Jindal Steel and Power Graduate Engineer Interview Questions and Answers

Q1. About Electronics subjects
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Q2. About languages which I know
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Q1. About ece and specialization
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Q2. About project and ece
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Q1. What is TTT DIAGRAM and its use
Ans. 
TTT diagram is a Time-Temperature-Transformation diagram used in materials science to understand the transformation of phases in a material.
• TTT diagram shows the relationship between temperature, time, and phases in a material during cooling or heating.

• It helps in predicting the microstructure and properties of a material based on its cooling rate.

• TTT diagrams are commonly used in heat treatment processes for metals li...read more
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Q2. What is difference between ceramic and steel
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Ceramic is a non-metallic material made from clay, while steel is a metallic material primarily made from iron and carbon.
• Ceramic is non-metallic, while steel is metallic

• Ceramic is made from clay, while steel is primarily made from iron and carbon

• Ceramic is typically more brittle than steel

• Steel is stronger and more durable than ceramic

• Ceramic is often used for decorative purposes or in high-temperature applications, w...read more
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Q3. What is fatigue and what is creep in materials
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Fatigue is the weakening of a material due to repeated loading, while creep is the gradual deformation of a material under constant stress.
• Fatigue is the process of progressive and localized structural damage that occurs when a material is subjected to cyclic loading.

• Creep is the time-dependent deformation of a material under constant load or stress.

• Fatigue failure is often characterized by crack initiation and propaga...read more
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Q4. What are the different types of Steel making
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Different types of steel making include basic oxygen furnace, electric arc furnace, and open hearth furnace.
• Basic Oxygen Furnace (BOF) - uses oxygen to reduce the carbon content in the steel

• Electric Arc Furnace (EAF) - uses electricity to melt scrap steel and produce new steel

• Open Hearth Furnace - uses a fuel-air mixture to heat the steel and remove impurities

• Other methods include Bessemer process, direct reduced iron,
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Q5. Why do we use alloying elements during Steel making and what are their applications
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Alloying elements are used in steel making to improve properties like strength, hardness, corrosion resistance, and machinability.
• Alloying elements are added to steel to enhance specific properties such as strength, hardness, toughness, and corrosion resistance.

• Common alloying elements include chromium, nickel, manganese, molybdenum, and vanadium.

• Chromium is added to improve corrosion resistance, nickel for toughness, ...read more
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Q6. What is SN curve ?
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SN curve is a graphical representation of the relationship between stress and fatigue life of a material.
• SN curve shows the number of cycles to failure (N) against the applied stress (S).

• It helps in determining the fatigue life of a material under different stress levels.

• Materials with higher fatigue strength have a steeper slope on the SN curve.

• SN curves are commonly used in engineering to predict the durability of ma
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Q7. What is the composition of pigiron
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Pig iron is an intermediate product of the iron industry, made by smelting iron ore in a blast furnace.
• Pig iron is typically around 92-94% iron, with varying amounts of carbon, silicon, manganese, sulfur, and phosphorus.

• It is brittle and not suitable for use in its raw form, but can be further processed into wrought iron or steel.

• The carbon content of pig iron gives it a high carbon equivalent, making it ideal for cast...read more
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Q8. What is lever rule?
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Lever rule is a principle used in material science to determine the relative amounts of two phases in a two-phase system.
• Lever rule is used to calculate the fraction of each phase in a two-phase system based on the weight or volume percentages of the phases.

• It is commonly used in metallurgy, ceramics, and other material science fields.

• The lever rule equation is: L = (C - A) / (B - A), where L is the fraction of one pha...read more
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It consists of three parts .. verbal, numerical and other ... Followed by an domain specific test.

Q1. Tell about yourself
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Q2. Questions related to project. ( Better to have a project done in steel plant or atleast visiting a steel plant and know what's happening there and different processes .... on other projects they were least...read more
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Q3. Questions on SOM
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Q4. For me no hr questions were asked
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Q5. Questions related to manufacturing process
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Q1. How blast furnace works ?
Ans. 
Blast furnace is a smelting furnace used to extract iron from iron ore.
• Iron ore, coke, and limestone are added to the top of the furnace.

• Hot air is blown into the bottom of the furnace to create a high temperature.

• The coke reacts with the hot air to produce carbon monoxide, which reduces the iron ore to iron.

• The limestone reacts with impurities in the iron ore to form slag, which is removed from the bottom of the furna...read more
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Q2. What is sinter? And how to make sinter in sinter plant and
Ans. 
Sinter is a high-quality raw material used in blast furnaces. It is made by heating iron ore fines and other materials.
• Sintering is a process of compacting and forming a solid mass of material by heat or pressure without melting it.

• In a sinter plant, iron ore fines, coke breeze, limestone, and other additives are mixed and granulated.

• The granulated mixture is then fed onto a sinter machine, where it is heated to form a...read more
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Q3. What is the different sizes of sinter?
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Sinter is a porous material formed by heating a mixture of iron ore fines, limestone, and coke breeze. The size of sinter varies depending on its intended use.
• Sinter is used in the production of iron and steel.

• The size of sinter can range from small pellets to large blocks.

• The size of sinter is determined by the size of the sintering machine used.

• Sinter can be classified into different sizes such as fine, coarse, and l...read more
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Q4. Which iron forms in blast furnace?
Ans. 
The iron formed in blast furnace is pig iron.
• Pig iron is the product of smelting iron ore with coke and limestone in a blast furnace.

• It is a brittle material with high carbon content and contains impurities like sulfur, phosphorus, and silicon.

• Pig iron is further processed to produce steel or cast iron.

• The composition of pig iron varies depending on the quality of the iron ore and the process used in the blast furnace.
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Aptitude test is about general knowledge and mechanical subjects

Q1. Asked everything about resume, projects I did and core questions
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Q1. General HR question and are you ready to relocate.
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