Siemens Energy Instrument Commissioning Engineer Interview Questions and Answers

Q1. Maintenance phylosophy
Ans. Depends on equipment running hour, criticality, availability and standby.
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Q1. GD&T QUESTION? Technical question?
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Q2. GD&T- Geometric dimensioning & Tolerancing
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Discuss work related questions

Q1. Salary discuss and other accommodation
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Q1. Tell me about yourself.
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Q2. Notice period of my present organisation
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Q1. Site based question about TG Deck Slab, Ash Handling Package
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Q1. About my academic
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Q2. About salary & family background
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Q1. About college project
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Q2. Some discussion on college studies
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Q1. Can you provide an introduction about yourself?
Ans. 
Experienced Senior Engineer with a strong background in software development and project management.
• Over 10 years of experience in designing and implementing complex software solutions

• Proficient in multiple programming languages such as Java, Python, and C++

• Led cross-functional teams to successfully deliver projects on time and within budget

• Strong problem-solving skills and ability to adapt to new technologies quickly
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Q2. Can you provide details about your work experience?
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I have over 10 years of experience in designing and implementing complex engineering solutions.
• Designed and implemented various engineering solutions for different projects

• Led a team of engineers to successfully complete a major project ahead of schedule

• Collaborated with cross-functional teams to ensure project success

• Utilized advanced engineering tools and techniques to optimize project outcomes
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Q3. What do you know about Doubly Fed Induction Generators?
Ans. 
Doubly Fed Induction Generators (DFIGs) are commonly used in wind turbines to allow variable speed operation and improve efficiency.
• DFIGs have two sets of windings - one on the stator and one on the rotor

• The rotor windings are fed with variable frequency AC power through slip rings and brushes

• DFIGs allow for control of both active and reactive power output

• They are more efficient than fixed speed induction generators

• DFI...read more
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Q4. What is the importance of circuit diagrams in electrical engineering?
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Circuit diagrams are essential in electrical engineering for visualizing and understanding complex circuits.
• Circuit diagrams provide a visual representation of the connections and components in a circuit.

• They help engineers analyze and troubleshoot circuits more efficiently.

• Circuit diagrams aid in the design and construction of electrical systems.

• They are crucial for documenting and communicating circuit designs to oth...read more
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Q5. What is the procedure for reading a wiring diagram?
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Reading a wiring diagram involves understanding symbols, following the flow of current, and identifying components.
• Start by familiarizing yourself with the symbols used in the diagram.

• Follow the flow of current from the power source to the components.

• Identify the different components and their connections based on the diagram.

• Pay attention to the color codes and labels for wires and components.

• Refer to the legend or ke...read more
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Q6. What is an IGBT, how does it work, and what is the importance of diode capacitors in its functionality?
Ans. 
IGBT stands for Insulated Gate Bipolar Transistor, a semiconductor device used for switching applications in power electronics.
• IGBT is a type of power semiconductor device that combines the high efficiency of a MOSFET with the high current and low saturation voltage capability of a bipolar transistor.

• It consists of three terminals: gate, collector, and emitter.

• IGBT works by controlling the flow of current between the c...read more
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Q7. Can you provide training to your team?
Ans. 
Yes, I have experience providing training to my team.
• I have conducted training sessions on new technologies and tools for my team.

• I have created training materials such as presentations, manuals, and hands-on exercises.

• I have mentored junior team members to help them improve their skills.

• I have received positive feedback from team members on the effectiveness of my training sessions.
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Q8. What are your computer skills?
Ans. 
Proficient in various programming languages and software tools, with experience in database management and system administration.
• Proficient in programming languages such as Java, Python, and C++

• Experience with database management systems like MySQL and MongoDB

• Skilled in system administration tasks including network configuration and troubleshooting

• Familiar with software tools such as Git, Jenkins, and Docker
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Q9. How frequently are you able to climb towers as part of your job requirements?
Ans. 
I climb towers as part of my job requirements on a regular basis.
• I climb towers for routine maintenance checks

• I climb towers to install or repair equipment

• I climb towers to conduct inspections or surveys

• On average, I climb towers at least once a month
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Q10. What is your understanding of the balance of plant (BOP)?
Ans. 
BOP refers to the systems and equipment outside of the main power generating unit in a power plant.
• BOP includes components like transformers, switchgear, cooling systems, and fuel systems.

• It is essential for the overall functioning of the power plant.

• BOP is responsible for supporting the main power generation unit and ensuring its efficient operation.

• Examples of BOP components are water treatment systems, piping, and c
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Q11. What are SCADA (Supervisory Control and Data Acquisition) systems and PLC (Programmable Logic Controllers)?
Ans. 
SCADA systems are used to monitor and control industrial processes, while PLCs are programmable devices used to automate machinery and processes.
• SCADA systems gather and analyze real-time data from sensors and equipment in industrial settings.

