L.P. Book HAZMAT / Lesson #2 Hazardous Material – Ppe

The correct answer is "All of the above." This means that all of the given options are limitations to wearing an SCBA (Self-Contained Breathing Apparatus). SCBAs are heavy, have a limited air supply, and may impair movements in confined spaces. These limitations can make it challenging for individuals to wear and use SCBAs effectively in certain situations.

All of the statements mentioned in the options are limitations of positive-pressure supplied air respirators (SAR). First, they require supervision and monitoring of the air supply to ensure that the wearer is receiving sufficient clean air. Second, the hose that supplies the air is limited to a maximum length of 300 feet, which restricts the mobility of the wearer. Lastly, SARs are not approved for use in atmospheres that are immediately dangerous to life or health (IDLH), unless they are equipped with an emergency egress unit. Therefore, all of the above statements are correct and explain the limitations of positive-pressure supplied air respirators.

High temperature protective clothing is designed to provide a high degree of protection from radiant heat. This means that it is specifically created to shield the wearer from intense heat sources such as flames or hot surfaces. Additionally, this type of clothing typically has limited mobility and flexibility, which can be attributed to the thick and heavy materials used to provide the necessary protection. Therefore, the correct answer is "Both a & b" because high temperature protective clothing offers protection from radiant heat and also has limited mobility and flexibility.

Positive pressure breathing apparatus (SCBA) must be worn until the Incident Commander determines through air monitoring that it is no longer required. This is because SCBA provides a continuous supply of clean air to the wearer, creating a positive pressure inside the mask that prevents any contaminated air from entering. It is crucial to wear SCBA until the Incident Commander confirms that the air is safe to breathe, as hazardous materials can be present in the environment even if they are not immediately visible or detectable. This ensures the safety of the wearer and prevents any potential health risks.

The correct answer is "Not designed to protect from harmful gases, vapors, liquids, or dusts encountered during hazardous materials incidents." Structural firefighting gear is not specifically designed to provide protection against the hazardous substances typically encountered during hazardous materials incidents. It may not have the necessary barrier properties or filtration capabilities to effectively protect the wearer from harmful gases, vapors, liquids, or dusts. Therefore, relying solely on structural firefighting gear for hazardous materials operations would not provide adequate protection.

Vapor protective clothing must be decontaminated before opening to ensure that any hazardous substances or contaminants on the clothing are removed. This is important to prevent the spread of contaminants to the wearer or the environment when the clothing is removed. Failure to decontaminate the clothing before opening could lead to exposure to hazardous substances. Therefore, it is necessary to decontaminate the clothing before opening it.