Orientation -- Respiratory And H2S Safety(English)

Explanation
The permissible exposure limit (PEL) for H2S gas is 10 PPM. This means that workers can be exposed to a maximum concentration of 10 parts per million of H2S gas in the air over an 8-hour workday without experiencing adverse health effects. Exceeding this limit can lead to various health issues, including respiratory problems, eye irritation, and even death in extreme cases. It is crucial for workers in industries where H2S gas is present to follow safety protocols and use appropriate personal protective equipment to prevent overexposure.

Explanation
SCBA (Self-Contained Breathing Apparatus) is the correct answer because it provides fresh air to breathe. Unlike dust masks or filtered respirators, SCBA systems have their own air supply, typically stored in a tank on the wearer's back. This ensures that the air being breathed is free from contaminants and is not dependent on the surrounding environment. SCBA is commonly used in hazardous or oxygen-deficient environments where the air quality may be compromised.

Explanation
Before putting on a respirator, it is crucial to ask yourself if it is the appropriate type for the task at hand. This is important because different respirators are designed for specific purposes, such as filtering out different types of contaminants or providing different levels of protection. Using the wrong type of respirator can be ineffective and may not provide adequate protection, putting your health at risk. Therefore, it is essential to ensure that you are using the right type of respirator for the job you are doing.

Explanation
A self-pressure fit test is a method used to ensure that a respirator fits properly on an individual's face. By conducting this test before putting on the respirator, the worker can ensure that there are no leaks or gaps that could compromise the effectiveness of the respirator. This test involves blocking the exhalation valve of the respirator and then exhaling forcefully to create a seal. If the respirator remains in place without any leakage, it indicates a proper fit. Therefore, it is true that a worker can do a self-pressure fit test on himself every time before putting on a respirator to ensure it fits correctly.

Explanation
Silica is indeed found in the sand that is used to frac a well. Fracking, or hydraulic fracturing, is a process used to extract oil or gas from deep underground. It involves injecting a mixture of water, sand, and chemicals into the well at high pressure to create fractures in the rock formation, allowing the oil or gas to flow more freely. The sand, known as frac sand, is used to prop open the fractures and prevent them from closing once the pressure is released. Silica, which is a common mineral found in sand, provides the necessary strength and stability to hold the fractures open. Therefore, the statement is true.

Explanation
A moustache only is allowable while working with a respirator because it does not interfere with the proper fit and seal of the respirator. Having a small amount of hair under the bottom lip may also be acceptable as long as it does not interfere with the seal. However, a goatee or a full beard can prevent the respirator from properly sealing against the face, compromising its effectiveness in protecting against airborne contaminants.

Explanation
When we reach the PEL (Permissible Exposure Limit) for H2S (Hydrogen Sulfide), our policy is to evacuate and move upwind. This means that we should move in the opposite direction of the wind, away from the source of the H2S gas. Moving upwind helps to minimize exposure to the gas and reduces the risk of inhaling it. By moving upwind, we ensure that we are moving towards cleaner and safer air.

Explanation
H2S, also known as hydrogen sulfide, is a highly toxic gas that can be found in various environments. It is commonly found in sewers, where it is produced by the decomposition of organic matter. It can also be found in tanks, such as storage tanks or industrial tanks, where it may be released as a byproduct of certain chemical reactions. Additionally, H2S can be present in dumps or waste areas, particularly where organic waste is decomposing. Therefore, the correct answer is "all of the above" as H2S can be found in sewers, tanks, and dumps or waste areas.

Explanation
If the presence of H2S is detected, it indicates the presence of hydrogen sulfide gas. Hydrogen sulfide is a toxic gas that can be harmful to human health, especially when inhaled. Therefore, to ensure the safety of individuals, smoking is not allowed in areas where H2S is present. Hence, the statement "If H2S is present, smoking is not allowed" is true.

Explanation
It is the opposite----when H2S ignites, it released SO2(sulfur dioxide)

Explanation
The end of a lit cigarette is hotter than the temperature at which H2S will ignite. This is because a lit cigarette can reach temperatures of around 600-900 degrees Celsius, while the ignition temperature of H2S is much lower, typically around 260 degrees Celsius. Therefore, the end of a lit cigarette has a higher temperature and is hotter than the ignition temperature of H2S.

Explanation
The given statement is false. While absorption is one possible route of H2S injury, the main threat of H2S injury is actually through inhalation. H2S is a highly toxic gas that can be easily inhaled, leading to various health issues such as respiratory problems, central nervous system damage, and even death. It is important to take proper precautions and avoid exposure to H2S to prevent injury.

Explanation
When H2S (hydrogen sulfide) reaches high levels, it can cause olfactory fatigue, also known as nose blindness. This means that a person's ability to smell the gas becomes impaired or lost entirely. This is why it is important to have proper monitoring and safety measures in place when working with or around H2S, as individuals may not be able to rely on their sense of smell to detect its presence.

Explanation
H2S is a very heavy gas, not a light gas, and it tends to settle in low places and dissolve in water. Therefore, the statement that it does not like to settle in low places or in water is incorrect.

Explanation
An H2S/gas monitor should be bump tested every month to ensure its accuracy and reliability. Bump testing involves exposing the monitor to a known concentration of gas to verify that it responds properly. Regular bump testing is necessary to identify any potential issues or malfunctions in the monitor, as well as to ensure that it is providing accurate readings. By conducting monthly bump tests, any problems can be detected and addressed promptly, ensuring the safety of the individuals relying on the monitor for gas detection.

Explanation
A respirator should be inspected before every use to ensure that it is in proper working condition and will provide the necessary protection. This inspection may include checking for any damage or wear on the respirator, ensuring that the straps and seals are intact, and verifying that the filters or cartridges are not expired or clogged. Regular inspections help to identify any issues or defects that could compromise the effectiveness of the respirator and allow for timely repairs or replacements to be made.