Steel Production

Q. Explain the classification of industries on the basis of size.

Q. The process of heating metals beyond their melting point is called

1. smelting
2. levitation
3. blasting
4. cooking

Q. What does it take to make one tonne of steel?

1. 10 tonnes of coal, 4 tonnes of iron ore and 1 tonne of limestone
2. 8 tonnes of coal, 5 tonnes of iron ore and 1 tonne of limestone
3. 8 tonnes of coal, with 4 tonnes of iron ore and 1 tonne of limestone
4. 8 tonnes of coal, 4 tonnes of iron ore and 2 tonne of limestone

Q. What are the inputs used in manufacturing steel ?

1. Iron Ore
2. Silica
3. Coal
4. Limestone

Q. The process of heating metals beyond their melting point is called metal melting.

1. True
2. False

Q. The process of smelting is done in a _______.

1. blast furnace
2. bloomery
3. open hearth furnace
4. carburizing

Q. What is the output obtained from the iron and steel industry?

1. Steel
2. Iron ore
3. Pig iron
4. All of the above

Q. The process of smelting is done in a _______.

1. blast furnace
2. bloomery
3. open hearth furnace
4. carburizing

Q. The process of heating metals beyond their melting point is called metal melting.

1. True
2. False

Q. What does it take to make one tonne of steel?

1. 10 tonnes of coal, 4 tonnes of iron ore and 1 tonne of limestone
2. 8 tonnes of coal, with 4 tonnes of iron ore and 1 tonne of limestone
3. 8 tonnes of coal, 4 tonnes of iron ore and 2 tonne of limestone
4. 8 tonnes of coal, 5 tonnes of iron ore and 1 tonne of limestone

Q. Which industries are also known as village or household industries?

1. Cottage industries
2. Large scale industries
3. Small scale industries
4. Joint sector industries

Q. Name the process of extracting metals from their ores by heating them beyond the melting point.

1. Roasting
2. Concentration
3. Smelting
4. Calcination