CSS Study Guide 2026
Everything you need to pass the CSS 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.
📋 CSS Exam Format at a Glance
📚 CSS Topics to Study (27)
✍️ Sample CSS Questions & Answers
1. What is the role of an 'attendant' in a confined space entry operation under 29 CFR 1910.146?
The attendant remains outside the permit space, maintains communication with entrants, monitors for hazards, and initiates rescue procedures without entering.
2. The Immediately Dangerous to Life or Health (IDLH) concentration values are established by which U.S. agency?
NIOSH (National Institute for Occupational Safety and Health) establishes IDLH values, which represent the maximum concentration from which a worker could escape within 30 minutes without irreversible health effects.
3. When a chemical presents multiple hazards (e.g., both flammable and acutely toxic), how must the SDS label address these hazards?
GHS requires that labels include all applicable hazard pictograms, signal words, hazard statements, and precautionary statements for every hazard class the chemical falls under.
4. Under OSHA 1910.132, employers are generally required to provide PPE at NO cost to employees EXCEPT for which item?
OSHA's PPE payment rule requires employers to pay for most required PPE, but prescription eyewear that an employee could also use off the job is a noted exception.
5. What is the purpose of engineering controls in hazard control?
Engineering controls involve making physical changes to the workplace or equipment to reduce or eliminate exposure to hazards. This means designing or modifying machinery, processes, or the work environment itself to inherently make it safer. Examples include installing ventilation systems, machine guards, or noise enclosures, which isolate people from the hazard or remove the hazard at its source through design.
6. In chemical safety, a 'secondary container' is best defined as:
A secondary container is any container other than the original manufacturer container into which a chemical is transferred, and it must be labeled with the chemical identity and applicable hazard warnings.