The classification of tribometers is based upon the arrangement of contact produced or the developer of equipment. The different types of tribometer include Bouncing ball, Four ball, and the Pin on disc (Khosla, 2012). The Bouncing ball tribometer is composed of a ball that is fixed on a surface at a given angle. It is used to determine the reaction of lubricant under high temperatures. A Four ball tribometer allows repetition of testing because of the arrangement of the ball one on top while the three at the bottom make it suitable for repeatable actions. The Pin on disc tribometer has a static pin at the bottom of an applied load which is connected with a rotating disc. Among the discussed tribometers, the Four ball tribometer can be considered to be the best slip resistance of a surface. This is because it is used to identify extreme pressure, lubricants friction actions and preventive wear properties.
The major cause of tripping in a walking surface is the presence of an obstruction in walkways. Another cause is uneven surfaces or changes in elevation. Obstructions might be in the form of uncovered electrical cords, open drawers, or even boxes left by the aisles. A change in elevation with the slightest inch is enough to cause a trip. Cracking of sidewalks, curbs, ramps and single stepping are all forms of elevation change hazards (Oshkosh, 2014). Engineering controls can help in the design of the building by preventing accidents that might results from obstruction such as electrical cords. However, engineering controls are unable to avoid accidents of tripping resulting from changes in elevation because they happen unexpectedly. The changes in the walking surface, however, can be renovated earlier if the problem is detected and reported to the relevant authority.
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References
Khosla, Vishal. (2012). Tribometer and its Uses. Retrieved from ezinearticles.com/?Tribometer-and-its-uses&id=7360496
Oshkosh. (2014). Environmental Health and Safety. Retrieved from www.uwosh.edu/ehs/campus-health-and-safety/general-safety/occupational-safety/accident-prevention-slips-trips-and-falls
