NLC India Limited Additional General Manager Interview Questions and Answers

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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Prepare the core subjects som Thermo fluids and asked some of the manufacturing process

How we can reduce the use of non renewable resources

Q1. Hooks law, modulus of rigidity,stress strain curve
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Q2. About your industrial training
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Basic exam with some technical questions

Group of 6 were given a topic and we discussed.

Q1. Difference between structural bridge and concrete bridge?
Ans. 
Structural bridges can be made of various materials while concrete bridges specifically use concrete as the primary material.
• Structural bridges can be made of steel, wood, or other materials, while concrete bridges are primarily made of concrete.

• Concrete bridges are known for their durability and strength, making them a popular choice for infrastructure projects.

• Structural bridges may require more maintenance and upkee...read more
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Q2. Howrah bridge structure?
Ans. 
The Howrah Bridge is a cantilever bridge that spans the Hooghly River in West Bengal, India.
• Built in 1943, it is one of the busiest bridges in the world, carrying over 100,000 vehicles and countless pedestrians daily.

• The bridge does not have any nuts or bolts and is held together by rivets.

• It is a famous landmark in Kolkata and is often referred to as the 'Gateway of Kolkata'.
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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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Discussion about Industry vs agriculture

Q1. About Projects and pumps
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Q2. About Wagon tipper and mechanism
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Easy technical and aptitude questions. They follow examveda.

Peer pressure boon or bane

Q1. What is Bayer process
Ans. 
The Bayer process is a method for refining bauxite into alumina, which is the precursor to aluminum production.
• The Bayer process involves crushing and grinding bauxite ore, then mixing it with sodium hydroxide at high temperatures to dissolve the alumina content.

• The resulting solution is filtered to remove impurities, then cooled and seeded to promote the precipitation of pure alumina hydrate.

• The alumina hydrate is the...read more
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Q2. What, according to you, most important dimensionless number and why
Ans. 
The most important dimensionless number is the Reynolds number, as it determines the flow regime of a fluid and is crucial in fluid dynamics.
• Reynolds number is used to predict flow patterns in different fluid flow situations

• It is defined as the ratio of inertial forces to viscous forces in a fluid flow

• Reynolds number helps in determining whether the flow is laminar, turbulent, or transitional

• It is widely used in engine...read more
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Q3. One equation that correlates HT and Fluid flow
Ans. 
The equation that correlates HT and fluid flow is the Darcy-Weisbach equation.
• The Darcy-Weisbach equation relates the head loss due to friction in a pipe to the velocity and diameter of the pipe, as well as the friction factor.

• It is commonly used in fluid mechanics and hydraulic engineering to calculate pressure drop in pipes.

• The equation is expressed as: hL = f * (L/D) * (V^2/2g), where hL is the head loss, f is the f...read more
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Q4. Systems in thermodynamics
Ans. 
Systems in thermodynamics refer to the specific region of space or a quantity of matter under study.
• A system can be open, closed, or isolated based on the exchange of matter and energy with its surroundings.

• Examples of systems include a gas in a container, a piston-cylinder assembly, or a steam turbine.

• Thermodynamic properties such as temperature, pressure, and volume are used to describe the state of a system.

• The firs...read more
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Q5. What is dry steam and wet steam
Ans. 
Dry steam has low moisture content and high temperature, while wet steam has high moisture content and lower temperature.
• Dry steam is produced when water is heated to its boiling point and vaporizes without any liquid water droplets present.

• Wet steam contains water droplets suspended in the steam, resulting in a lower temperature compared to dry steam.

• Dry steam is commonly used in steam turbines for power generation, w...read more
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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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