what is the difference between class 2 and class 3 safety vest?
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Safety vests are classified as Class 1, Class 2, or Class 3, based on the amount of both reflective material and high contrast (orange or lime color) fabric making up the vest. The degree of reflectivity in the tape and intensity of the background fabric colors are specified in the ANSI standard.
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Hazardous products are divided into two hazard groups: physical hazards and health hazards. The two hazard groups are further divided into hazard classes. Each hazard class contains at least one category.
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There is no difference between 2nd AC and 3rd AC side seats. Only difference is One curtain in 2nd AC. Then why railway is charging more? A)Length and breadth of berth vary from 3AC, You can roll on berths of 2AC unlike 3AC.
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Class II - Mild symptoms (mild shortness of breath and/or angina) and slight limitation during ordinary activity. Class III - Marked limitation in activity due to symptoms, even during less-than-ordinary activity, e.g. walking short distances (20—100 m). Comfortable only at rest.
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The two hazard groups are further divided into hazard classes. The physical hazard classes are described briefly below. Flammable gases Flammable aerosols Flammable liquids Flammable solids These four classes cover products that have the ability to ignite (catch fire) easily.
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Hazard group – While not given a formal definition, GHS divides hazards into three major groups – health, physical and environmental. Class – Class is the term used to describe the different types of hazards. For example, Gases under Pressure is an example of a class in the physical hazards group.
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ANSI 107. ANSI 107 requires vests to be highly visible or reflective, and others must be able to see the garment from a full 360 degrees. Class one vests are worn when the worker can devote his complete attention to traffic, which will not approach at speeds in excess of 25 mph.
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Insulation are divided into two main classes: Class 1 and Class 0 with different fire-rated properties. Class 1 refers to the insulation having fire-resistant properties while Class 0 refers to insulation being very fire-retardant.
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Two basic types of fall protection are travel restraint and fall arrest. Both involve wearing a full-body harness. A travel restraint system keeps you from getting too close to an unprotected edge. The lifeline and lanyard are adjusted to let you reach the edge but not fall over it.
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1st class welders are those coded eg to Asme etc or in Oz they have certification scheme called AS 1796 part 1 to 9. Which is harder than ASME, but once passed it is valid for life. 2nd class welders are general welders who have served their time (or not) or fabricators but have no codings or certification.
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Lately I have been wearing the D2 and D3 types. The difference between the two is that the D3 is cut looser, longer, and has a slight taper. These factors combined with the poly blend fabric make the D3's a better choice for work or dressier occasions.
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The main difference between a Class III hitch and a Class IV hitch is the capacities they set for the hitches. Class III hitches are rated for up to 6,000 lbs GTW with 600 lbs TW whereas a Class IV is rated for up to 12,000 lbs GTW and 1,000 TW. For more info on the hitch classifications check out the link I attached.
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Class III – These devices usually sustain or support life, are implanted, or present potential unreasonable risk of illness or injury. Examples of Class III devices include implantable pacemakers and breast implants. 10% of medical devices fall under this category.
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Some OSHA approved climbing helmets will be rated for electrical protection, and are divided into three classes: ... Class G or General hard hats do provide some protection from electrical hazards, but class E helmets are required when exposed to electrical hazards.
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Class 2 Appliances In Class 2 appliances, the user is protected by at least two layers of insulation. For this reason, Class 2 appliances are also known as Double Insulated. They do not require an earth connection. When PAT Testing Class 2 appliances, just the Insulation Resistance test is carried out.
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Class III - Marked limitation in activity due to symptoms, even during less-than-ordinary activity, e.g. walking short distances (20–100 m). Comfortable only at rest. Class IV - Severe limitations. Experiences symptoms even while at rest.
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3A refers to AC Third class (AC three tier) which is also air conditioned. 2S refers to Seater class and has chairs instead of berths. These coaches are not air-conditioned and are used for short journeys.