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ArcelorMittal Nippon Steel
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I applied via Recruitment Consulltant and was interviewed in Dec 2023.Β There was 1 interview round.
Improving power factor helps in reducing energy losses, increasing system efficiency, and reducing electricity costs.
Improving power factor reduces the amount of reactive power flowing in the system, which in turn reduces energy losses.
Higher power factor means more efficient use of electricity and less strain on the electrical system.
Improving power factor can lead to reduced electricity costs for consumers and utilit...
Buccholz relay is a protective device used in oil-filled transformers to detect faults such as internal arcing or overheating.
Buccholz relay is installed in the oil pipe connecting the transformer tank and conservator tank.
It works based on the principle that gas is generated when a fault occurs in the transformer, causing oil level to drop and gas to accumulate in the relay.
The relay consists of two float switches - o...
DP in Siemens communication stands for Distributed Peripherals.
DP is a communication protocol used by Siemens for connecting distributed peripherals to a central control system.
It allows for real-time data exchange between the peripherals and the control system.
DP is commonly used in industrial automation applications.
Examples of DP communication modules include DP/DP couplers and DP slaves.
To communicate S7 PLC and ABB drive using Profibus, you need to configure the Profibus network, set up the communication parameters, and establish the communication link.
Configure the Profibus network by setting the correct baud rate, address, and other network parameters.
Set up the communication parameters on both the S7 PLC and ABB drive to ensure they are compatible with each other.
Establish the communication link b...
I applied via Recruitment Consulltant and was interviewed in Jan 2024.Β There were 2 interview rounds.
I applied via Job Portal and was interviewed in Nov 2023.Β There were 2 interview rounds.
A turbine is a machine that converts the energy from a fluid flow into mechanical energy.
Turbines are commonly used in power plants to generate electricity from steam or water flow.
There are different types of turbines such as steam turbines, gas turbines, and water turbines.
Turbines have blades that are rotated by the fluid flow, causing a shaft to spin and generate power.
The mechanical energy produced by turbines can
A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.
Used for smelting iron ores to produce iron
Consists of a furnace chamber with a stack and tuyeres
Operates at high temperatures using coke as fuel
Produces molten iron and slag as byproducts
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
Consists of two coils of wire, known as primary and secondary coils
Primary coil is connected to a power source, while secondary coil is connected to the load
Works on the principle of electromagnetic induction to change voltage levels
Used to step up or step down voltage levels in electrical systems
Ex...
Types of transformers include step-up, step-down, isolation, autotransformer, and distribution transformers.
Step-up transformer increases voltage levels
Step-down transformer decreases voltage levels
Isolation transformer provides electrical isolation between primary and secondary windings
Autotransformer has a single winding with multiple taps for different voltage levels
Distribution transformer is used to supply power t
Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
Transformers have two coils of wire, known as primary and secondary coils, which are wound around a core made of ferromagnetic material.
When an alternating current flows through the primary coil, it creates a changing magnetic field around the coil.
This changing magnetic field induces a voltage in ...
Resistance is the opposition to the flow of electric current in a material.
Resistance is measured in ohms (Ξ©).
It is caused by collisions between electrons and atoms in a material.
Materials with high resistance are insulators, while materials with low resistance are conductors.
Resistance can be calculated using Ohm's Law: R = V/I, where R is resistance, V is voltage, and I is current.
Diodes are electronic components that allow current to flow in one direction only. Common types include PN junction diodes, Zener diodes, Schottky diodes, and light-emitting diodes (LEDs).
PN junction diodes: Basic diodes that allow current to flow in one direction only.
Zener diodes: Diodes that operate in the reverse breakdown region and are used for voltage regulation.
Schottky diodes: Diodes with a lower forward volta...
Power factor is a measure of how effectively electrical power is being used in a circuit.
Power factor is the ratio of real power (kW) to apparent power (kVA) in an electrical circuit.
It indicates how efficiently power is being converted into useful work.
A power factor of 1 (or 100%) means all the power is being used effectively, while a power factor of 0 means none of the power is being used efficiently.
Power factor ca...
A DC motor is a type of electric motor that runs on direct current electricity, converting electrical energy into mechanical energy.
DC motors have a rotating armature and a stationary field magnet
They operate based on the principle of Lorentz force
Common types include brushed and brushless DC motors
DC motors are widely used in various applications such as robotics, electric vehicles, and industrial machinery
AC motors use alternating current and are more commonly used for industrial applications, while DC motors use direct current and are often used in household appliances.
