Bharat Aluminium Company (BALCO) Draughtsman Mechanical Interview Questions and Answers

Basic Maths, Science & Gk

Indian economy - 10 min

Q1. Difference between vs Refrigeration
Ans. 
Air conditioning is the process of altering the properties of air to make it more comfortable, while refrigeration is the process of removing heat from a space or substance.
• Air conditioning is used to cool and dehumidify indoor air for comfort.

• Refrigeration is used to preserve food, medicine, and other perishable items.

• Air conditioning uses a refrigerant to absorb heat from indoor air and release it outside.

• Refrigerati...read more
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Q2. Thermodynamics cycle.
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Q3. Material properties and usage in the real world
Ans. 
Material properties and usage are crucial in determining the performance and durability of products in the real world.
• Material properties such as strength, durability, and conductivity are important considerations in product design and development.

• Different materials have different properties and are suited for different applications. For example, steel is strong and durable, making it ideal for construction and manufa...read more
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Q4. Heat conduction vs Raidation
Ans. 
Heat conduction is the transfer of heat through a material, while radiation is the transfer of heat through electromagnetic waves.
• Heat conduction occurs in solids and liquids, while radiation can occur in vacuum or through transparent media.

• Heat conduction is slower than radiation.

• Examples of heat conduction include touching a hot stove or holding a warm cup of coffee, while examples of radiation include feeling the wa...read more
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Q1. Are you willing to relocate
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Q2. What is ur Expected CTC
Ans. 
My expected CTC is in line with industry standards and commensurate with my experience and skills.
• My expected CTC is based on my current salary, industry standards, and the responsibilities of the role.

• I have researched the market and have a realistic expectation for my salary.

• I am open to negotiation based on the overall compensation package.

• I am looking for a fair and competitive salary that reflects my experience an...read more
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1st round of interview was Aptitude test for 1 hr and topics were mostly logical analysis and quants

Topic was development of technology in India how it is going to affect

Q1. Define what is hooks law
Ans. 
Hook's law states that the force needed to extend or compress a spring by a certain distance is proportional to that distance.
• Force needed to extend or compress a spring is directly proportional to the displacement

• The formula for Hook's law is F = kx, where F is the force, k is the spring constant, and x is the displacement

• It is used to calculate the behavior of springs, elastic materials, and other systems under stres
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Q2. What is pearlite material
Ans. 
Pearlite is a two-phased lamellar structure composed of alternating layers of ferrite and cementite in carbon steel.
• Pearlite forms when austenite transforms during the cooling process of steel

• It is a common microstructure in carbon steels

• Pearlite provides strength and hardness to the steel

• It is often used in engineering applications for its desirable properties
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Q3. What is the composition of steel
Ans. 
Steel is primarily composed of iron and carbon, with small amounts of other elements like manganese, phosphorus, sulfur, and silicon.
• Steel is mainly made up of iron and carbon

• Carbon content typically ranges from 0.2% to 2.1%

• Other elements like manganese, phosphorus, sulfur, and silicon are also present in small amounts

• Alloying elements like nickel, chromium, and molybdenum can be added to enhance specific properties
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Q4. Tell me about yourself
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Q5. Which subject do you like most
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Q1. About your internship, what did you learn there, and they want to know about your additional skills like leadership and time management with priority
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Q2. You have to modify your answer in such a way that interviewer will ask from your answer.
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The aptitude test is conducted.

In a discussion on a specific topic, there is a group of five people present for the group discussion.

Q1. What is a transformer?
Ans. 
A transformer is an electrical device that transfers electrical energy between circuits through electromagnetic induction.
• Transforms voltage levels: Increases (step-up) or decreases (step-down) voltage.

• Used in power distribution: Essential for transmitting electricity over long distances.

• Consists of primary and secondary coils: Energy is transferred through magnetic fields.

• Example: A step-down transformer reduces 220V
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Q1. Past company details
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Q1. Furnace maintenance
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Q2. Hydraulic and pneumatic system
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Q1. PLC, HMI, sensor
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Q1. Motor, protection, relay
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Aptitude test was moderate ,

Group discussion happened online topic was ban on chinese apps

Q1. Whats the use of nonel , why it is use ?
Ans. 
Nonel is a type of non-electric initiation system used in blasting operations to detonate explosives.
• Nonel is used in mining, construction, and demolition industries.

• It is a safe and reliable method of initiating explosives without the need for electricity.

• Nonel consists of a shock tube filled with a small amount of explosive material that is initiated by a blasting cap.

• It allows for precise timing and sequencing of bl...read more
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Q2. What does safety means to you ?
Ans. 
Safety means ensuring the well-being and protection of individuals from harm or danger.
• Safety involves implementing measures to prevent accidents and injuries.

• It includes following protocols and guidelines to minimize risks.

• Safety also encompasses creating a culture of awareness and accountability.

• Examples: wearing personal protective equipment, conducting regular safety inspections, providing proper training.
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Q3. Why you opted mining engineering?
Ans. 
Passion for solving complex problems and interest in natural resources led me to choose mining engineering.
• Fascination with geology and earth sciences

• Desire to work in a challenging and dynamic industry

• Opportunity to contribute to sustainable resource extraction

• Interest in utilizing advanced technology in mining operations
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Very basic aptitude test, if you know basics about your field you'll pass through this round.

A moderate level GD, most of the elimination happen in this round, you only need to get one chance and tell your points

Q1. Tell me something about yourself
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Q2. Basic technical questions related to your field.
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