If you’re being asked to identify hazards in a scenario, you’re likely working through a safety training exercise, whether for a workplace course, an OSHA certification, or a college-level safety class. The key is scanning the scene systematically rather than guessing. Workplace hazards fall into six broad categories: physical, chemical, biological, ergonomic, psychosocial, and safety-related. Knowing these categories gives you a mental checklist so you don’t miss anything when reviewing a scenario image, video, or written description.
The Six Hazard Categories to Scan For
Every scenario-based hazard question is testing whether you can sort what you see into recognized categories. Here’s what falls under each one:
- Physical hazards affect the body through the environment: excessive noise, radiation, extreme heat or cold, and vibration.
- Chemical hazards involve exposure to harmful substances: solvents, adhesives, paints, toxic dusts, cleaning agents, or unlabeled containers.
- Biological hazards involve infectious materials: bloodborne pathogens, mold, bacteria, or improperly handled medical waste.
- Ergonomic hazards come from how work is physically performed: heavy lifting, repetitive motions, awkward postures, and prolonged standing or sitting.
- Psychosocial hazards relate to work conditions that cause stress or violence: understaffing, working alone, poorly lit areas, or contact with volatile individuals.
- Safety hazards are the classic accident risks: wet floors, blocked exits, frayed electrical cords, missing guardrails, and unguarded machinery.
When reviewing a scenario, mentally run through each category one at a time. This prevents the common mistake of spotting the most obvious hazard (a spill on the floor, for instance) and overlooking less visible ones (poor lighting, missing personal protective equipment, a blocked electrical panel).
Common Hazards That Appear in Training Scenarios
Certain hazards show up in scenario exercises repeatedly because they account for the most real-world injuries. Falls, slips, and trips caused 844 workplace fatalities in the U.S. in 2024 alone. Training scenarios lean heavily on these because they’re preventable and easy to miss if you’re not paying attention.
Here are the hazards most frequently built into scenario exercises:
- Wet or cluttered floors creating slip, trip, or fall risks
- Frayed cords or daisy-chained power strips indicating electrical hazards
- Blocked electrical panels (regulations require 36 inches of clearance in front of them)
- Unlabeled chemical containers or waste containers missing “Hazardous Waste” labels
- Workers without proper PPE such as gloves, goggles, or respirators in areas that require them
- Objects stored at heights without restraints or heavy items on high shelves
- Compressed gas cylinders not secured upright or stored without valve caps
- Blocked fire exits, missing extinguishers, or obstructed eyewash stations
- Workers lifting heavy objects with poor posture or performing repetitive tasks without breaks
- Missing or damaged safety signage
How to Read Chemical Warning Labels
Many scenarios include chemical containers with diamond-shaped pictograms from the Globally Harmonized System (GHS). There are nine pictograms, and recognizing them quickly helps you name the specific hazard:
- Flame: flammable materials, self-heating substances, or chemicals that emit flammable gas
- Flame over circle: oxidizers that can intensify a fire
- Exploding bomb: explosives or self-reactive chemicals
- Skull and crossbones: acutely toxic substances (fatal or toxic if swallowed, inhaled, or absorbed)
- Corrosion: causes skin burns, eye damage, or corrodes metals
- Gas cylinder: contents under pressure
- Health hazard (person with starburst on chest): long-term dangers like cancer risk, organ damage, or reproductive harm
- Exclamation mark: irritants, skin sensitizers, or substances harmful in lower doses
- Environment (dead fish and tree): toxic to aquatic life
If your scenario includes a container showing any of these symbols, name both the pictogram and the type of risk it represents. That’s usually what the question is testing.
Healthcare and Lab-Specific Hazards
If your scenario is set in a hospital or laboratory, the expected hazards shift. In healthcare settings, common scenario hazards include needles or sharps without safety features, recapping of used needles, missing spill management procedures, lack of PPE for chemical handling, and broken tiles or damaged flooring that affects patient transport. A study at a public hospital in India found that the absence of patient transfer aids like slide boards ranked among the top hazards identified, alongside missing standard operating procedures for chemical spills.
In laboratory scenarios, look for compressed gas cylinders that aren’t separated by hazard class, eyewash stations that aren’t within 10 seconds of the hazard area, chemical containers without clear content labels, and waste containers that aren’t marked as hazardous. These are drawn directly from standard lab inspection checklists and are the items most commonly “wrong” in a training scenario.
Ergonomic Hazards Are Easy to Overlook
Ergonomic risks are the ones students most commonly miss in scenario exercises because they don’t look dramatic. The CDC’s hazard identification checklist flags several specific triggers: working with hands raised above shoulder height, bending or twisting at the waist, sitting for more than 30 minutes without moving, standing continuously for more than 30 minutes, lifting objects over 50 pounds, and using a keyboard or mouse continuously for more than 30 minutes.
If your scenario shows a worker hunched over a desk, reaching overhead repeatedly, or lifting a heavy box with a rounded back, those are ergonomic hazards. The same applies to any task described as externally paced, meaning the worker can’t control the speed, which increases strain injury risk.
Psychosocial and Environmental Hazards
Some scenario questions test whether you can spot hazards that aren’t physical objects at all. Poorly lit corridors, parking lots, and work areas are recognized psychosocial hazards because they increase the risk of both accidents and workplace violence. Understaffing during high-traffic periods, unrestricted public access to secure areas, and workers operating alone in isolated locations all qualify.
If your scenario describes a dimly lit stockroom, a lone worker on a night shift, or an overcrowded waiting area with long service delays, those are legitimate hazards worth identifying.
A Step-by-Step Approach to Any Scenario
Rather than scanning randomly, use this sequence to work through any hazard identification exercise:
- Start with the floor and ground level. Look for spills, clutter, uneven surfaces, loose cables, and damaged flooring.
- Move to the work surfaces and equipment. Check for unlabeled containers, missing guards on machinery, unsecured gas cylinders, and overloaded power outlets.
- Look at the workers themselves. Are they wearing appropriate PPE? Are their postures safe? Are they performing tasks that involve repetitive motion or excessive force?
- Check the environment. Assess lighting, temperature, noise levels, ventilation, and whether exits and emergency equipment are accessible.
- Consider the work organization. Is anyone working alone? Are there signs of overcrowding, understaffing, or missing safety procedures?
This bottom-to-top, physical-to-organizational approach mirrors how professional safety assessments are conducted. In formal risk assessment, hazard identification is always the first step, followed by evaluating who might be harmed, how likely the harm is, and what controls should be in place. For a training scenario, you typically only need to complete that first step thoroughly: name every hazard you can find, classify it by category, and briefly explain why it’s dangerous.