ABB Project Engineer Interview Questions and Answers

Q1. Previous experience and project related technical questions.
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Q2. Basic Electrical engineering questions from previous experience
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Q1. What is Profibus?
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Q2. How to troubleshoot Profibus
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Troubleshooting Profibus involves checking physical connections, network configuration, and device settings.
• Check physical connections to ensure cables are properly connected and not damaged.

• Verify network configuration settings such as baud rate, parity, and address assignments.

• Inspect device settings to ensure they match the network configuration and are functioning correctly.

• Use diagnostic tools like Profibus analyz...read more
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Q1. Hazardous classification
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Q2. Environment conditions for Panel installation
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Environment conditions such as temperature, humidity, and cleanliness are crucial for panel installation.
• Temperature should be within specified range to prevent damage to components.

• Humidity levels should be controlled to avoid condensation and corrosion.

• Cleanliness is important to prevent dust and debris from affecting performance.

• Proper ventilation is necessary to prevent overheating.

• Avoid exposure to direct sunlight...read more
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Q3. Restricted Earth Fault -explain
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Restricted Earth Fault is a type of fault in electrical systems where the fault current is limited to a specific section of the system.
• Occurs when a fault current flows from a phase conductor to the earth through a restricted path

• Usually detected by a relay that monitors the current imbalance between the phase and neutral conductors

• Helps in quickly identifying and isolating the fault to prevent damage to equipment and ...read more
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Q4. Differential earth fault -explain
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Differential earth fault is a type of fault in electrical systems where the current flowing into and out of the system is not equal due to an earth fault.
• Differential earth fault protection is used to detect such faults by comparing the current entering and leaving the system.

• It is important for safety as it helps prevent damage to equipment and potential electric shocks.

• Examples of differential earth fault protection ...read more
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Q5. Transformer insulation class
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Transformer insulation class indicates the temperature at which the insulation can operate safely.
• Transformer insulation class is denoted by a letter (e.g. A, B, F, H) which corresponds to a maximum allowable temperature rise above ambient.

• Higher insulation classes can withstand higher temperatures, providing better protection for the transformer.

• Common insulation classes include A (105°C), B (130°C), F (155°C), and H ...read more
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Q6. Scheme to detect transformer temperature
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Implement a scheme using temperature sensors to detect transformer temperature.
• Install temperature sensors at key points on the transformer

• Set up a monitoring system to continuously track temperature readings

• Establish temperature thresholds for alerts and shutdowns

• Implement a cooling system to regulate temperature if needed
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Q7. Intelligence control system
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Q8. Standby earth fault
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Q9. Earthed system and unearthed system
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Q10. Voltage Levels- As per standards
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Voltage levels as per standards vary depending on the application and region, with common levels including 110V, 220V, and 415V.
• Voltage levels can vary depending on the application and region

• Common residential voltage levels include 110V and 220V

• Industrial voltage levels are typically higher, such as 415V

• International standards like IEC and ANSI provide guidelines for voltage levels
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Q11. Types of MCCB to explain
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Molded Case Circuit Breakers (MCCBs) are types of circuit breakers that provide protection against overcurrents.
• Thermal-magnetic MCCB: Trips when a current overload or short circuit is detected.

• Electronic MCCB: Uses electronic components for more precise and adjustable protection.

• Compact MCCB: Smaller in size for limited space installations.

• Adjustable MCCB: Allows for manual adjustment of trip settings.

• Motor protection...read more
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Q12. Lighting Calculation- Manually
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Q13. Factors to consider for Lighting Calculation
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Factors to consider for lighting calculation include type of space, desired lighting levels, fixture efficiency, and lighting layout.
• Type of space (office, warehouse, retail, etc.)

