Jindal Metals & Alloys Quality Assurance Incharge Interview Questions and Answers

Q1. What is the chromium percentage in steel?
Ans. 
Chromium percentage in steel varies depending on the type of steel, typically ranging from 10.5% to 30%.
• Chromium is added to steel to improve its corrosion resistance and hardenability.

• Stainless steel typically contains around 10.5-30% chromium.

• Examples of chromium-containing steel include 304 stainless steel (18% chromium) and 420 stainless steel (12% chromium).
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Q2. Sulphur Advantages and Disadvantages in Steel
Ans. 
Sulphur can improve machinability and strength in steel, but can also lead to brittleness and reduced ductility.
• Advantages of sulphur in steel include improved machinability, allowing for easier cutting and shaping of the material.

• Sulphur can also enhance the strength of steel, making it more suitable for certain applications.

• Disadvantages of sulphur in steel include increased brittleness, which can lead to cracking an...read more
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Q1. What are the Grain structures of steel at different temperatures?
Ans. 
Grain structures of steel change at different temperatures affecting its properties.
• At room temperature, steel has a fine grain structure which provides good strength and toughness.

• As temperature increases, the grain size also increases, leading to reduced strength and toughness.

• At high temperatures, steel can have a coarse grain structure which may result in lower mechanical properties.

• Grain refinement techniques like...read more
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Q2. What is the final/finished product temperature of Rebar?
Ans. 
The final/finished product temperature of Rebar is typically room temperature.
• Rebar is typically stored and used at room temperature

• The temperature of Rebar can vary depending on the environment it is stored in

• Rebar is not typically heated or cooled as part of the manufacturing process
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Q1. Percentage of chromium in steel?
Ans. 
Chromium content in steel typically ranges from 10-30% depending on the grade and type of steel.
• Chromium is added to steel to improve its corrosion resistance, hardness, and strength.

• Stainless steel typically contains around 10-30% chromium.

• High-chromium steels, such as tool steels, can contain up to 30% chromium.

• Chromium content can vary based on the specific grade and application of the steel.
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Q2. Advantages and Disadvantage of Sulphur in steel?
Ans. 
Sulphur in steel can improve machinability but may reduce ductility and impact strength.
• Advantages: Improved machinability, easier to cut and shape

• Disadvantages: Reduced ductility, impact strength, and toughness

• Sulphur content should be controlled to avoid negative effects on mechanical properties

• Examples: Lead-free cutting steels often contain higher sulphur levels for better machinability
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Q1. Grades of steel and Their Chemical Composition
Ans. 
Different grades of steel have varying chemical compositions to meet specific requirements.
• Grades of steel include carbon steel, alloy steel, and stainless steel.

• Carbon steel typically contains 0.05-2.0% carbon.

• Alloy steel contains additional elements like nickel, chromium, and molybdenum.

• Stainless steel has high chromium content for corrosion resistance.

• Each grade has unique properties based on its chemical compositio
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Q2. Sectional weight of steel for different sizes
Ans. 
Sectional weight of steel varies based on the size of the steel section.
• The sectional weight of steel is calculated by multiplying the volume of the steel section by the density of steel.

• Different sizes of steel sections have different sectional weights.

• For example, a 100mm x 100mm x 10mm steel section will have a different sectional weight compared to a 150mm x 150mm x 12mm steel section.
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Q3. What are the grains and grain structures inside the steel at different temperatures?
Ans. 
Grains in steel change in size and shape at different temperatures, affecting its properties.
• At high temperatures, grains in steel are larger and more irregularly shaped.

• As steel cools, grains become smaller and more uniform, leading to increased strength and hardness.

• Grain boundaries can affect properties like toughness and corrosion resistance.

• Examples: Austenite has smaller grains at lower temperatures, resulting in...read more
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Q1. About fabrication
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Q1. About family and personal life
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Coding questions based on core Java and DSA

Multiple Choice questions concerning Mechanical, Metallurgy departments

Q1. Introduction Whether you worked in any plant for experience gauging ? questions regarding thermodynamics cycles
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Q2. Questions regarding Boilers such as what other parts were present in Boilers ? Why are they mounted ?
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Q1. All electrical appliance drive ,electrical equipment......
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Q1. Edcuition qualification
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Q1. What is my designation.
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Q1. What is DVC, and UTM
Ans. 
DVC stands for Data Version Control and UTM stands for Universal Testing Machine.
• DVC is a system for managing and versioning data sets for machine learning projects.

• UTM is a machine used to perform tensile, compression, and bending tests on materials.

• DVC helps track changes in data, code, and models in a project.

• UTM measures the mechanical properties of materials such as strength, elasticity, and toughness.
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Q2. What is the most important in lab
Ans. 
The most important aspect in a lab is accuracy and precision in testing procedures.
• Accuracy and precision in testing procedures ensure reliable results

• Adherence to quality control measures is crucial

• Proper calibration and maintenance of equipment is essential

• Following standard operating procedures (SOPs) is key to consistency

• Regular training and education for lab staff is important
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About electricity , calculation , electrical calculations ,

Q1. Output voltage in 16 kv single phase t/f ?
Ans. 
The output voltage in a 16 kV single phase transformer is 16 kV.
• Output voltage in a 16 kV single phase transformer is 16 kV

• The voltage remains constant in a single phase transformer

• Output voltage is determined by the turns ratio of the transformer
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Q2. What is the voltage ratings ?
Ans. 
Voltage ratings refer to the maximum voltage that a device or component can safely handle.
• Voltage ratings are important for ensuring the safety and proper functioning of electrical equipment.

• They are typically specified in volts (V) and can vary depending on the type of equipment.

• Exceeding the voltage rating can lead to damage or failure of the device.

• For example, a common voltage rating for household appliances is 120...read more
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