ArcelorMittal Nippon Steel Interview Questions, Process, and Tips

Q1. Tell us which type of transformer is better and test runs to be conducted before installing new transformer.
Ans. 
Oil-filled transformers are better due to higher efficiency and lower maintenance requirements. Test runs should include insulation resistance, turns ratio, and load testing.
• Oil-filled transformers are better than dry-type transformers due to higher efficiency and lower maintenance requirements.

• Test runs should include insulation resistance testing to check for any insulation breakdown.

• Turns ratio testing should be con...read more
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Q2. How many RIO panels and number of DI/DO and AI/AO channels provided in Blast Furnace. During commissioning of blast furnace what were the major problems you faced?
Ans. 
The Blast Furnace is equipped with multiple RIO panels and a variety of DI/DO and AI/AO channels.
• The Blast Furnace typically has several RIO panels installed for monitoring and control purposes.

• The number of DI/DO channels provided in a Blast Furnace can vary depending on the specific setup and requirements.

• During commissioning, major problems may include issues with sensor calibration, communication errors, or softwar...read more
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Q3. Which all types of drives you have worked on? During ID run of motor with drive which parameters are measured and which parameters numbers in drive.
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Q1. How many projects you have completed.
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Q2. How many years of maintenance experience. Are you willing to transfer. Are you willing to take task in new department. Expected CTC
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Q1. This one is regarding the expectations and what they can provide.
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Stores Operations process and Scarp disposal

Q1. Stores Operations process
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Q1. Tell me about yourself
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Q2. You know about AM/NS . What is the product of AM/NS
Ans. 
AM/NS is a joint venture between ArcelorMittal and Nippon Steel Corporation, producing a wide range of steel products.
• AM/NS produces various steel products such as hot-rolled, cold-rolled, and coated steel sheets.

• They also manufacture steel plates, pipes, and tubes for various industries.

• AM/NS offers specialized products like electrical steel for transformers and automotive steel for car manufacturers.
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Q1. Explain the audit system approch to the PDCA
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Q2. Geographical visit the working site, understand the process of working and operation and identified the gaps and recommend the scope of improvement as per Plan - Do- Check - Act
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Q1. Any other option to electrical se
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Q2. Transformers, conveyor breakers and maintenance, feeder breakers and maintenance charges LOTO
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Q1. How to work d.o.l starter
Ans. 
A Direct-On-Line (DOL) starter is used to start and stop electric motors by connecting them directly to the power supply.
• DOL starters are simple and cost-effective for small motors, typically up to 5-10 HP.

• They consist of a contactor, overload relay, and start/stop push buttons.

• When the start button is pressed, the contactor closes, allowing current to flow to the motor.

• The overload relay protects the motor from overhe...read more
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Q2. D.o.l starter diagram
Ans. 
A D.O.L. starter diagram illustrates the direct-on-line starting method for electric motors.
• D.O.L. stands for Direct-On-Line, used for starting small to medium-sized motors.

• The diagram typically includes a motor, contactor, overload relay, and power supply.

• When the start button is pressed, the contactor closes, allowing current to flow to the motor.

• Overload relays protect the motor from overheating by disconnecting pow...read more
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Q3. How to work ac motor
Ans. 
AC motors convert electrical energy into mechanical energy using alternating current, enabling various industrial applications.
• AC motors operate on the principle of electromagnetic induction.

• They consist of a stator (stationary part) and a rotor (rotating part).

• The stator generates a rotating magnetic field when AC voltage is applied.

• The rotor, placed within the magnetic field, experiences torque and starts to rotate.

• C...read more
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