20+ Godawari Power & Ispat Interview Questions and Answers

Double earthing is a safety measure where two separate earth connections are provided for a system or equipment.

• System earthing is the connection of the neutral point of a power system to the earth to provide a low impedance path for fault current.

• Equipment earthing is the connection of non-current carrying parts of electrical equipment to the earth to prevent electric shock.

• Double earthing provides an additional layer of safety by providing two separate earth connections for...read more

I have worked with both types of cranes - contactor logic and drive operated. The challenging failures varied.

• I have worked with contactor logic cranes in a steel plant where the main challenge was the wear and tear of the contactors due to the high current and frequent switching.

• In a drive operated crane, the main challenge was the programming and tuning of the variable frequency drives to ensure smooth and precise movements.

• I have also encountered failures in the control ci...read more

To modify drive parameters, access the drive's programming interface and adjust the desired settings.

• Identify the type of drive being used (e.g. AC drive, DC drive, servo drive)

• Access the drive's programming interface (e.g. keypad, software)

• Adjust the desired parameters (e.g. speed, torque, acceleration)

• Save the changes and test the drive's performance

• Examples of drive manufacturers with programming interfaces include Siemens, ABB, and Schneider Electric

Various types of equipment are available for furnace dust catching.

• Cyclone separators

• Electrostatic precipitators

• Bag filters

• Wet scrubbers

• Venturi scrubbers

Surge arrester protects transformer from voltage surges. EAF uses furnace transformers. Max demand is the highest power demand in a given period.

• Surge arrester diverts high voltage surges to ground, protecting transformer insulation.

• EAF (Electric Arc Furnace) uses furnace transformers to supply power to the furnace.

• Max demand is the highest power demand in a given period, usually measured in kilowatts (kW) or megawatts (MW).

Mould oscillator and electromagnetic stirrer are used in caster to improve the quality of casted steel.

• Mould oscillator is a device that vibrates the mould during casting to prevent solidification defects and improve the surface quality of the steel.

• Electromagnetic stirrer is used to create a rotating magnetic field in the molten steel to improve the homogeneity of the steel and reduce inclusions.

• Both devices are used in continuous casting process to improve the quality of th...read more

Thermocouple is a temperature sensor that works on the principle of Seebeck effect.

• It consists of two dissimilar metals joined together at one end.

• When there is a temperature difference between the two ends, it generates a voltage.

• This voltage is proportional to the temperature difference and can be measured to determine the temperature.

• Thermocouples are commonly used in industrial applications such as furnaces, boilers, and ovens.

• They are also used in automotive and aerospac...read more

Circuit diagrams for RDOL, Delta Connection in Motors & Star Delta Starter.

• RDOL circuit diagram includes a DOL starter with a relay for overload protection.

• Delta connection in motors is a three-phase connection where the ends of each phase are connected to form a closed loop.

• Star delta starter is used to reduce the starting current of a motor by initially connecting the motor in star configuration and then switching to delta configuration.

• Star delta starter circuit diagram in...read more

Yes, I am highly proficient in both Ms Excel and PowerPoint.

• I have extensive experience in creating and editing spreadsheets in Excel, including using formulas and macros.

• I am skilled in creating visually appealing and effective presentations in PowerPoint, including using animations and multimedia.

• I am also familiar with integrating Excel data into PowerPoint presentations.

• I am always eager to learn new features and techniques in both programs to improve my productivity and ...read more

Zero speed switch is used to detect the absence or presence of motion in rotating equipment.

• It is used to monitor the speed of rotating equipment and detect any stoppage or slowdown.

• It can be used as a safety device to prevent damage to equipment or injury to personnel.

• It can also be used to control the start/stop of equipment based on the speed.

• Examples include conveyor belts, pumps, and fans.

• It works by sensing the rotation of a shaft and sending a signal to a control syste...read more

Load distribution scheme during shutdown management involves proper planning and allocation of resources to ensure safety and efficiency.

• Identify critical equipment and prioritize their shutdown sequence

• Ensure proper isolation and tagging of equipment to prevent accidental energization

• Allocate resources such as manpower, tools, and equipment based on the shutdown plan

• Monitor and control the load distribution during shutdown to prevent overloading of systems

• Develop contingency...read more

I have handled various types of PLCs including Siemens, Allen Bradley, and Mitsubishi.

• Siemens PLCs - S7-200, S7-300, S7-400, and S7-1200 series

• Allen Bradley PLCs - MicroLogix, CompactLogix, and ControlLogix series

• Mitsubishi PLCs - FX series and Q series

• Experience in programming, troubleshooting, and maintenance of PLCs

• Familiarity with ladder logic, function block diagrams, and structured text programming languages

PLC breakdown due to power surge, resolved by replacing damaged components.

• Power surge caused damage to PLC components

• Identified damaged components through diagnostic tests

• Replaced damaged components to restore functionality

A Reactive Power Compensator is a device used to improve power factor and voltage stability in electrical systems.

