Siemens Electrical Technician Interview Questions, Process, and Tips

Q1. Safety relay working principal
Ans. 
Safety relay is an electromechanical device that monitors the safety functions of a machine and stops it if a safety issue is detected.
• Safety relays are used to monitor safety functions such as emergency stops, guard doors, light curtains, etc.

• They work by using input signals from safety devices to determine if the machine is in a safe state.

• If a safety issue is detected, the safety relay will open its contacts and sto...read more
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Q1. Introduction your self
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I am an experienced Electrical Engineer with expertise in designing and implementing electrical systems.
• I have a Bachelor's degree in Electrical Engineering from XYZ University.

• I have worked for 5 years at ABC Company, where I designed and implemented electrical systems for commercial buildings.

• I am proficient in using CAD software for creating electrical schematics and layouts.

• I have experience in troubleshooting and ...read more
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Q2. Technical answer
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Q3. What is oms law What resistance unit
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Ohm's Law is a fundamental principle in electrical engineering that relates the current flowing through a conductor to the voltage across it and the resistance of the conductor.
• Ohm's Law states that the current (I) flowing through a conductor is directly proportional to the voltage (V) across it and inversely proportional to the resistance (R) of the conductor.

• The formula for Ohm's Law is: V = I * R, where V is the vol...read more
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Q4. What's current unit
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The current unit is the ampere (A), which measures the flow of electric charge.
• The ampere is named after the French physicist André-Marie Ampère.

• Current is the rate at which electric charge flows through a conductor.

• Other common units for current include milliamperes (mA) and microamperes (μA).
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Q5. Write the voltage unit
Ans. 
The voltage unit is measured in volts (V).
• The voltage unit is denoted by the symbol V.

• Voltage is the potential difference between two points in an electrical circuit.

• Common examples of voltage units include millivolts (mV), kilovolts (kV), and megavolts (MV).
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Q1. Introduction in the technical My self Suneel meena for electrical engineering rtu kota 67.28 % My b.tech electrical engineering my b.tech complete in 2021 and i have work in 132 kv sub station bhar...read more
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Q2. Tell me about my self
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Q3. Introduction in my self
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Q1. What is your experience.
Ans. 
I have 5 years of experience working as an Electrical Engineer in the power generation industry.
• 5 years of experience in power generation industry

• Proficient in designing electrical systems

• Skilled in troubleshooting and maintenance of electrical equipment

• Experience with PLC programming and control systems

• Knowledge of industry standards and regulations
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Q2. What is your salary expectation
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I am looking for a competitive salary that aligns with my experience and skills in the industry.
• Research industry standards for Electrical Engineers in the specific location

• Consider years of experience and level of expertise

• Factor in benefits and perks offered by the company

• Be prepared to negotiate based on the overall compensation package
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Q1. Transformers working principle
Ans. 
Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
• Transformers have two coils of wire, known as the primary and secondary coils.

• When an alternating current flows through the primary coil, it creates a changing magnetic field.

• This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy.

• The ratio of the number...read more
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Q2. Different type of sensors
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Different types of sensors include temperature sensors, pressure sensors, proximity sensors, motion sensors, and light sensors.
• Temperature sensors - measure temperature changes

• Pressure sensors - measure pressure changes

• Proximity sensors - detect nearby objects without physical contact

• Motion sensors - detect movement or changes in position

• Light sensors - detect light intensity or brightness
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Q1. What is fermentation
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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
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Q5. Principle of Induction motor and what is mutual inductance
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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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