Match the components/processes in List I with their descriptions or roles in cement manufacturing in List II.
| List-I (Components/Processes) | List-II (Descriptions/Roles) |
|---|---|
| 1.Limestone | A.Added to control the setting time of cement |
| 2.Clinker | B.Raw material providing calcium carbonate |
| 3.Gypsum | C.Intermediate product formed after calcination |
| 4.Rotary Kiln | D.Equipment used for heating materials at high temperatures |
- A1-C, 2-B, 3-D, 4-A
- B1-B, 2-C, 3-A, 4-DCorrect
- C1-A, 2-D, 3-C, 4-B
- D1-D, 2-A, 3-B, 4-C
Solution
Concept
Manufacturing process
Step-by-step solution
1. Limestone: raw material (B). 2. Clinker: intermediate product (C). 3. Gypsum: controls setting (A). 4. Rotary kiln: heating equipment (D).
Explanation
Raw materials are burnt in the kiln to clinker, which is ground with gypsum.
Why the other options are wrong
Other codes swap the roles.
Shortcut
1-B, 2-C, 3-A, 4-D.
Correct answer: B) 1-B, 2-C, 3-A, 4-D