• It is also known as a Static Var Compensator (SVC)

• It is used to regulate reactive power in electrical systems

• It can improve voltage stability and reduce power losses

• It consists of capacitors and inductors that can be switched on and off as needed

• Examples include Thyristor Controlled Reactor (TCR) and Thyristor Switched Capacitor (TSC) systems

Starters are used to control the starting and stopping of motors. There are various types of starters with different circuit diagrams.

• Direct On-Line (DOL) Starter

• Star-Delta Starter

• Auto Transformer Starter

• Soft Starter

• Circuit diagrams vary depending on the type of starter used

• DOL starter circuit diagram includes a contactor and overload relay

• Star-Delta starter circuit diagram includes a timer and contactor

• Auto Transformer starter circuit diagram includes an auto transformer and...read more

Vacuum degassing is a process of removing dissolved gases from a liquid or a solid material by subjecting it to a low-pressure environment.

• It is commonly used in metallurgy to remove impurities from molten metals.

• It is also used in the production of electronic components to remove air bubbles from the resin.

• Vacuum degassing is important in the food industry to remove air from packaging to increase shelf life.

• It is also used in the production of certain types of plastics to re...read more

Transformer maintenance involves regular inspection, testing, and cleaning to ensure optimal performance and prevent breakdowns.

• Inspect transformer for signs of damage or wear

• Test transformer oil for impurities and breakdown voltage

• Clean transformer components and replace worn parts

• Check and tighten electrical connections

• Monitor transformer temperature and load capacity

• Follow manufacturer's recommended maintenance schedule

• Keep detailed records of maintenance and repairs

Safety interlocks in boiler and turbine are mechanisms designed to prevent unsafe conditions and protect equipment.

• Safety valves to release excess pressure in the boiler

• Flame detectors to ensure proper combustion in the boiler

• Emergency stop buttons to shut down the turbine in case of a malfunction

• Temperature sensors to monitor and control the temperature in the boiler and turbine

• Pressure switches to prevent overpressure situations

The number of overspeed trips set in turbines varies depending on the type and size of the turbine.

• The number of overspeed trips set in turbines can range from 1 to 3, depending on the manufacturer and design of the turbine.

• Overspeed trips are safety mechanisms that are designed to shut down the turbine if it exceeds its maximum safe operating speed.

• Some turbines may have adjustable overspeed trip settings to allow for customization based on specific operating conditions.

• It i...read more

ACC vacuum may be low during rain due to water entering the system and affecting the vacuum pressure.

• Water entering the ACC system can disrupt the vacuum pressure

• Moisture can cause blockages in the system, leading to low vacuum levels

• Leaks in the system can allow water to enter and affect the vacuum pressure

AutoCAD is a computer-aided design software used for creating 2D and 3D designs.

• AutoCAD is a software developed by Autodesk.

• It is widely used in various industries like architecture, engineering, and construction.

• It allows users to create precise and detailed drawings using a variety of tools and commands.

• AutoCAD supports both 2D and 3D modeling.

• Users can create objects, apply dimensions, add annotations, and perform simulations.

• It offers features like layers, blocks, and tem...read more

A type of file refers to the format or structure in which data is stored or organized.

• The type of file can be determined by its file extension, such as .txt for text files, .jpg for image files, .pdf for PDF files, etc.

• Common types of files include text files, image files, audio files, video files, executable files, etc.

• Different types of files may require different software applications to open and view them.

• Files can also be categorized based on their purpose, such as data ...read more

A lathe machine is a tool that rotates a workpiece on its axis to perform various operations such as cutting, sanding, drilling, or deformation.

• A lathe machine is used in metalworking, woodworking, and glassworking industries.

• It can be used to create symmetrical objects like bowls, candlesticks, or shafts.

• The workpiece is held in place and rotated while a cutting tool is moved along the workpiece to remove material.

• There are different types of lathe machines such as engine la...read more

A punch and die are tools used in manufacturing to cut or form sheet metal or other materials.

• Punch is the tool that applies force to the material, while the die is the tool that the material is shaped against.

• Punch and die sets are commonly used in processes like stamping, blanking, and bending.

• The punch and die must be carefully designed to ensure accurate and consistent results.

• Examples of punch and die applications include creating holes in metal sheets, forming complex s...read more

Person profile data refers to information about an individual's personal and professional background.

• Includes name, contact information, education, work experience, and skills.

• May also include personal interests, hobbies, and social media profiles.

• Used by employers to evaluate job candidates and by marketers to target specific demographics.

• Examples: LinkedIn profiles, resumes, job applications.

To maintain an air compressor, regular maintenance and inspections are necessary.

• Check and change the oil regularly

• Inspect and clean the air filters

• Drain moisture from the tank

• Inspect and tighten all connections

• Keep the compressor in a clean and well-ventilated area

• Follow manufacturer's guidelines for maintenance