NMDC Limited Junior Engineer Interview Questions, Process, and Tips

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
Ans. 
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
Ans. 
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. Cricket knowledge?
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Q2. Current affairs
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Q1. My trade related
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Q2. What is Ohm's law?
Ans. 
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor.
• Ohm's law is represented by the formula V = I * R, where V is voltage, I is current, and R is resistance.

• It helps in calculating the current flowing through a circuit when the voltage and resistance are known.

• It can also be used to determi...read more
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Diploma last semester assignment

Q1. Technical questions
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Q2. Reasoning questions
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Q3. Science questions
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Q4. English question
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Q5. Mathematics question
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Q1. Introduction about your self
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Q1. Previous work experience required questions
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Q1. Working technical questions
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Q1. Family background and all
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Q1. Volume find tank
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