10+ Vijaya Diagnostic Centre Interview Questions and Answers

The 3 main raw materials in the production of iron and steel are iron ore, coal, and limestone.

• Iron ore is the primary raw material used to produce steel.

• Coal is used as a fuel and reducing agent in the production of iron.

• Limestone is used as a flux to remove impurities from the iron ore during the smelting process.

Heat treatment is a process of heating and cooling metals to alter their physical and mechanical properties.

• The three stages of heat treatment are heating, soaking, and cooling.

• Heating is done to a specific temperature depending on the metal and desired outcome.

• Soaking is the holding of the metal at the desired temperature for a specific amount of time.

• Cooling can be done rapidly or slowly depending on the desired outcome.

• Examples of heat treatment processes include annealing...read more

The highest temperature in blast furnace is around 2300°F. It is called bf because it is used to produce pig iron.

• The temperature in blast furnace can reach up to 2300°F

• It is called bf because it is used to produce pig iron

• The process involves heating iron ore, coke, and limestone in a furnace

• The coke burns to produce carbon monoxide, which reacts with the iron ore to produce molten iron

• The limestone reacts with impurities in the iron ore to form slag

The melting point of iron is 1538°C and its atomic number is 26.

• Iron has a high melting point of 1538°C.

• Its atomic number is 26, which means it has 26 protons in its nucleus.

• Iron is a transition metal and is commonly used in construction and manufacturing.

DRI stands for Direct Reduced Iron, a type of iron produced from the reduction of iron ore.

• DRI is produced by removing oxygen from iron ore without melting it.

• It is used as a substitute for scrap in electric arc furnaces.

• DRI is also used as a feedstock in the production of steel.

• The process of producing DRI is known as the direct reduction process.

• DRI is also known as sponge iron.

Blast furnace is a type of furnace used for smelting to produce industrial metals. BF gas reaction produces carbon monoxide.

• Blast furnace is used for smelting iron ore into pig iron.

• It is a tall cylindrical structure made of steel and lined with refractory bricks.

• The BF gas reaction produces carbon monoxide, which is used as a fuel in various industries.

• The process involves the reduction of iron ore with coke and limestone.

• The molten iron is then drained from the bottom of th...read more

There are several types of iron ore found in India.

• Hematite is the most abundant and widely found iron ore in India.

• Magnetite is another important iron ore found in India.

• Limonite, Siderite, and Iron Pyrites are other types of iron ore found in India.

• India is one of the largest producers of iron ore in the world, with an estimated 2020 production of 206 million metric tons.

Slag is a byproduct of metal smelting process. Coke is used as fuel in blast furnace.

• Slag is a glass-like byproduct of metal smelting process

• It is formed when impurities in the metal ore combine with flux to form a molten mixture

• The mixture is then cooled and solidified to form slag

• Coke, a form of coal, is used as fuel in blast furnace to produce high temperatures needed for smelting

• Coke burns with a high intensity and produces a lot of heat, making it ideal for use in blast ...read more

Steel is an alloy of iron and carbon, with small amounts of other elements.

• Steel is a widely used material in construction, manufacturing, and transportation industries.

• The carbon content in steel can range from 0.2% to 2.1% by weight.

• Other elements such as manganese, chromium, and nickel are often added to improve the properties of steel.

• Different types of steel are produced by varying the composition and processing methods.

• Examples of steel products include beams, pipes, wi...read more