AC motors use alternating current, while DC motors use direct current
AC motors are more commonly used in industrial applications, while DC motors are often used in household appliances
AC motors are generally more efficient and require less maintenance co...
An electromagnetic field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field.
Consists of electric and magnetic components
Generated by electric charges and currents
Can be static or dynamic
Used in various applications such as wireless communication and MRI machines
Types of motors include DC motors, AC motors, synchronous motors, and induction motors. Each type operates based on different principles.
DC motors operate using direct current and have a commutator to switch the current direction, examples include brushed and brushless DC motors.
AC motors operate using alternating current and include types like synchronous motors and induction motors.
Synchronous motors rotate at a cons...
VFD stands for Variable Frequency Drive, a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the motor.
VFDs are used to control the speed and torque of AC motors in various applications.
They are commonly used in HVAC systems, industrial pumps, fans, and conveyor systems.
VFDs can improve energy efficiency by matching the motor speed to the actual load requirements.
Th...
Earthing is the process of connecting electrical equipment to the earth to prevent electric shocks and ensure safety.
Earthing provides a path for fault currents to flow safely into the ground.
It helps in protecting equipment and individuals from electrical faults.
Earthing reduces the risk of fire hazards in electrical systems.
Types of earthing include plate earthing, pipe earthing, and rod earthing.
Proper earthing is e...
Types of motors include DC motors, AC motors (induction, synchronous), stepper motors, and servo motors. Each type operates based on different principles.
DC motors operate on the principle of Lorentz force, where a current-carrying conductor experiences a force in a magnetic field.
AC induction motors work on the principle of electromagnetic induction, where a rotating magnetic field induces current in the rotor.
AC sync...
A contactor is an electrical device used to switch an electrical circuit on or off.
Contactor is typically used in applications where high current needs to be controlled, such as in industrial machinery.
It consists of a coil which when energized creates a magnetic field that pulls in a set of contacts to make or break the circuit.
Contactor can be controlled manually or automatically through a control system.
Common examp...
Cooking and crawling are terms used in electrical engineering to describe the movement of a circuit breaker's contacts.
Cooking refers to the slow separation of the contacts when the circuit breaker is opened under load.
Crawling refers to the movement of the contacts due to the presence of small currents even when the circuit breaker is in the closed position.
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I was interviewed before Feb 2024.
ArcelorMittal Nippon Steel interview questions for popular designations
I applied via Naukri.com and was interviewed in Feb 2024.Β There was 1 interview round.
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
Consists of primary and secondary coils
Changes voltage levels (step-up or step-down)
Used in power distribution systems
Examples: power transformers, distribution transformers
CRO stands for Cathode Ray Oscilloscope, a device used to display and analyze the waveform of electrical signals.
CRO is commonly used by electricians and engineers to troubleshoot electrical circuits.
It displays voltage waveforms in real-time, allowing users to identify issues such as voltage spikes or distortions.
CROs are essential tools for testing and measuring electronic equipment.
Example: A CRO can be used to anal...
A motor is a device that converts electrical energy into mechanical energy to produce motion.
Motors are commonly used in various applications such as industrial machinery, household appliances, and vehicles.
There are different types of motors including AC motors, DC motors, and servo motors.
Motors consist of a rotor and a stator, with the rotor rotating when electrical current is applied.
Examples of motors include elec...
Get interview-ready with Top ArcelorMittal Nippon Steel Interview Questions
A relay is an electrically operated switch that uses an electromagnet to mechanically operate a switch.
Relays are used to control high power circuits with low power signals, such as in automotive applications.
They can be used to control multiple circuits with a single signal.
Relays are commonly used in industrial automation, telecommunications, and power systems.
Examples of relays include electromagnetic relays, solid-
I applied via campus placement at Indira Gandhi Institute of Technology, Dhenkanal and was interviewed in Apr 2024.Β There was 1 interview round.
I applied via Company Website and was interviewed in Sep 2023.Β There were 4 interview rounds.
Preventive maintenance is a proactive approach to maintenance that involves regularly inspecting, servicing, and repairing equipment to prevent breakdowns and extend its lifespan.
Preventive maintenance involves scheduled inspections and maintenance tasks.
It aims to identify and address potential issues before they cause equipment failure.
Examples of preventive maintenance include lubricating moving parts, replacing wor...
I applied via Approached by Company and was interviewed in Dec 2023.Β There was 1 interview round.
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