Bonace Engineers Electrical Engineer Interview Questions and Answers

Q1. About previous experience?
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Q2. What types of relay's are used in Indian railway signalling system?
Ans. 
Various types of relays are used in the Indian railway signalling system.
• Electromagnetic relays are commonly used in the Indian railway signalling system.

• Track circuit relays are used to detect the presence of trains on the tracks.

• Route relays are used to control the movement of trains on different routes.

• Interlocking relays ensure the safe operation of railway signals and points.

• Time delay relays are used for controll...read more
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Q3. How to detect a module either it's earth leakage problem or not?
Ans. 
To detect earth leakage problem in a module, measure the current flowing through the earth wire.
• Measure the current flowing through the earth wire using a clamp meter.

• If the current is above the specified limit, then there is an earth leakage problem.

• Check the wiring and connections for any faults or damages.

• Perform insulation resistance test to confirm the issue.

• If the problem persists, consult with a qualified electr
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Q4. How to handle Dc powerd modules?
Ans. 
DC powered modules should be handled with caution and proper safety measures.
• Always turn off the power supply before handling the modules.

• Use appropriate tools and equipment to avoid electrostatic discharge.

• Follow the manufacturer's instructions for installation and maintenance.

• Regularly check for any signs of damage or wear and tear.

• Ensure proper grounding and insulation to prevent electrical hazards.

• Keep the modules ...read more
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Q5. What do you know about railway electronic interlocking system?
Ans. 
Railway electronic interlocking system is a safety system that prevents conflicting movements of trains.
• It uses electronic signals to control the movement of trains and ensure safety.

• It prevents two trains from entering the same track section at the same time.

• It also ensures that a train can only enter a track section if the previous section is clear.

• It can be programmed to allow for different types of train movements,...read more
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Q1. Tell me more about your last task that you worked on.
Ans. 
Developed a web application for managing customer orders and inventory.
• Used JavaScript, HTML, and CSS to build the front-end interface.

• Implemented a RESTful API using Node.js and Express.js for the back-end functionality.

• Utilized a PostgreSQL database to store and retrieve data.

• Implemented authentication and authorization features for secure access.

• Performed unit testing and debugging to ensure the application's functi...read more
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Q2. Design a System from High level and low level
Ans. 
Designing a system involves creating a high-level architecture and breaking it down into low-level components.
• Start by identifying the problem the system needs to solve

• Create a high-level architecture that outlines the major components and their interactions

• Break down each component into smaller, more manageable pieces

• Design each low-level component with a specific function in mind

• Ensure that all components work togeth...read more
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Q3. Some direct Questions from SQL
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Q1. Moving average in pandas
Ans. 
Moving average in pandas is a statistical calculation that smooths out fluctuations in data by averaging values over a specified time period.
• Use the 'rolling' function in pandas to calculate moving averages

• Specify the window size for the moving average calculation

• Example: df['moving_avg'] = df['column'].rolling(window=3).mean()
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Q2. About Imputations
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Write a program how to sort

Q1. Questions regarding your tech
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Q1. Tell me about yourself.
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