Quality or grade

Quality or grade
(of coal)
  An informal classification of coal relating to its suitability for use for a particular purpose. Refers to individual measurements such as heat value, fixed carbon, moisture, ash, sulfur, major, minor, and trace elements, coking properties, petrologic properties, and particular organic constituents. The individual quality elements may be aggregated in various ways to classify coal for such special purposes as metallurgical, gas, petrochemical, and blending usages.
  U.S. Dept. of Energy, Energy Information Administration's Energy Glossary

Energy terms . 2014.

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  • grade up — transitive verb : to improve the quality or grade of by gradual degrees spent much money grading up his herd of cattle : improve, raise important that we grade up the standard of scholarship …   Useful english dictionary

  • Grade inflation — is the supposed increase over time of academic grades, faster than any real increase in standards.It is frequently discussed in relation to U.S. education, and to GCSEs and A levels in England and Wales. Prevalence Grade inflation is often… …   Wikipedia

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  • quality — qual·i·ty n pl ties 1: a special, distinctive, or essential character: as a: a character, position, or role assumed those acts of ownership, which the person called to the succession can only do in quality of heir Louisiana Civil Code b: the… …   Law dictionary

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