NSC Hazard Recognition 5 — Questions and Answers
Question 1: Which of the following scenarios BEST illustrates a 'fall from elevation' hazard?
- A worker tripping over a cord on the ground floor
- A roofer working near an unguarded roof edge (Correct answer)
- A forklift driver on an incline
- A ladder stored improperly against a wall
Correct answer: A roofer working near an unguarded roof edge
Working near an unguarded roof edge creates a fall from elevation hazard, one of the leading causes of construction fatalities.
Question 2: What is the PRIMARY purpose of conducting a toolbox talk before a work shift?
- To review employee performance records
- To identify and communicate job-specific hazards workers may encounter (Correct answer)
- To assign overtime responsibilities
- To complete OSHA documentation requirements
Correct answer: To identify and communicate job-specific hazards workers may encounter
Toolbox talks raise hazard awareness by discussing safety topics relevant to the specific work being performed that day.
Question 3: Which of the following is an example of an electrical hazard?
- A coworker using incorrect lifting technique
- A damaged extension cord with exposed wiring in a wet area (Correct answer)
- An improperly stacked pallet in a storage area
- Excessive noise from a generator
Correct answer: A damaged extension cord with exposed wiring in a wet area
Damaged cords with exposed wiring in wet environments create serious electrical shock and electrocution hazards.
Question 4: During a hazard identification process, which sense is LEAST reliable for detecting all workplace hazards?
- Sight
- Hearing
- Touch (Correct answer)
- Smell
Correct answer: Touch
Touch is the least reliable method because hazards like hot surfaces, energized equipment, and chemicals can cause immediate injury before recognition.
Question 5: A worker in a printing facility is exposed to isopropyl alcohol vapors throughout the day. This is BEST categorized as which type of hazard?
- Ergonomic hazard
- Physical hazard
- Chemical hazard (Correct answer)
- Biological hazard
Correct answer: Chemical hazard
Isopropyl alcohol vapor is a chemical hazard that can cause respiratory irritation, headaches, and central nervous system effects.
Question 6: Which of the following is a key indicator that a safety culture includes strong hazard recognition practices?
- Workers only report hazards after an injury occurs
- Workers actively report near misses and unsafe conditions without fear of retaliation (Correct answer)
- Management conducts inspections once per year
- Hazard reports are kept confidential from employees
Correct answer: Workers actively report near misses and unsafe conditions without fear of retaliation
A strong safety culture encourages proactive hazard reporting, including near misses, to prevent injuries before they occur.
Question 7: Which of the following represents a radiation hazard workers might encounter in industrial settings?
- Repetitive use of a keyboard causing wrist strain
- Exposure to X-ray equipment used for weld inspection without shielding (Correct answer)
- Carbon monoxide from a gas-powered engine indoors
- Mold growth in a poorly ventilated area
Correct answer: Exposure to X-ray equipment used for weld inspection without shielding
Unshielded X-ray equipment used in nondestructive testing emits ionizing radiation, a recognized industrial radiation hazard.
NSC Hazard Recognition 5
Which of the following scenarios BEST illustrates a 'fall from elevation' hazard?