Halon Is a Gaseous Material That Inhibits

Halon is a gaseous material that inhibits the chemical reaction in fire. In most parts of the world, it is banned from new production except for military use because it contributes to ozone pollution and atmospheric effects. It was completely banned in Europe and Australia, which resulted in stockpiles being sent to the United States which still allows for use. Halon extinguishes fires by chemically reacting with the fire's components (fuel, oxygen and heat) and interrupts the reactions that allow the fire to continue. It is suitable for use in cold weather and leaves no residue. It is particularly good used on class A and B. fires, especially preventing flammable liquids from igniting.

There are several steps necessary to putting out an electrical fire, with the most critical being turning off the power (fuse box, etc.) if at all possible. To do this, ensure that one's hands are dry and the fire is not near the breaker box. It is best not to use water hoses for electrical fires because this can cause electrocution, and if possible use baking soda to smother the fire. However, before using any method, it is critical to turn off all power.

Part 3 -- OSHA regulations indicate that protection must be provided when sound levels exceed a certain level for a specified period of time; the longer the potential exposure, the lower the dBA response. OSHA implemented a rating system so that medium and long-term exposure to certain levels of sound will not damage the employee's hearing.

Part 4 -- Found is the varying pressure of a wave that travels through a medium (air, water, etc.). The number of variations per second is the frequency of sound, measure in Hertz (Hz) or cycles per second. The higher the frequency, the more high-pitched sound. Measuring sound in terms of a linear scale is inconvenient because of the variation in numbers (e.g. from 20 to 2 million). To avoid this, the logarithmic scale is used as a decibel (dB) scale. The relationship between numbers is not equal in a logarithmic scale is based on intervals between measurements rather than linear, or equal measures between values. For instance, loud music in a club or a textile mill would be about 100db, but would vary between 1,000,000 and 5,000,000 on a linear scale.