Choose first, then check both the answer and the reason.

11. What is clinker in the cement chain?

A. Intermediate processed material B. A port crane C. A crop variety D. A mining district

Answer A. Clinker forms after kiln processing before cement finishing.

12. Which of these is a dimension stone?

A. Groundnut B. Natural gas C. Fertiliser D. Granite

Answer D. Granite is quarried and polished for building and decorative uses.

13. Black Galaxy granite is linked with which AP locality?

A. Mangampeta B. Chimakurthy C. Sri City D. Gangavaram

Answer B. Prakasam's ODOP material identifies the Chimakurthy Black Galaxy cluster.

14. Chimakurthy is associated with which current district?

A. Annamayya B. Kakinada C. Prakasam D. Srikakulam

Answer C. The Black Galaxy ODOP source is Prakasam district.

15. Which mineral has a traditional electrical-insulation use?

A. Mica B. Chilli C. Barytes only D. Rice

Answer A. Mica's physical properties support insulation applications.

16. Why is an IBM occurrence entry not proof of an active mine?

A. IBM only maps sports B. All occurrences are ports C. Mines need no permission D. Occurrence and production are different stages

Answer D. A deposit can exist without a producing mine.

17. Bauxite is the main ore for which metal?

A. Steel B. Aluminium C. Copper D. Lead

Answer B. Bauxite is the principal aluminium ore.

18. What does a bauxite-resource share not establish?

A. Geological presence B. Potential interest C. Same-year mined output D. Need for a source date

Answer C. Resources and annual production are distinct measures.

19. Haematite and magnetite are types of which ore?

A. Iron ore B. Barytes C. Mica D. Granite

Answer A. Both are iron-bearing ores.

20. Why does Vizag Steel not prove an ore mine at the plant gate?

A. Steel is a crop B. It is in Telangana C. It is an SEZ list D. Factories can source raw material from elsewhere

Answer D. Materials may arrive by rail or port from other mining areas.