Jindal Stainless Executive Engineer Interview Questions, Process, and Tips

Submerged entry nozzles (SEN) are commonly used for slab cooling in continuous casting process.

• Submerged entry nozzles (SEN) are designed to deliver cooling water directly to the slab surface.

• SEN helps in controlling the solidification process and improving the quality of the slab.

• Examples of SEN manufacturers include Vesuvius, TATA Steel, and SMS group.

Internal casting defect in continuous casting refers to flaws or imperfections that occur within the casting material during the casting process.

• Internal shrinkage: caused by improper cooling or solidification of the casting material, leading to voids or cavities within the material.

• Inclusions: foreign particles or impurities that become trapped within the casting material, affecting its structural integrity.

• Segregatio...read more

External defects in continuous casting process include surface cracks, surface blowholes, and surface segregation.

• Surface cracks can occur due to improper cooling or excessive casting speed.

• Surface blowholes are caused by trapped gases in the molten metal.

• Surface segregation results from uneven distribution of alloying elements.

• Other external defects may include surface scabs and surface laps.

JSL Jajpur uses various types of casting machines including continuous casting machines and vertical casting machines.

• JSL Jajpur uses continuous casting machines for producing long, continuous shapes like rods, tubes, and beams.

• They also use vertical casting machines for producing solid shapes like ingots and slabs.

• Other types of casting machines used at JSL Jajpur may include horizontal casting machines and centrifuga

Miniscus level in continuous casting refers to the level of molten metal in the mold during the casting process.

• Miniscus level should be maintained at a specific height to ensure proper solidification of the metal.

• Maintaining the miniscus level helps control the flow of metal and prevent defects in the final product.

• If the miniscus level is too high, it can lead to overflow and if it is too low, it can cause issues wit...read more

Chromium is added to stainless steel to increase its corrosion resistance and strength.

• Chromium forms a passive oxide layer on the surface of stainless steel, which prevents rusting and corrosion.

• Chromium also improves the hardenability of stainless steel, making it stronger and more durable.

• The amount of chromium added to stainless steel can vary, with higher percentages leading to better corrosion resistance.

• For exam...read more

Nickel is added to stainless steel to improve its corrosion resistance, strength, and durability.

• Nickel increases the resistance of stainless steel to corrosion and oxidation

• Nickel improves the strength and toughness of stainless steel

• Nickel helps maintain the austenitic structure of stainless steel at high temperatures

• Nickel is often used in combination with other elements like chromium and molybdenum to enhance the p

Pipe layout refers to the arrangement and positioning of pipes in a system to ensure efficient flow of fluids or gases.

• Pipe layout involves determining the route, size, and elevation of pipes within a system.

• Consideration must be given to factors such as pressure drop, flow rate, and accessibility for maintenance.

• Proper pipe layout can optimize system performance and minimize potential issues such as leaks or blockages

Position displacement pumps are used for hydraulic systems due to their ability to provide precise control over fluid flow and pressure.

• Position displacement pumps offer accurate and repeatable flow rates, making them ideal for applications requiring precise control.

• These pumps are capable of maintaining constant pressure, which is crucial in hydraulic systems to ensure consistent performance.

• Position displacement pump...read more

Pipe schedule refers to the wall thickness of pipes used in various industries.

• Pipe schedule is a way to standardize the thickness of pipes for different applications.

• It is denoted by a number followed by 'S' (e.g. Schedule 40, Schedule 80).

• Higher schedule numbers indicate thicker walls for higher pressure applications.

• Pipe schedules are important for ensuring compatibility and safety in piping systems.

The procedure for replacing a pump in a hydraulic system involves draining the system, disconnecting the old pump, installing the new pump, and refilling the system.

• Drain the hydraulic system to prevent spills and contamination.

• Disconnect the old pump from the system by removing any connecting hoses or pipes.

• Install the new pump in the same location as the old pump, ensuring proper alignment and connection.

• Refill the h...read more

System pressure in a hydraulic system is set using a pressure relief valve or a pressure regulator.

• System pressure can be set using a pressure relief valve which opens to release excess pressure.

• A pressure regulator can also be used to control the pressure by adjusting the setting.

• The pressure setting is typically determined based on the requirements of the hydraulic system and the components used.

• Monitoring devices su...read more

TIG welding is a welding process that uses a non-consumable tungsten electrode to produce the weld. It is widely used in jointing hydraulic pipes due to its precision and clean welds.

• TIG welding stands for Tungsten Inert Gas welding.

• It uses a non-consumable tungsten electrode to create the weld.

• TIG welding produces high-quality, clean welds with minimal spatter.

• The process allows for precise control over the welding ar...read more

Cleaning pipe lines involves various procedures such as flushing, pigging, and chemical cleaning.

• Flushing involves using water or air pressure to remove debris and buildup from the pipes.

• Pigging uses a device called a 'pig' to scrape the inside of the pipe and push out any blockages.

• Chemical cleaning involves using specific chemicals to dissolve and remove stubborn deposits in the pipes.

• Regular maintenance and inspecti...read more

NAS value is a measure of network-attached storage performance and reliability, important to achieve within standard limits for optimal data storage and access.

• NAS value stands for Network-Attached Storage value, which measures the performance and reliability of a storage system.

• It is important to achieve NAS value within standard limits to ensure optimal data storage and access speeds.

• Exceeding NAS value limits can re...read more

Conveyor alignment is done by adjusting the idlers and pulleys to ensure the belt runs straight and centered on the conveyor frame.

• Check for any misalignment by observing the belt's position on the idlers.

• Adjust the idlers and pulleys to ensure the belt runs straight and centered.

• Use alignment tools such as laser alignment devices for precision.

• Regularly inspect and maintain the conveyor system to prevent misalignment ...read more

Factors and requirements for procuring a conveyor belt

• Consider the type of material being transported

• Determine the required capacity and speed of the conveyor belt

• Evaluate the environment where the conveyor belt will be used (e.g. temperature, humidity)

• Assess the maintenance and operating costs of the conveyor belt

• Check the safety features and regulations compliance of the conveyor belt

• Look into the reputation and reli...read more

Couplings are used to connect two shafts together while allowing for some degree of misalignment. Alignment is crucial for proper functioning.

• Types of couplings include rigid, flexible, fluid, and magnetic couplings.

• Procedure for alignment involves checking shaft alignment using tools like dial indicators, laser alignment systems, or straightedges.

• Alignment process includes adjusting shims, moving machinery, and rechec...read more

A rapid wagon loading system is a technology used to quickly load goods onto train wagons for transportation.

• Utilizes automated machinery to load goods efficiently

• Reduces loading time significantly compared to manual loading

• Commonly used in industries such as mining, agriculture, and logistics

• Examples include conveyor belt systems, robotic arms for loading, and automated palletizing systems