NMDC Limited Junior Associate Interview Questions and Answers

Written test on general knowledge

Q1. It was on education, general knowledge and on stores and purchase functions.
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Q1. There was no round 3 interview
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Q1. Types of compressor Working of compressor
Ans. 
Compressors are devices that increase the pressure of a gas or vapor.
• Types of compressors include reciprocating, rotary screw, centrifugal, and axial flow compressors.

• Reciprocating compressors use pistons to compress gas, while rotary screw compressors use screws.

• Centrifugal compressors use a rotating impeller to increase gas velocity, while axial flow compressors use blades to compress gas.

• Compressors work by reducing...read more
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Q2. Pump working functions Winder engine part name
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Pump working functions involve moving fluids from one place to another. Winder engine part name varies depending on the type of engine.
• Pump working functions include suction, discharge, and pressure generation.

• Winder engine part names can include crankshaft, camshaft, piston, and connecting rod.

• Examples of pumps include centrifugal pumps, positive displacement pumps, and jet pumps.
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Q3. How to start compressor On/off switch
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To start a compressor, turn on the on/off switch and wait for the compressor to build up pressure.
• Locate the on/off switch on the compressor.

• Turn the switch to the 'on' position.

• Wait for the compressor to build up pressure before using it.

• If the compressor has a pressure gauge, wait for it to reach the desired pressure level before using it.

• If the compressor has a safety valve, make sure it is not open before starting
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Q4. Electric supply Transformer
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Q1. What is 5S,TPM,7 Qc tools ?
Ans. 
5S, TPM, and 7 QC tools are methodologies used in manufacturing to improve efficiency and quality.
• 5S is a workplace organization method that involves sorting, simplifying, sweeping, standardizing, and sustaining.

• TPM stands for Total Productive Maintenance and is a system for maintaining and improving equipment and processes.

• 7 QC tools are a set of problem-solving tools used to identify and solve quality-related issues....read more
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Q2. Knowledge of Battery Assembly
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Q1. Whats your current salary ?
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Q2. How much you expect from here ?
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Q1. Say something about press filter
Ans. 
Press filter is a device used for separating solids from liquids.
• It works by applying pressure to the mixture to force the liquid through a filter media while retaining the solids.

• It is commonly used in industries such as chemical, pharmaceutical, and food processing.

• Examples of press filters include belt filter press, plate and frame filter press, and rotary vacuum-drum filter.

• Press filters are efficient and cost-effe...read more
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Q2. How to maintain pressure in press filter
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To maintain pressure in press filter, ensure proper sealing, check for leaks, and adjust feed rate and pressure settings.
• Check for proper sealing of the filter plates and gaskets

• Inspect for any leaks in the system and repair them promptly

• Adjust the feed rate and pressure settings as per the manufacturer's recommendations

• Regularly clean and maintain the filter to prevent clogging and pressure drop

• Monitor the pressure ga...read more
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Q3. What is the model of hydraulic cylinder in press filter
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The model of hydraulic cylinder in press filter depends on the specific press filter being used.
• The model of hydraulic cylinder can vary depending on the size and capacity of the press filter.

• Some common models of hydraulic cylinders used in press filters include tie rod cylinders and welded cylinders.

• The specific model of hydraulic cylinder used in a press filter can be determined by consulting the manufacturer's spec...read more
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Q4. Which type bearing use in bogie wheel
Ans. 
Roller bearings are commonly used in bogie wheels.
• Roller bearings are preferred over plain bearings due to their ability to handle heavy loads and reduce friction.

• Tapered roller bearings are commonly used in locomotive bogie wheels.

• Cylindrical roller bearings are also used in some bogie wheels.

• The type of bearing used depends on the specific application and load requirements.
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Q1. Previous work experience
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Q2. How is gratuity calculated
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Gratuity is calculated based on an employee's length of service and last drawn salary.
• Gratuity is a lump sum amount paid to an employee as a token of appreciation for their service.

• The calculation of gratuity depends on the number of years an employee has worked for an organization.

• In India, gratuity is calculated using the formula: (Last drawn salary × 15 × number of years of service) / 26.

• The number of years of servi...read more
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Q1. What are the Self motor
Ans. 
Self motor is not a commonly used term in electrical engineering.
• It is possible that the interviewer meant to ask about self-starting motors, which are motors that can start without external assistance.

• Another possibility is that they were referring to self-excited motors, which generate their own magnetic field without the need for a separate excitation source.

• It is important to clarify the question with the interview
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Q2. What are thae Altnater
Ans. 
Alternators are electrical generators that convert mechanical energy into electrical energy.
• Alternators are commonly used in vehicles to charge the battery and power the electrical system.

• They work by using a rotating magnetic field to induce an electrical current in a stationary coil of wire.

• Alternators are more efficient and reliable than traditional generators.

• They are also smaller and lighter, making them ideal for...read more
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Q3. What are the Battery
Ans. 
Batteries are devices that store chemical energy and convert it into electrical energy.
• Batteries come in various sizes and types, including alkaline, lithium-ion, and lead-acid.

• They are commonly used in electronic devices, vehicles, and backup power systems.

• Batteries have a positive and negative terminal, and the flow of electrons between them creates an electrical current.

• The capacity of a battery is measured in amper
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Q1. Building construction
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Q2. Road construction
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Q1. Related our Work experience
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Q1. Related our Qualification
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