Hazard Control

Correct Answer: Install engineering controls such as improved ventilation systems.

Installing engineering controls such as improved ventilation systems is the most effective measure because it eliminates or significantly reduces the hazard at the source. This approach provides a more permanent solution and does not rely on worker behavior. In contrast, providing personal protective equipment like respirators relies on proper usage by workers and does not eliminate the chemical fumes. Implementing administrative controls by rotating shifts can limit exposure time but does not reduce the overall hazard. Conducting training sessions is essential for awareness but does not directly address the source of the hazard.

Correct Answer: Immediately stop all work in the hazardous area and notify the safety officer for further inspection and corrective action.

The best course of action is to immediately stop all work in the hazardous area and notify the safety officer for further inspection and corrective action. This is because safety should always be the top priority on a construction site. Continuing work in a hazardous area puts workers at risk of injury or even death. The safety officer is the expert who can properly assess the situation and determine the necessary steps to mitigate the hazard. Notifying team members and providing PPE is not sufficient, as it does not address the root cause of the problem and still exposes workers to potential danger. Proceeding with work and periodically monitoring the faulty wiring is also unacceptable, as it allows the hazard to persist and risks the safety of the workers. Delaying notification to the safety officer to avoid disrupting the schedule prioritizes the project timeline over worker safety, which is never acceptable.

Correct Answer: Elimination

The correct answer is 'Elimination'. Elimination is the most effective method in the hierarchy of hazard controls. It involves completely removing the hazard from the workplace, thus eliminating the risk at its source. This approach provides the highest level of protection and should be the first option considered when addressing workplace hazards. Here's why the other options are incorrect: 'Substitution' involves replacing a hazardous substance or process with a less hazardous alternative. While effective, it doesn't completely eliminate the hazard. 'Engineering controls' are physical changes to the workplace that isolate people from hazards. These controls reduce exposure to hazards but do not eliminate them entirely. 'Administrative controls' are changes in work procedures such as written safety policies, rules, supervision, schedules, and training. These methods rely on human behavior and do not remove the hazard from the workplace.