Safety Trained Supervisor Hazard Control Principles Questions and Answers 1 — Questions and Answers
Question 1: According to the hierarchy of controls, which of the following is considered the MOST effective method for controlling a hazard?
- Personal Protective Equipment (PPE)
- Administrative Controls
- Engineering Controls
- Elimination (Correct answer)
Correct answer: Elimination
The hierarchy of controls ranks hazard control methods from most to least effective. Elimination, which physically removes the hazard, is at the top and is considered the most effective method because it removes the risk of exposure entirely.
Question 2: A supervisor at a construction site observes workers being exposed to loud noise from a piece of machinery. Implementing a 'buy quiet' program and purchasing newer, quieter equipment is an example of which type of hazard control?
- Substitution (Correct answer)
- Administrative Control
- Elimination
- Personal Protective Equipment (PPE)
Correct answer: Substitution
Substitution involves replacing a hazardous material or process with a less hazardous one. In this scenario, replacing the noisy equipment with a quieter model is a direct example of substitution.
Question 3: Which of the following is an example of an administrative control for hazard management?
- Installing machine guards on a rotating shaft.
- Providing hearing protection to employees.
- Rotating workers through a high-noise area to limit exposure time. (Correct answer)
- Replacing a toxic solvent with a non-toxic alternative.
Correct answer: Rotating workers through a high-noise area to limit exposure time.
Administrative controls are changes in work procedures or policies to reduce exposure. Job rotation is a classic example of an administrative control that limits the duration of a worker's exposure to a hazard.
Question 4: A manufacturing facility installs a local exhaust ventilation (LEV) system to capture welding fumes at the source. This is an example of what type of hazard control?
- Personal Protective Equipment (PPE)
- Engineering Control (Correct answer)
- Substitution
- Administrative Control
Correct answer: Engineering Control
Engineering controls are physical changes to the work environment or equipment to isolate workers from hazards. A local exhaust ventilation system is a prime example of an engineering control because it physically removes the hazardous fumes from the breathing zone of the worker.
Question 5: In the context of the hierarchy of controls, Personal Protective Equipment (PPE) is considered the last line of defense. When is it most appropriate to rely on PPE?
- As the primary and sole method of hazard control.
- When it is the cheapest option available.
- When engineering and administrative controls are not feasible or do not provide sufficient protection. (Correct answer)
- To avoid the need for employee training on hazard awareness.
Correct answer: When engineering and administrative controls are not feasible or do not provide sufficient protection.
PPE is considered the least effective control and should be used as a last resort. It is appropriate when higher-level controls like elimination, substitution, and engineering controls are not feasible, or to supplement other controls that do not fully eliminate the risk.
Question 6: A supervisor is conducting a job hazard analysis (JHA) for a task that involves working at heights. After implementing guardrails around the work area, what is the next most appropriate control to consider?
- Requiring all workers to wear personal fall arrest systems. (Correct answer)
- Scheduling the work for a time when fewer people are on site.
- Training workers on the risks of falling.
- Eliminating the need to work at height by pre-fabricating components on the ground.
Correct answer: Requiring all workers to wear personal fall arrest systems.
Guardrails are an engineering control. While effective, they may not eliminate all fall risks. The next step in the hierarchy would be to consider administrative controls like training, but since a physical fall hazard remains, providing personal protective equipment (PPE) in the form of a personal fall arrest system is the most appropriate next control to ensure worker safety. While elimination is the best option, the scenario implies the work at height is still necessary after the guardrails are in place.
Safety Trained Supervisor Hazard Control Principles Questions and Answers 1
According to the hierarchy of controls, which of the following is considered the MOST effective method for controlling a hazard?