• Desired lighting levels (measured in lux or foot-candles)

• Fixture efficiency (lumens per watt)

• Lighting layout (spacing and placement of fixtures)

• Natural lighting sources (windows, skylights)

• Color rendering index (CRI) for accurate color repres...read more
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Q1. What is the control valve and operation
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A control valve is a device used to regulate the flow of a fluid in a system by varying the size of the flow passage.
• Control valves are commonly used in industries such as oil and gas, chemical, and power plants.

• They can be operated manually, pneumatically, electrically, or through a combination of these methods.

• The operation of a control valve involves adjusting the position of the valve plug or disc to control the fl...read more
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Q1. Salary expectations
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Q1. Introduce yourself briefly?
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Q2. What projects you have done in previous company
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Q3. What is lifecycle of project
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Q4. What are the industrial communication protocols
Ans. 
Industrial communication protocols are standards for data exchange between devices in industrial automation and control systems.
• Some common industrial communication protocols include Modbus, Profibus, DeviceNet, Ethernet/IP, and CANopen.

• These protocols enable devices from different manufacturers to communicate with each other and exchange data.

• Industrial communication protocols can be wired or wireless, and can operate...read more
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Q5. What are the settings required in MODBUS
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MODBUS settings include baud rate, parity, data bits, stop bits, and slave address.
• Baud rate determines the speed of communication between devices.

• Parity is used for error checking and can be set to even, odd, or none.

• Data bits determine the number of bits used to represent each character.

• Stop bits indicate the end of a character and can be set to 1 or 2.

• Slave address is used to identify the device on the network.

• Examp...read more
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Q6. Maximum speed in modbus
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The maximum speed in Modbus depends on the baud rate and cable length.
• Modbus speed is measured in baud rate

• Higher baud rates allow for faster data transfer

• Cable length can also affect the maximum speed

• For example, at 9600 baud rate, the maximum cable length is 1200 meters
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Q7. How many device add in modbus
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The number of devices that can be added in Modbus depends on the network architecture and the number of available addresses.
• The maximum number of devices that can be added to a Modbus network is 247.

• The number of available addresses depends on the type of Modbus protocol used (RTU or TCP/IP).

• The network architecture also plays a role in determining the number of devices that can be added.

• It is important to ensure that ...read more
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Q8. Types of modbus communication
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Modbus communication types include RTU, ASCII, and TCP/IP.
• RTU (Remote Terminal Unit) is a serial communication protocol that uses binary code to transmit data.

• ASCII (American Standard Code for Information Interchange) is a serial communication protocol that uses ASCII characters to transmit data.

• TCP/IP (Transmission Control Protocol/Internet Protocol) is a network communication protocol that uses Ethernet to transmit d...read more
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Q9. On which scada you are worked
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Q10. What is maximum Input output handle
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The maximum input output handle refers to the maximum number of inputs and outputs that a device can handle.
• The maximum input output handle varies depending on the device and its specifications.

• It is important to consider the maximum input output handle when selecting a device for a project.

• For example, a PLC may have a maximum input output handle of 256 inputs and 256 outputs.

• Another example is a microcontroller with ...read more
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Q11. How many pages designed in HMI
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The number of pages designed in HMI depends on the project requirements and complexity.
• The number of pages can range from a few to hundreds depending on the project scope.

• The complexity of the HMI design and functionality also affects the number of pages.

• Factors such as user interface, data visualization, and system integration can impact the number of pages.

• It is important to prioritize user experience and ease of nav...read more
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What is relay..who it's work what is conductor tell about plc,scada,hmi

Q1. What is ur first project tell about it ..plc motor logic with 5 sec delay
Ans. 
My first project involved designing a PLC motor control system with a 5-second delay for operational efficiency.
• Utilized a PLC (Programmable Logic Controller) to automate motor operations.

• Implemented a 5-second delay to prevent motor overload during start-up.

• Designed the logic using ladder diagrams for clear visualization.

• Tested the system to ensure the delay function worked as intended.

• Integrated safety features to pr...read more
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Q1. Where are form,when u start a carrer, i like to join in this comany
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