Buhler Senior Service Engineer Interview Questions and Answers for Experienced

Q1. Ask about career of education and previous work in previous company...
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Q2. Be confident & Be smart answer to the interview conducted person..
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Q1. Good in communication... Be in confidence what your telling at the time of interview... Be prepare well on resume what you have forwarded.... Be smart answer at the time of interview.....
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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
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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. Previous experience and project related technical questions.
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Q2. Basic Electrical engineering questions from previous experience
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What is the meaning of NPSH?

Q1. Communication between PLC controllers and DCS
Ans. 
Communication between PLC controllers and DCS involves establishing a reliable connection for data exchange.
• PLC controllers and DCS communicate through various communication protocols such as Modbus, Profibus, Ethernet/IP, etc.

• Data is exchanged between PLC controllers and DCS for process control and monitoring.

• Communication can be bidirectional, allowing both systems to send and receive data.

• Proper configuration and pr...read more
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Q2. PID tunning and control
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Q1. Why do you wanna join ABB
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Q2. What make you chose abb over other companies
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