Siemens Senior Electrical Engineer Interview Questions and Answers for Experienced

Q1. Firstly resume shortlist and after that interview related to technical questions
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Shortlist in interview round after that training for final shortlist

Q1. Basic technical questions regarding engineering
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Q1. Programming questions and some basic general questions
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Q1. Behavioural questions
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Q2. Academics based questions
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It was hard and took around 2 hrs to complete it

Q1. It was hard and all questions related to transformer and it's losses and induction motor.
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Q1. What is fermentation
Ans. 
Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes.
• Fermentation is a metabolic process that converts carbohydrates, such as sugars and starches, into alcohol or organic acids using microorganisms like yeast or bacteria.

• Common examples of fermentation include the production of beer, wine, yogurt, and bread.

• Fermentation is used in various industries such...read more
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The first round was a gamified aptitude test, and shortlisting was conducted based on sectional cutoffs. Female candidates were given higher preference.

Q1. Basic questions on Transformer
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Q2. Working of circuit Breakers and relays
Ans. 
Circuit breakers are devices that automatically stop the flow of electricity when a fault is detected, while relays are switches that open or close circuits based on electrical signals.
• Circuit breakers are designed to protect electrical circuits from damage caused by overcurrent or short circuits.

• They work by detecting abnormal current flow and quickly interrupting the circuit to prevent damage.

• Relays are electromechan...read more
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Q3. What is corona loss, insulators, Ferranti effect and all the basics of ETD
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Q4. What is a Buchholz relay and how does it work?
Ans. 
A Buchholz relay is a protective device used in oil-filled transformers to detect and prevent internal faults.
• Detects faults such as insulation breakdown or arcing within the transformer

• Consists of a float switch connected to an alarm or trip circuit

• When gas or oil accumulates due to a fault, the float rises and triggers the alarm or trip signal

• Helps prevent major damage to the transformer by isolating it from the powe...read more
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Q5. Principle of Induction motor and what is mutual inductance
Ans. 
Induction motor operates on the principle of electromagnetic induction. Mutual inductance is the measure of the coupling between two coils.
• Induction motor works on the principle of electromagnetic induction where a rotating magnetic field is produced to induce current in the rotor, causing it to rotate.

• Mutual inductance is the measure of the coupling between two coils, indicating how much of the magnetic field produced...read more
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