regarded as an indirect cost of an accident? → Loss of earning power
4. When is a COSS authorized to serve as a lookout? → Never
5. Who will be in charge of implementing the corrective measures into action? → The management
6. Who is required to maintain records of workplace injuries and illnesses according to CFR 1904? → Employers with eleven or more employees
7. What does the term 'double protection' mean in the context of hearing conservation? → Wearing both earplugs and earmuffs together
8. The 'incipient stage' of a fire refers to: → The earliest stage of a fire when it can be controlled with a portable extinguisher
9. When evaluating heat stress in workers, which index accounts for temperature, humidity, radiant heat, and air movement? → Wet Bulb Globe Temperature (WBGT)
10. Which type of hearing protection has the highest Noise Reduction Rating (NRR) potential? → Foam earplugs
11. Before an employee can use a tight-fitting respirator, OSHA requires which of the following? → A medical evaluation and fit test
12. What is the primary purpose of a fire brigade in a workplace as defined by OSHA 29 CFR 1910.156? → To perform interior structural firefighting and emergency rescue at the facility
13. Which standard governs protective footwear in the United States? → ASTM F2413
14. Which type of respirator provides the highest level of respiratory protection by supplying breathable air from an independent source? → Self-contained breathing apparatus (SCBA)
15. A COSS is developing a new safety training program for the entire facility. What should be the foundational first step in this process? → Conducting a needs assessment to identify hazards and knowledge gaps.
16. Which industrial hygiene term refers to the minimum concentration of a flammable vapor in air below which ignition cannot occur? → Lower explosive limit (LEL)
17. How often should employers conduct evaluations of each powered industrial truck operator's performance? → At least once every 3 years
18. To reach a Position of Safety, as a COSS leading a group, how many lines can your group cross? → 1
19. A worker is exposed to a noise level of 95 dBA TWA. What is the maximum permissible exposure time under OSHA's Table G-16? → 4 hours
20. According to OSHA 29 CFR 1910.132, who is responsible for conducting a workplace hazard assessment to determine necessary PPE? → The employer
21. Since accidents have a specific cause, they are _________. → predictable and generally preventable
22. Who is covered by OSHA, as per the OSHA Act? → Every employer and employee in the US and its territories.
23. Under OSHA standards, who must pay for required PPE in most general industry situations? → The employer must pay at no cost to the employee
24. Which factor does NOT affect the rate of skin absorption of a hazardous chemical in an occupational setting? → The color of the worker's personal protective equipment
25. Under OSHA 29 CFR 1910.38, which of the following employers is required to have a written Emergency Action Plan (EAP)? → All employers with more than 10 employees
26. According to most OSHA standards that mandate training, what is the primary purpose of maintaining training records and certifications? → To verify and document that the employer has met its compliance obligations.
27. Which of the following would be defined as a 'hole' under OSHA's Walking-Working Surfaces standard (1910.21), thereby requiring a cover or other protection? → A 3-inch diameter pipe opening in a concrete floor.
28. Which category of health hazard is associated with noise-induced hearing loss? → Physical hazard
29. Which hierarchy of controls is PPE considered in occupational safety? → Last resort after all other controls
30. Once a Job Safety Analysis (JSA) has been completed and documented, what is the most critical subsequent action to ensure its effectiveness? → Communicating the findings and providing training to all employees who perform the job.