• SCADA systems allow operators to remotely monitor and control processes, alarms, and events.

• PLCs are programmable devices used to automate machinery and processes based on input f...read more
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Q12. Can you create a controlling circuit diagram based on my specifications?
Ans. 
Yes, I can create a controlling circuit diagram based on your specifications.
• I will need detailed specifications including input/output requirements, components to be used, and any specific constraints.

• I will create a schematic diagram using software like Eagle, Altium, or KiCad.

• I will ensure the circuit meets safety standards and is optimized for performance.

• I will provide documentation including a bill of materials a
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Q13. What is the difference between synchronous and asynchronous generators?
Ans. 
Synchronous generators produce electricity at a constant frequency, while asynchronous generators do not require synchronization with the grid frequency.
• Synchronous generators are connected to the grid and produce electricity at a fixed frequency, typically 50 or 60 Hz.

• Asynchronous generators do not need to be synchronized with the grid frequency and can operate at variable speeds.

• Synchronous generators are commonly us...read more
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Q14. What is the Standard Operating Procedure (SOP)?
Ans. 
SOP is a set of step-by-step instructions compiled by an organization to help workers carry out routine operations.
• SOP is a detailed document that outlines the procedures and processes to be followed in specific situations.

• It ensures consistency and quality in the performance of tasks.

• SOPs are used in various industries such as healthcare, manufacturing, and IT.

• Examples include a SOP for handling customer complaints in...read more
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Q15. Are you familiar with DGR, MGR, or YGR?
Ans. 
DGR, MGR, and YGR are commonly used acronyms in the engineering field.
• DGR stands for Design Gross Rating, which is the maximum allowable weight for a designed structure.

• MGR stands for Maximum Gross Rating, which is the maximum weight a vehicle can carry including its own weight.

• YGR could refer to Yield Gross Rating, but context is needed to determine its specific meaning.
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Q16. Are you knowledgeable about Mean Time Between Failures (MTBF) and Mean Time To Repair (MTTR)?
Ans. 
Yes, I am knowledgeable about MTBF and MTTR in the context of engineering.
• MTBF refers to the average time between failures of a system or component.

• MTTR is the average time it takes to repair a failed system or component.

• Both metrics are important in assessing the reliability and maintenance needs of engineering systems.

• For example, a server may have an MTBF of 10,000 hours and an MTTR of 2 hours.
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Q17. What is more important for system reliability, Mean Time Between Failures (MTBF) or Mean Time to Repair (MTTR)?
Ans. 
MTTR is more important for system reliability as it directly impacts downtime and overall system availability.
• MTTR directly impacts downtime and system availability

• MTBF is important for predicting failures but does not address how quickly the system can be restored

• Focusing on reducing MTTR can lead to improved system reliability and performance
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Q18. What is the function of a Doubly-Fed Induction Generator (DFIG) when used with an asynchronous generator?
Ans. 
DFIG controls the active and reactive power independently, improving efficiency and stability in wind turbines.
• DFIG allows for variable speed operation, improving efficiency in wind turbines.

• It controls the active and reactive power independently, enhancing stability.

• DFIG can provide grid support by injecting or absorbing reactive power as needed.

• It is commonly used in wind turbines to improve power quality and grid in...read more
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Q19. What is slip in a generator?
Ans. 
Slip in a generator refers to the difference between synchronous speed and actual rotor speed.
• Slip is necessary for the generation of electrical power in a generator.

• It is calculated as (Synchronous speed - Actual speed) / Synchronous speed.

• Slip is typically expressed as a percentage.

• Higher slip values indicate lower efficiency in the generator.

• For example, in an induction generator, slip is essential for inducing curr
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Q20. What can you explain about sub-synchronous, synchronous, and super-synchronous speeds?
Ans. 
Sub-synchronous, synchronous, and super-synchronous speeds refer to different speeds at which a rotating machine can operate in relation to the system frequency.
• Sub-synchronous speed: When the machine speed is less than the synchronous speed, typically caused by a mechanical fault or system resonance.

• Synchronous speed: When the machine speed matches the system frequency, commonly seen in normal operating conditions.

• Sup...read more
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Q21. Importance of hub system, Nacelle system in wind turbine ?
Ans. 
Hub system and Nacelle system are crucial components in a wind turbine for efficient energy generation.
• The hub system connects the blades to the main shaft of the turbine, allowing for rotation and energy generation.

• The Nacelle system houses the gearbox, generator, and other key components necessary for converting wind energy into electricity.

• Proper maintenance and monitoring of these systems are essential for optimal ...read more
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Q22. About documentation
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