alleryStart learning →Per the source, the bulk of concrete aggregates is derived from which type of bed rock?
APyroclastic rocks
BSedimentary rocks
CMetamorphic rocks
DIgneous rocks
Answer & Solution
Correct answer: D. Igneous rocks
1. §2.2.2 describes igneous rocks as 'normally hard, tough and dense and therefore are a highly satisfactory source… bulk of aggregates are derived from them.'
2. Sedimentary and metamorphic rocks are listed as alternative but not primary sources.
_Source: IGNOU ET-522 Block-1 Unit-2 Aggregates, §2.2.2(i), p. 19_
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