61.
None of the following is determined in a proximate analysis except
Answer: A
Correct answer: ash content
The proximate analysis determines four things: moisture, volatile matter, ash, and fixed carbon by difference. Hydrogen, nitrogen and sulphur are elemental determinations and belong to the ultimate analysis. The distinction is worth holding on to - the proximate analysis describes how the coal will behave in the furnace, the ultimate one gives the composition from which the air requirement and calorific value are calculated.
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