ArcelorMittal Nippon Steel Manager Mechanical Maintenance Interview Questions and Answers

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Q1. Technical questions regarding bearings, m/c maintenance
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Q1. Job Profile of Previous Company
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Q2. Salary Expectation in the company
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Q1. How to know if Hydraulic cylinder leakage
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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. Process of production
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Q2. Final production process
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Q1. Any angle questions apply on my mechanical engineering diploma
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Q2. I'm very interested sub Theoryof machine
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Q3. Automobile interested
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Q4. I like Jindal stainless-steel
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Q1. I'm very very interested for job in Jindal stainless steel
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Q1. What are type of crane used
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Various types of cranes are used in mechanical maintenance, including overhead cranes, gantry cranes, jib cranes, and mobile cranes.
• Overhead cranes are commonly used in industrial settings for lifting and moving heavy loads.

• Gantry cranes are used in shipyards and construction sites for lifting and moving large objects.

• Jib cranes are often used in workshops and warehouses for precise lifting and positioning of materials...read more
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Q2. What are type of loading on bearing
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Types of loading on bearings include radial load, axial load, and moment load.
• Radial load: Load acting perpendicular to the axis of rotation.

• Axial load: Load acting parallel to the axis of rotation.

• Moment load: Load causing bending or twisting of the bearing.

• Combination loading: Bearings may experience a combination of radial, axial, and moment loads.

• Examples: Radial load on a wheel bearing, axial load on a thrust bear
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Q3. What type of heat treatment to be done on tube mill shaft
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The tube mill shaft should undergo heat treatment to improve its strength and durability.
• The most common heat treatment for tube mill shafts is quenching and tempering.

• Quenching involves heating the shaft to a high temperature and then rapidly cooling it in water or oil to increase its hardness.

• Tempering is done after quenching to reduce the brittleness caused by the rapid cooling process.

• Other heat treatment methods l...read more
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Q4. What do you understand by Pickling process
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Pickling process is a metal surface treatment method to remove impurities and improve corrosion resistance.
• Pickling is a chemical process used to remove impurities like stains, rust, and scale from metal surfaces.

• It involves immersing the metal in an acidic solution, such as hydrochloric acid or sulfuric acid.

• The process helps to improve the metal's corrosion resistance and prepare it for further treatments like painti...read more
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Q5. What happen in cold rolling mill process to structure of steel
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In cold rolling mill process, the structure of steel is altered through compression and deformation.
• Cold rolling reduces the thickness of steel by compressing it between rollers

• This process increases the strength and hardness of the steel

• Grain structure of the steel becomes elongated and aligned in the direction of rolling

• Cold rolling can also improve the surface finish and dimensional accuracy of the steel

• Examples: Co...read more
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Q6. How Centrifugal pump work
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Centrifugal pumps work by converting mechanical energy from a motor into kinetic energy to move fluid through the pump.
• Centrifugal force is created by the rotation of the pump impeller, which pushes the fluid towards the outer edges of the pump casing.

• The kinetic energy of the fluid increases as it moves through the pump, creating pressure that forces the fluid out of the pump discharge.

• Centrifugal pumps are commonly u...read more
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Q7. Tube mill roll materail and their root dia
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Tube mill rolls are typically made of high-quality alloy steel or tool steel, with varying root diameters depending on the specific application.
• Tube mill rolls are commonly made of materials such as high-quality alloy steel or tool steel for durability and wear resistance.

• The root diameter of tube mill rolls can vary depending on the specific requirements of the milling process.

• Examples of tube mill roll materials incl...read more
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Q8. Gear box ratio and output power
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Gear box ratio determines the relationship between input and output speeds, while output power is the amount of work done per unit of time.
• Gear box ratio is the ratio of the number of teeth on the input gear to the number of teeth on the output gear.

• Output power is the product of the force applied and the distance over which the force is applied per unit of time.

• For example, if a gear box has a ratio of 2:1 and the inp...read more
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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
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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?
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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?
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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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