NMDC Limited Junior Engineer Interview Questions, Process, and Tips

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

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.

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

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

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

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

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

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.

Turbine generator work involves converting mechanical energy into electrical energy using steam or water.

• Turbine generators use steam or water to rotate a turbine connected to a generator

• The rotating turbine spins magnets inside the generator, creating an electric current

• The electric current is then transmitted through power lines for use in homes and industries