Iron And Steel

Rationale: Bhilai Steel Plant in Chhattisgarh was established in 1955 with Soviet collaboration. Rourkela was set up with West German help, and Durgapur with British assistance.

Rationale: VISL at Bhadravati (Karnataka) originally used wood charcoal from nearby forests and hydroelectric power from the Cauvery/Jog falls because of the absence of coking coal nearby.

Rationale: To produce one ton of steel, massive quantities of heavy raw materials like iron ore, coking coal, and limestone are consumed, resulting in a weight-loss ratio (material index > 1) that pulls the industry toward raw material sources.

Rationale: Rashtriya Ispat Nigam Limited (RINL) at Visakhapatnam is India's first shore-based integrated steel plant, facilitating easy import of coking coal and export of finished products.

Rationale: Rourkela Steel Plant in Odisha receives its iron ore from the Barsua and Sundargarh mines and coal from Jharia and Talcher.

Rationale: Bokaro is in Jharkhand (1-B), Durgapur is in West Bengal (2-A), Bhilai is in Chhattisgarh (3-D), and Rourkela is in Odisha (4-C).

Rationale: SAIL (Steel Authority of India Limited) is the apex public sector undertaking that manages major integrated steel plants like Bhilai, Bokaro, Durgapur, Rourkela, and Burnpur.

Rationale: Mini steel plants use electric arc or induction furnaces, relying on scrap steel and sponge iron, making them flexible, decentralized, and less capital-intensive than integrated plants.

Rationale: The Damodar River valley, often called the 'Ruhr of India', provides essential water resources and transport linkages for steel and industrial belts in Jharkhand and West Bengal.

Rationale: MMTC is the premier trading house handling mineral exports (like iron ore to Japan) and imports (like coking coal).

Rationale: When the material index is greater than 1, the weight of raw materials exceeds the weight of the product, making transport costs of inputs higher and pulling the factory toward the raw material source.

Rationale: Tata Iron and Steel Company (TISCO) was established by Jamsetji Tata at Sakchi (later Jamshedpur) in 1907, marking the birth of modern industrial steel production in India.

Rationale: Odisha, backed by massive iron ore deposits in Keonjhar, Sundargarh, and Mayurbhanj, along with major investments, has emerged as a top producer of steel in India.

Rationale: Limestone is used as a flux in blast furnaces; it melts and combines with silica and other acidic impurities in the iron ore to form slag, which is then removed.

Rationale: Alloy Steels Plant (ASP) in Durgapur and Salem Steel Plant specialize in alloy, tool, and stainless steels required for specialized engineering applications.

Rationale: Due to high mineral concentration, coal reserves, and dense industrial activity, the Chotanagpur plateau region is famously designated as the 'Ruhr of India'.

Rationale: India possesses abundant iron ore, but a major structural vulnerability is the scarcity of prime coking coal, requiring substantial imports.

Rationale: IISCO's main integrated steel works is located at Burnpur near Asansol in West Bengal, now operated under SAIL.