Shyam Steel Industries Electrical Engineer Interview Questions and Answers

Q1. Can we use TIA Portal in S7-300 cpu?
Ans. 
No, TIA Portal is not compatible with S7-300 CPU.
• TIA Portal is designed for newer Siemens PLCs like S7-1200 and S7-1500, not S7-300.

• For S7-300 CPUs, Step 7 software should be used for programming.

• TIA Portal offers advanced features like integrated safety, motion control, and HMI design.

• S7-300 CPUs are older models with limited capabilities compared to newer PLCs.
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Q2. Difference between encoder and resolver?
Ans. 
Encoder provides digital output while resolver provides analog output.
• Encoder converts mechanical motion into digital signals, resolver converts mechanical motion into analog signals.

• Encoder is more accurate and provides higher resolution compared to resolver.

• Resolver is more robust and reliable in harsh environments due to lack of sensitive electronics.

• Examples: Encoder - optical encoder, magnetic encoder. Resolver - ...read more
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Q1. Salary negotiations...
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Q1. What is DC and AC motors
Ans. 
DC motors use direct current to generate rotational motion, while AC motors use alternating current.
• DC motors have a commutator and brushes to switch the current direction

• AC motors have a stator and rotor to create a rotating magnetic field

• DC motors are commonly used in household appliances and electric vehicles

• AC motors are commonly used in industrial machinery and HVAC systems
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Q1. Transformer me dub-11 ka matalab kya hota hai
Ans. Maine btaya “d” ka matalab Maine btaya transformer ka primary winding delta connect and “y” ka matalab Maine btaya transformer ka secondary winding star me connect hoti hai and “11” ka matalab hota hai transformer ka phase angle
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Q2. What is thyrestor
Ans. 
A thyristor is a semiconductor device that acts as a switch and can handle high voltages and currents.
• It has three terminals: anode, cathode, and gate

• It can be turned on by applying a small current to the gate terminal

• It can handle high power and is commonly used in power control applications

• Examples include AC motor speed control, lighting dimming, and power supplies
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What you prepared before starting the project.

Q1. Salary discussion.
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Q1. Job related question??
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Q2. Jobe role in previous company??
Ans. 
In my previous role, I led engineering projects, collaborated with cross-functional teams, and optimized processes for efficiency.
• Led a team of engineers to develop a new software application, resulting in a 30% increase in user engagement.

• Implemented Agile methodologies, which improved project delivery times by 25%.

• Collaborated with product management to define project scope and requirements, ensuring alignment with b...read more
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Q1. What is transformer?
Ans. 
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Electromagnetic Induction: Transformers operate on the principle of electromagnetic induction, allowing voltage levels to be increased or decreased.

• Types of Transformers: Common types include step-up transformers (increase voltage) and step-down transformers (decrease voltage).

• Applicatio...read more
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Q2. What is transformer working principle.
Ans. 
A transformer operates on electromagnetic induction to transfer electrical energy between circuits at different voltage levels.
• Electromagnetic Induction: A transformer works on the principle of electromagnetic induction, where a changing magnetic field induces voltage in nearby coils.

• Primary and Secondary Windings: It consists of two coils, the primary winding (input) and the secondary winding (output), wound around a ...read more
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Q3. Motor full load current calculation?
Ans. 
Motor full load current is calculated using the motor's power rating, voltage, and efficiency to ensure proper sizing and protection.
• Formula: Full Load Current (FLC) = (Power (kW) * 1000) / (Voltage (V) * √3 * Efficiency). Example: For a 10 kW motor at 400V and 90% efficiency, FLC = (10 * 1000) / (400 * √3 * 0.9).

• Consider Motor Type: Different motor types (e.g., induction, synchronous) may have different characteristic...read more
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Q1. Electrical department
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Q2. What is MCC PCC PANEL
Ans. 
MCC stands for Motor Control Center and PCC stands for Power Control Center. They are electrical panels used to control and distribute power to motors and other electrical equipment.
• MCC panels are used to control and distribute power to motors in industrial settings.

• PCC panels are used to control and distribute power to various electrical equipment.

• Both panels play a crucial role in ensuring efficient and safe operatio...read more
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Q1. Genarator protection
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Q2. Transformer protection
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Q3. What is induction motor
Ans. 
An induction motor is a type of AC motor where power is supplied to the rotor by electromagnetic induction.
• Induction motors are commonly used in various applications such as industrial machinery, pumps, fans, and compressors.

• They do not require brushes to transfer power to the rotor, making them more reliable and maintenance-free compared to brushed DC motors.

• The speed of an induction motor is determined by the frequen...read more
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Q4. Work principle transformer
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Q5. What is dc series motor
Ans. 
A DC series motor is a type of DC motor where the field winding is connected in series with the armature winding.
• Field winding and armature winding are connected in series

• High starting torque but low speed

• Used in applications where high starting torque is required, such as in traction applications
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Q6. Grid to TG sync process
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