Usha Martin
10+ Metriqe Solutions Interview Questions and Answers
Q1. What is the Concept of Double Earthing, System Earthing & Equipment Earthing?
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
Q2. Which type of Crane (Contactor Logic/ Drive Operated) you was Worked & What was Challenging Failures?
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
Q3. Which type of Drive worked and How to Modify Parameters Settings.
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
Q4. For Furnace Dust Catching, which type of Equipment was Available?
Various types of equipment are available for furnace dust catching.
Cyclone separators
Electrostatic precipitators
Bag filters
Wet scrubbers
Venturi scrubbers
Q5. What is the Function of Surge Arrester in Transformer? Which type of Transformer used in EAF? What is Max. Demand?
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).
Q6. What is Mould Oscillator & Electro magnetic Stirrer in Caster?
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
Q7. What is the Concept of Thermocouple for Temperature Sensing?
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
Q8. Write Circuit Diagram for RDOL, Delta Connection in Motors & Star Delta Starter.
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
Q9. Are you Compatible in Ms Excel & PowerPoint?
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
Q10. What is the Function of Zero Speed Switch?
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
Q11. Load Distribution Scheme during Shutdown Management.
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
Q12. Which type of PLC you Handled?
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
Q13. Past PLC Breakdown Faced & it's Troubleshooting.
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
Q14. What is Reactive Power Compensator?
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
Q15. Types & Circuit Diagram of Starters Worked.
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
Q16. What is Vaccum Degassing?
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
Q17. Transformer Maintenance Procedure.
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
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