SSC MTS EXAM

Detailed explanation-1: -All industrial and manufacturing work comes under secondary sector and activities and converting iron ore to steel is an industrial activity. Hence it comes under secondary activity.

Detailed explanation-2: -Iron Ore, coal and lime stone are put in a blast furnace and melted to extract the metal. This process is called smelting. The iron that is extracted from the furnace is refined. This extract is called steel.

Detailed explanation-3: -Iron is manufactured in a blast furnace. First, iron ore is mixed with coke and heated to form an iron-rich clinker called ‘sinter’. Sintering is an important part of the overall process as it reduces waste and provides an efficient raw material for iron making. Coke is produced from carefully selected grades of coal.

Detailed explanation-4: -3.1 Blast furnace. 3.2 Decarburization. 3.3 Calcination. 3.4 Hot blast.