CSS Cheat Sheet 2026

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

1. A Safety Data Sheet (SDS) Section 6 provides first responders with information on: → Accidental release measures and cleanup procedures
2. What does the acronym 'SDS' stand for in the context of chemical hazard communication? → Safety Data Sheet
3. Under OSHA's Hazard Communication Standard (HazCom), when must employees receive training on newly identified chemical hazards? → Before initial assignment to work with the hazardous chemical
4. Which of the following is the most effective way to verify that a hazard control measure is working? → Conducting post-control monitoring and measuring actual exposure or incident rates
5. The substitution method of hazard control involves: → Replacing a hazardous substance or process with a less hazardous one
6. When establishing safety accountability, which element is most critical for frontline supervisors? → Having clearly defined safety responsibilities tied to performance evaluations
7. A chemical spill occurs and the Safety Data Sheet (SDS) is unavailable. What is the BEST immediate action? → Call 1-800-424-8802 (CHEMTREC) or the manufacturer's emergency number for guidance
8. Which of the following is NOT an accepted method of fall protection for workers on low-slope roofs (slope ≤ 4:12) under OSHA construction standards? → Warning line system alone without any other protection
9. What is the primary purpose of a Permit-Required Confined Space entry program? → To identify, control, and monitor hazards before and during entry
10. What is the lower explosive limit (LEL) threshold at which a confined space atmosphere is considered hazardous under OSHA standards? → 5% LEL
11. An audit trail in a safety management system serves primarily to: → Document the sequence of events and decisions supporting compliance
12. Under OSHA's Respiratory Protection standard (29 CFR 1910.134), a medical evaluation to determine respirator suitability must be provided to employees: → Before they are fit tested or required to use a respirator
13. What does the hierarchy of controls place as the MOST effective method to reduce workplace hazards? → Elimination
14. Senior management's visible commitment to safety is best demonstrated by which action? → Conducting regular unscripted safety walkthroughs and engaging workers directly
15. Under OSHA's Process Safety Management standard (29 CFR 1910.119), a Process Hazard Analysis (PHA) must be updated and revalidated at least every: → 5 years
16. What is the required minimum distance that a scaffold platform must be planked or decked when a scaffold is more than 2 feet wide? → Planked as close to the front edge as possible, within 14 inches
17. The primary purpose of photographing an accident scene is to: → Provide visual evidence that preserves the scene as found before it is altered
18. When an inspector identifies an imminent danger during a workplace inspection, the first action should be to: → Stop the operation and remove employees from the area
19. When should a post-incident critique (after-action review) be conducted following a serious workplace accident? → As soon as all immediate hazards are controlled and key personnel are available
20. What should be done immediately after an accident occurs at work? → Provide first aid and medical treatment
21. What does the acronym 'BLEVE' stand for in emergency response? → Boiling Liquid Expanding Vapor Explosion
22. Under 29 CFR 1910.147 (Lockout/Tagout), an 'authorized employee' is defined as someone who: → Locks or tags out machines or equipment to perform servicing
23. Which NFPA standard covers the minimum requirements for emergency response organizations? → NFPA 1600
24. A construction site supervisor observes workers trenching without a protective system in a 6-foot excavation. Which hazard category does this represent? → Cave-in/engulfment hazard
25. ANSI/ISEA Z87.1 is the standard governing which category of personal protective equipment? → Eye and face protection
26. Which element is MOST critical when conducting a baseline hazard assessment of a new facility? → Walking all work areas and systematically identifying all potential hazards
27. When a new chemical process is introduced to a workplace, the most proactive approach to hazard control is to: → Conduct a pre-startup safety review (PSSR) before operations begin
28. The Hierarchy of Controls places PPE at which position? → Last (least effective)
29. What is the OSHA action level for occupational noise exposure under 29 CFR 1910.95? → 85 dBA 8-hr TWA
30. What voltage threshold does OSHA define as 'high voltage' for construction electrical work under 29 CFR 1926? → Over 600 volts