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  2. Sheet vinyl flooring - Wikipedia

    en.wikipedia.org/wiki/Sheet_vinyl_flooring

    The thickness of the sheet and the wear layer determines the durability of the floor; unlike linoleum, vinyl flooring is usually not homogeneous, and once it wears through the print layer, it will be obviously damaged. Thinner floors may also tear. While it is possible to wax or otherwise resurface vinyl floors, it is not often done.

  3. Vinyl composition tile - Wikipedia

    en.wikipedia.org/wiki/Vinyl_composition_tile

    Vinyl floor tiling. Vinyl composition tile (VCT) is a finished flooring material used primarily in commercial and institutional applications. Modern vinyl floor tiles and sheet flooring and versions of those products sold since the early 1980s are composed of colored polyvinyl chloride (PVC) chips formed into solid sheets of varying thicknesses (1 ⁄ 8 in or 3.2 mm is most common) by heat and ...

  4. List of body armor performance standards - Wikipedia

    en.wikipedia.org/wiki/List_of_body_armor...

    Level 2 armor is medium-level protection suitable for extended wear and may be either overt or covert. This armor protects against stab threats with a strike energy of 33±0.60 J (24.3±0.44 ft·lbf). The overtest condition for this level is 50±0.70 J (36.9±0.51 ft·lbf). Level 3 is high-level protection suitable for wear in high risk ...

  5. Laminate flooring - Wikipedia

    en.wikipedia.org/wiki/Laminate_flooring

    This is an accepted version of this page This is the latest accepted revision, reviewed on 8 December 2024. Type of manufactured floor covering This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Laminate flooring" – news · newspapers · books ...

  6. Wear coefficient - Wikipedia

    en.wikipedia.org/wiki/Wear_coefficient

    In an experimental situation the hardness of the uppermost layer of material in the contact may not be known with any certainty, consequently, the ratio is more useful; this is known as the dimensional wear coefficient or the specific wear rate. This is usually quoted in units of mm 3 N −1 m −1. [5]

  7. Advanced Modular Armor Protection - Wikipedia

    en.wikipedia.org/wiki/Advanced_Modular_Armor...

    AMAP-R consists of two armour layers, called AMAP-R Level 1 and AMAP-R Level 2. Compared to conventional roof protection, which can have an aerial density of up to 450 kg/m 2, AMAP-R is very lightweight (Level 1 has an aerial density of only 25 kg/m 2, Level 1 and 2 together have an aerial density of 120 kg/m 2). The normal vehicle armour is ...

  8. Proof test - Wikipedia

    en.wikipedia.org/wiki/Proof_test

    A proof test is a form of stress test to demonstrate the fitness of a load-bearing or impact-experiencing structure. An individual proof test may apply only to the unit tested, or to its design in general for mass-produced items. Such a structure is often subjected to loads above those expected in actual use, demonstrating safety and design margin.

  9. Viscosity - Wikipedia

    en.wikipedia.org/wiki/Viscosity

    Viscosity is a measure of a fluid's rate-dependent resistance to a change in shape or to movement of its neighboring portions relative to one another. [1] For liquids, it corresponds to the informal concept of thickness; for example, syrup has a higher viscosity than water. [2]