search
arrow-left Previous
Next arrow-right
Q: .
question image
  • A. A-2, B-3, C-1, D-4
  • B. A-1, B-4, C-2, D-3
  • C. A-2, B-1, C-4, D-3
  • D. A-3, B-1, C-2, D-4
Correct Answer: Option C - Granite– • It is igneous rock contains 50 to 60% quartz, 30 to 40% felspars and 10% mica with traces of mineral such as hornblende: pyroxene. • It is durable, hard and heavy specific gravity 2.6 to 2.9 and compressive strength 90-210 N/mm². • It is used for heavy construction such as dams. bridges, sea walls, light house etc. Marble – • It is metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. • Compressive strength is 70 to 140 N/mm². Hardness of 3 to 4 on moh's scale. • It is used for decorative and ornamental works of structures. It can be carved into required shape easily. Lime stone – • It consists chiefly of grains of calcium carbonate (calcite) cemented together by a matrix of the same material with small proportions of magnesium carbonate, iron and clay. • Siliceous limestone are compact, weather well and have granular structure. Specific gravity from 2.0 to 2.7. Compressive strength varies from 40 to 90 N/mm². • It is used extensively for manufacture of cement and lime. The quarry waste is used as road metal. Some times lime stone slabs used for paving, flooring and roofing. • Slate– • Metamorphic rocks consists of silica and alumina. • It is compact, hard, tough and durable gives metallic sound when strucked. Specific gravity: 2.89. Compressive strength : 70 to 200 N/mm². • Used as flooring and roofing material. Harder varieties used for dado work and steps of stairs
C. Granite– • It is igneous rock contains 50 to 60% quartz, 30 to 40% felspars and 10% mica with traces of mineral such as hornblende: pyroxene. • It is durable, hard and heavy specific gravity 2.6 to 2.9 and compressive strength 90-210 N/mm². • It is used for heavy construction such as dams. bridges, sea walls, light house etc. Marble – • It is metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. • Compressive strength is 70 to 140 N/mm². Hardness of 3 to 4 on moh's scale. • It is used for decorative and ornamental works of structures. It can be carved into required shape easily. Lime stone – • It consists chiefly of grains of calcium carbonate (calcite) cemented together by a matrix of the same material with small proportions of magnesium carbonate, iron and clay. • Siliceous limestone are compact, weather well and have granular structure. Specific gravity from 2.0 to 2.7. Compressive strength varies from 40 to 90 N/mm². • It is used extensively for manufacture of cement and lime. The quarry waste is used as road metal. Some times lime stone slabs used for paving, flooring and roofing. • Slate– • Metamorphic rocks consists of silica and alumina. • It is compact, hard, tough and durable gives metallic sound when strucked. Specific gravity: 2.89. Compressive strength : 70 to 200 N/mm². • Used as flooring and roofing material. Harder varieties used for dado work and steps of stairs

Explanations:

Granite– • It is igneous rock contains 50 to 60% quartz, 30 to 40% felspars and 10% mica with traces of mineral such as hornblende: pyroxene. • It is durable, hard and heavy specific gravity 2.6 to 2.9 and compressive strength 90-210 N/mm². • It is used for heavy construction such as dams. bridges, sea walls, light house etc. Marble – • It is metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. • Compressive strength is 70 to 140 N/mm². Hardness of 3 to 4 on moh's scale. • It is used for decorative and ornamental works of structures. It can be carved into required shape easily. Lime stone – • It consists chiefly of grains of calcium carbonate (calcite) cemented together by a matrix of the same material with small proportions of magnesium carbonate, iron and clay. • Siliceous limestone are compact, weather well and have granular structure. Specific gravity from 2.0 to 2.7. Compressive strength varies from 40 to 90 N/mm². • It is used extensively for manufacture of cement and lime. The quarry waste is used as road metal. Some times lime stone slabs used for paving, flooring and roofing. • Slate– • Metamorphic rocks consists of silica and alumina. • It is compact, hard, tough and durable gives metallic sound when strucked. Specific gravity: 2.89. Compressive strength : 70 to 200 N/mm². • Used as flooring and roofing material. Harder varieties used for dado work and steps of stairs