Jindal Aluminium Trainee Mechanical Engineer Interview Questions and Answers

Aptitude was done just after the Pre placement talk it was done on the phone via Microsoft form. The test had 20 questions of core mechanical engineering.

Then there was a GD round of 10 members group. Our topic was is EV is the future of India. I was the second person in the group to discus about the topic and i qualified that round for the next interview round.

Q1. What is heat treatment
Ans. 
Heat treatment is a process used to alter the physical and sometimes chemical properties of a material through controlled heating and cooling.
• Heat treatment involves heating a material to a specific temperature, holding it at that temperature for a certain amount of time, and then cooling it at a controlled rate.

• The purpose of heat treatment is to improve the material's hardness, strength, toughness, ductility, and oth...read more
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Q2. What are the types of gears
Ans. 
Types of gears include spur gears, helical gears, bevel gears, worm gears, rack and pinion gears, and planetary gears.
• Spur gears have straight teeth and are the most common type of gear.

• Helical gears have angled teeth for smoother and quieter operation.

• Bevel gears have cone-shaped teeth and are used to change the direction of rotation.

• Worm gears have a screw-like appearance and provide high gear reduction ratios.

• Rack a...read more
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Q3. Types of bearings
Ans. 
Bearings are components that allow for smooth rotation or linear motion between two parts.
• Types of bearings include ball bearings, roller bearings, plain bearings, and fluid bearings.

• Ball bearings use balls to reduce friction between two surfaces.

• Roller bearings use cylindrical rollers to support radial and axial loads.

• Plain bearings have a sliding surface instead of balls or rollers.

• Fluid bearings use a thin layer of
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Q4. What is Recrystallization temperature
Ans. 
Recrystallization temperature is the temperature at which a material undergoes recrystallization to relieve internal stresses.
• Recrystallization temperature is specific to each material and is influenced by factors such as composition, impurities, and processing history.

• It is the temperature at which new grains form within the material, replacing the deformed grains to reduce internal stresses.

• Recrystallization temperat...read more
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Q5. What is welding and its types
Ans. 
Welding is a process of joining two or more metal pieces together by melting and fusing them.
• Types of welding include MIG (Metal Inert Gas), TIG (Tungsten Inert Gas), Stick, and Flux-Cored welding.

• Welding can be done using different heat sources like gas flame, electric arc, laser, or ultrasound.

• Common welding techniques involve fusion welding, resistance welding, and solid-state welding.

• Examples of welded products inc...read more
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Q1. This round is CXO round which was done by the chief experience officer and the most difficult round as i got to know at that time from my friends. They were asking the core mechanical questions and checkin...read more
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