ArcelorMittal Nippon Steel PPC Engineer Interview Questions and Answers

Q1. How to know if Hydraulic cylinder leakage
Ans. 
Check for hydraulic cylinder leakage by inspecting for oil puddles, decreased performance, and abnormal noises.
• Inspect the area around the hydraulic cylinder for oil puddles or stains

• Monitor the performance of the hydraulic system for any decrease in efficiency

• Listen for any abnormal noises coming from the hydraulic cylinder during operation
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Q2. What is NAS
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NAS stands for Network Attached Storage, which is a type of storage device that connects to a network to provide shared storage space.
• NAS devices are typically used for storing and sharing files, data backups, and media streaming within a network.

• NAS devices can be accessed by multiple users and devices simultaneously over a network.

• NAS devices often have their own operating system and can run various applications such...read more
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Q1. What is the use of lubricant in roling mill
Ans. 
Lubricant in rolling mills reduces friction between metal surfaces, prevents wear and tear, and improves efficiency.
• Lubricant reduces friction between metal surfaces in rolling mills

• Prevents wear and tear on machinery

• Improves efficiency by reducing energy consumption

• Helps in cooling the metal during the rolling process

• Examples: oil-based lubricants, grease, graphite-based lubricants
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Q2. What are the major cause of roll broken
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The major causes of roll breakage in maintenance engineering include material defects, improper setup, excessive tension, and foreign objects.
• Material defects such as weak spots or impurities can weaken the roll and lead to breakage.

• Improper setup or alignment of the roll can cause uneven stress distribution and eventual breakage.

• Excessive tension on the roll can exceed its load-bearing capacity and cause it to break.

• F...read more
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Q3. What is cause of rolling mill bearing broken
Ans. 
The main causes of rolling mill bearing breakage are lack of lubrication, contamination, overloading, and misalignment.
• Lack of lubrication can lead to increased friction and heat generation, causing the bearing to fail prematurely.

• Contamination from dirt, debris, or water can accelerate wear and tear on the bearing surfaces.

• Overloading the bearing beyond its capacity can cause excessive stress and lead to failure.

• Misal...read more
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Q4. Compressor overhead cause
Ans. 
Compressor overhead cause can be due to various factors such as high discharge pressure, low suction pressure, dirty filters, or worn out components.
• High discharge pressure can lead to overheating of the compressor.

• Low suction pressure can cause the compressor to work harder and overheat.

• Dirty filters can restrict airflow and cause the compressor to overheat.

• Worn out components such as valves or seals can lead to ineff
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Q5. How to measure wire rope condition
Ans. 
Wire rope condition can be measured by visual inspection, non-destructive testing, and load testing.
• Visual inspection for signs of wear, corrosion, broken wires, and distortion

• Non-destructive testing methods like magnetic particle inspection, ultrasonic testing, and dye penetrant testing

• Load testing to assess the strength and integrity of the wire rope under working conditions
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Q6. Lubricant chemicals property
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Gear box replacement work

Q1. Barring checking and replacement work and safety first and all ppes sure and paper work and try out and walked away clean and fresh and blumber block top cover open and old slue Barring remove and new slue...read more
Ans. 
Blumber block top cover open and old slue Barring remove and new slue Barring replace and nut tightening sure and blumber block top cover fixed and bolts nut tightening sure and paper work cancelled and conveyer belt running ok
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Q2. Motor replacement work and safety first and all ppes sure and paper work and try out and walked away clean and fresh and bolts nut open and old motor remove and new motor replace and bolts nut tightening s...read more
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Bolt nut open and old motor remove and new motor replace and bolt nut tightening sure and Dayal gauge eliminate process ok and paper work cancelled and conveyer belt running ok
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Q3. V-scraper replacement work and safety first and all ppes sure and paper work and try out and walked away clean and fresh and bolts nut open and old v-scraper remove new v-scraper replace and bolts nut tigh...read more
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Q4. Discharge Chute replacement work and safety first and all ppes sure and paper work and try out and walked away clean and fresh and bolts nut open and old discharge chute remove and new discharge chute repl...read more
Ans. 
Bolt nut open and old discharge chute remove and new discharge chute replace and bolts nut tightening sure and paper work cancelled and conveyer belt running ok
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Q5. Barring Greasing work and safety first and all ppes sure and paper work and all pulley checking and savings greasing sure and paper work cancelled
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Q6. Gear box replacement work and safety first and all ppes sure and paper work and try out and walked away clean and fresh and bolts nut open and old gear box remove and new gear box replace and bolts nut tig...read more
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Q1. What is Hydraulic system and it's components?
Ans. 
A hydraulic system uses fluid to transmit power and consists of components like pumps, cylinders, valves, and hoses.
• Hydraulic pump: generates flow to the hydraulic system

• Hydraulic cylinder: converts fluid power into mechanical power

• Hydraulic valve: controls the flow and pressure of the fluid

• Hydraulic hose: carries the fluid between components
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Q2. Explain steel making process?
Ans. 
Steel making process involves converting iron ore into steel through various stages like smelting, refining, and casting.
• Iron ore is mined and transported to a steel mill.

• The iron ore is smelted in a blast furnace to remove impurities and create molten iron.

• The molten iron is then refined in a basic oxygen furnace or an electric arc furnace to adjust the carbon content and other alloying elements.

• The refined molten iro...read more
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It is very good exam and easy topics

Q1. What is charaterstic strength
Ans. 
Characteristic strength is the maximum stress that a material can withstand before failure.
• Characteristic strength is a measure of the maximum stress a material can handle.

• It is often used in engineering to determine the safety factor of a material.

• For example, the characteristic strength of steel is typically around 400 MPa.
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Q1. Power factor What is vfd Difference between ac and dc motor
Ans. 
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
Ans. 
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. About subject and mechanical related question
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Q2. What is gear,pully,belt drive ,chain etc
Ans. 
Gear, pulley, belt drive, and chain are mechanical components used to transmit motion and power between rotating shafts.
• Gear: Toothed wheel that meshes with another gear to transmit motion.

• Pulley: Wheel with a grooved rim used with a belt to transmit power.

• Belt drive: System of belts and pulleys used to transfer power between shafts.

• Chain: Series of connected links used to transmit motion and power.

• Examples: Gear train...read more
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Q1. What is the heat treatment
Ans. 
Heat treatment is a process used to alter the physical and sometimes chemical properties of a material through controlled heating and cooling.
• Heat treatment involves heating a material to a specific temperature, holding it at that temperature for a certain amount of time, and then cooling it at a controlled rate.

• The purpose of heat treatment is to improve the material's hardness, strength, toughness, ductility, and oth...read more
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Q1. What is the magnetic particle test procedure
Ans. 
Magnetic particle test is a non-destructive testing method used to detect surface and near-surface flaws in ferromagnetic materials.
• The test involves magnetizing the component, applying magnetic particles to the surface, and inspecting for indications of defects.

• Defects such as cracks, laps, seams, and inclusions can be detected using this method.

• The test can be performed using either dry magnetic powder or wet fluores...read more
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