Discussion
Analysis of coal in which the assay of moisture, ash, volatile matter and fixed carbon is determined by standard test method is known as :
Answer: B
This is proximate analysis.
Proximate analysis reports moisture, ash, volatile matter and fixed carbon (by difference), determined by standard heating tests. It is the routine way to assess the rank and quality of a coal.
Ultimate analysis is the elemental analysis, giving carbon, hydrogen, nitrogen, sulphur and oxygen. Thermal shock is a property of materials under sudden heating, not a coal analysis, and assay is the general word for analysing an ore, not the name of this test.
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