Multiple choice

Which of the following is/are important raw material(s) in cement industry?

  1. Limestone

  2. Gypsum and Clay

  3. Clay

  4. Limestone and Clay
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cement industry requires limestone (calcium carbonate) and clay (silica and alumina sources) as the two primary raw materials. These are heated in a kiln to form clinker, which is then ground with gypsum to produce cement. Individual materials alone (A or C) are insufficient, and gypsum (option B) is added later, not as a primary raw material.

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