CSO - Common Safety Orientation Hazard Recognition and Control Questions and Answers — Questions and Answers
Question 1: According to the hierarchy of controls, which of the following actions is considered the most effective method for controlling a hazard?
- Replacing a toxic cleaning chemical with a non-toxic alternative.
- Requiring workers to wear respirators and chemical-resistant gloves.
- Posting warning signs in the area where the hazardous chemical is used.
- Physically removing the hazardous substance from the workplace entirely. (Correct answer)
Correct answer: Physically removing the hazardous substance from the workplace entirely.
The hierarchy of controls ranks hazard control methods from most to least effective. Elimination, which is physically removing the hazard, is at the top and is the most effective control measure because it removes the hazard source completely.
Question 2: A worker on a construction site notices a large, unsecured puddle of oil on a main walkway, creating a significant slip hazard. What is the most appropriate immediate action for the worker to take?
- Clean up the spill themselves, regardless of their training.
- Assume someone else has already reported it and walk around it.
- Barricade or guard the area to prevent others from entering and report the hazard to their supervisor. (Correct answer)
- Wait until the end of their shift to report the near miss.
Correct answer: Barricade or guard the area to prevent others from entering and report the hazard to their supervisor.
The first priority is to prevent immediate harm to others. The worker should take steps to isolate the hazard (e.g., by standing guard or using available materials to create a barrier) and then promptly report it to a supervisor so it can be properly addressed by trained personnel. This aligns with the principles of personal accountability and reporting hazards covered in CSO training.
Question 3: Which of the following is best classified as an ergonomic hazard?
- A frayed electrical cord on a power tool.
- Loud, continuous noise from machinery.
- Poorly designed workstations that require workers to perform tasks in awkward postures. (Correct answer)
- Exposure to airborne viruses in a healthcare setting.
Correct answer: Poorly designed workstations that require workers to perform tasks in awkward postures.
Ergonomic hazards relate to the design of the work environment and tasks that can cause strain on the body over time. A poorly designed workstation forces awkward postures, which can lead to musculoskeletal injuries. Frayed cords are safety hazards, loud noise is a physical hazard, and viruses are biological hazards.
Question 4: Installing a guardrail around an elevated platform is an example of which type of hazard control?
- Substitution
- Personal Protective Equipment (PPE)
- Engineering Control (Correct answer)
- Administrative Control
Correct answer: Engineering Control
Engineering controls are methods that are built into the design of a plant, equipment, or process to minimize the hazard. A guardrail is a physical structure that isolates people from the fall hazard, making it an engineering control.
Question 5: Which of the following is a primary goal of conducting a worksite hazard assessment?
- To assign blame for previous incidents.
- To fulfill a training requirement without taking action.
- To identify existing and potential dangers in order to implement controls and prevent incidents. (Correct answer)
- To exclusively focus on what PPE workers should be wearing.
Correct answer: To identify existing and potential dangers in order to implement controls and prevent incidents.
The fundamental purpose of a hazard assessment is to proactively identify and evaluate workplace hazards so that effective control measures can be implemented to prevent accidents, injuries, and illnesses.
Question 6: A team is tasked with working in a noisy environment where the sound level consistently exceeds safe limits. According to the hierarchy of controls, what is the LEAST effective, last-resort option for protecting the workers?
- Replacing the noisy machine with a quieter model (Substitution).
- Providing all workers with properly fitted earplugs (PPE). (Correct answer)
- Building a soundproof enclosure around the machine (Engineering Control).
- Rotating workers so each individual spends less time in the noisy area (Administrative Control).
Correct answer: Providing all workers with properly fitted earplugs (PPE).
Personal Protective Equipment (PPE) is always considered the last line of defense in the hierarchy of controls. While necessary when other controls can't eliminate the risk, it is the least effective because it relies on individual compliance and does not remove or reduce the hazard itself.
CSO - Common Safety Orientation Hazard Recognition and Control Questions and Answers
According to the hierarchy of controls, which of the following actions is considered the most effective method for controlling a hazard?