ArcelorMittal Nippon Steel Electrical Engineer Interview Questions, Process, and Tips

Mathematics,reasoning,science

Q1. Machine,network,electronics
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Q2. Logic gates, binary code
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Q3. What is working pricniple of induction motor?
Ans. 
An induction motor works on the principle of electromagnetic induction to generate rotating magnetic fields.
• Induction motor has a stator with a set of windings that are connected to an AC power source.

• When AC current flows through the stator windings, it creates a rotating magnetic field.

• This rotating magnetic field induces current in the rotor windings, causing the rotor to rotate.

• The speed of the rotor rotation is sl...read more
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Q4. Symbol of all logic gates??
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The symbols of logic gates include AND gate (&), OR gate (|), NOT gate (!), XOR gate (^), NAND gate (|), NOR gate (&), and XNOR gate (=).
• AND gate symbol: &

• OR gate symbol: |

• NOT gate symbol: !

• XOR gate symbol: ^

• NAND gate symbol: |

• NOR gate symbol: &

• XNOR gate symbol: =
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Q1. Power factor What is vfd Difference between ac and dc motor
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Power factor is the ratio of real power to apparent power in an AC circuit. VFD stands for Variable Frequency Drive. AC motors run on alternating current while DC motors run on direct current.
• Power factor is a measure of how effectively electrical power is being used in a circuit.

• It is calculated by dividing the real power (in watts) by the apparent power (in volt-amperes).

• A power factor of 1 indicates that all the pow...read more
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Q2. Types of load cell
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Types of load cells include strain gauge load cells, hydraulic load cells, and capacitive load cells.
• Strain gauge load cells measure the strain or deformation of a material.

• Hydraulic load cells use hydraulic fluid to measure force.

• Capacitive load cells measure changes in capacitance to determine force.

• Other types of load cells include piezoelectric load cells and pneumatic load cells.
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Q1. What is your favourite subject?
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Q2. Different types of starter
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Starters are used to control the starting and stopping of motors. Different types of starters are used based on the motor's power rating and application.
• Direct On-Line (DOL) Starter

• Star-Delta Starter

• Auto Transformer Starter

• Soft Starter

• Variable Frequency Drive (VFD) Starter
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Q3. Parallel operations of transformer
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Parallel operation of transformers refers to connecting two or more transformers with the same voltage ratio and frequency to supply a common load.
• Parallel operation increases the capacity of the system and provides redundancy.

• The transformers must have the same voltage ratio, impedance, and phase angle.

• Proper synchronization is necessary to avoid circulating currents.

• Parallel operation can be achieved by using a commo...read more
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