alleryStart learning →Which of the following is correctly listed as an ARTIFICIAL (synthetic) aggregate by the source?
ARiver-bed sand and gravel
BQuartzite from natural rock
CCrushed blast furnace slag
DGranite from natural rock
Answer & Solution
Correct answer: C. Crushed blast furnace slag
1. §2.2.1 names artificial/synthetic aggregates as 'crushed blast furnace slag, cinders, burned clay and coloured ceramic aggregates.'
2. Sand, gravel, granite and quartzite are listed as natural aggregates in the same section.
_Source: IGNOU ET-522 Block-1 Unit-2 Aggregates, §2.2.1, p. 19_
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