Godawari Power & Ispat Senior Electrical Engineer Interview Questions and Answers

Q1. Transformer maintenance
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Q2. Panel MCC PCC maintenance
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Q3. Motor maintenance
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Q1. Lighting maintenance
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Q2. HT breaker maintenance
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Q1. What is Transformers, Motor, Genretor, Electric genetion
Ans. 
Transformers, motors, generators, and electric generation are essential components in electrical systems.
• Transformers are devices that transfer electrical energy between two or more circuits through electromagnetic induction.

• Motors convert electrical energy into mechanical energy to drive machinery.

• Generators convert mechanical energy into electrical energy.

• Electric generation involves the process of producing electric...read more
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Q2. KVL,KCL,Thevenin Theorem,Nodal analysis
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Q3. Can you explain what a DC motors
Ans. 
DC motors are electric motors that operate using direct current (DC) power sources.
• DC motors convert electrical energy into mechanical energy through the interaction of magnetic fields.

• They are commonly used in appliances, power tools, and electric vehicles.

• DC motors have two main types: brushed DC motors and brushless DC motors.

• Brushed DC motors use brushes to conduct current, while brushless DC motors use electronic ...read more
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Number System, coding and decoding, Analogies

Q1. What is Nodal analysis
Ans. 
Nodal analysis is a method used in electrical engineering to determine the voltage at each node in a circuit.
• Nodal analysis involves writing Kirchhoff's Current Law equations for each node in a circuit.

• It is used to analyze complex circuits with multiple nodes and voltage sources.

• The goal of nodal analysis is to determine the voltage at each node relative to a reference point, usually ground.

• It is a powerful tool for s...read more
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Q2. Explain the Transformer
Ans. 
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Consists of two coils of wire, known as primary and secondary coils

• Primary coil receives electrical energy and creates a magnetic field

• Magnetic field induces a voltage in the secondary coil, transferring energy

• Used to step up or step down voltage levels in power distribution systems

• Commo...read more
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Q1. Single line diagram of the plant which you are working now.
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The single line diagram of the plant I am working at shows the electrical connections and components in a simplified manner.
• The single line diagram typically includes power sources, distribution lines, transformers, circuit breakers, and loads.

• It provides a high-level overview of the electrical system without showing the physical location of each component.

• Symbols are used to represent different electrical components a...read more
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Q1. Power factor What is vfd Difference between ac and dc motor
Ans. 
Power factor is the ratio of real power to apparent power in an AC circuit. VFD stands for Variable Frequency Drive. AC motors run on alternating current while DC motors run on direct current.
• Power factor is a measure of how effectively electrical power is being used in a circuit.

• It is calculated by dividing the real power (in watts) by the apparent power (in volt-amperes).

• A power factor of 1 indicates that all the pow...read more
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Q2. Types of load cell
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Types of load cells include strain gauge load cells, hydraulic load cells, and capacitive load cells.
• Strain gauge load cells measure the strain or deformation of a material.

• Hydraulic load cells use hydraulic fluid to measure force.

• Capacitive load cells measure changes in capacitance to determine force.

• Other types of load cells include piezoelectric load cells and pneumatic load cells.
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Q1. What is motor ?
Ans. 
A motor is a device that converts electrical energy into mechanical energy to produce motion.
• Motors are commonly used in various applications such as industrial machinery, household appliances, and vehicles.

• There are different types of motors including AC motors, DC motors, and servo motors.

• Motors consist of a rotor, stator, and various components such as coils, magnets, and brushes.

• Examples of motors include electric
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Q2. What is vcb ?
Ans. 
VCB stands for Vacuum Circuit Breaker, a type of circuit breaker that uses vacuum as the arc quenching medium.
• VCB is a type of circuit breaker that uses vacuum as the arc quenching medium.

• It is used to interrupt the current flow in case of a fault or overload in the electrical system.

• VCBs are commonly used in medium voltage applications.

• They are more reliable and require less maintenance compared to other types of circ
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Q1. Which type of protection used in a substation
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Different types of protection are used in a substation to ensure safety and reliability.
• Overcurrent protection: Protects against excessive current flow.

• Overvoltage protection: Safeguards against high voltage surges.

• Differential protection: Detects faults by comparing currents entering and leaving the substation.

• Distance protection: Protects transmission lines based on the distance to the fault.

• Ground fault protection: ...read more
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Q2. Which type of ht breaker used in ht line
Ans. 
Different types of HT breakers are used in HT lines depending on the specific requirements.
• Air Circuit Breaker (ACB) is commonly used in HT lines for its high breaking capacity and quick response time.

• Vacuum Circuit Breaker (VCB) is another popular choice due to its compact size and low maintenance requirements.

• SF6 Circuit Breaker is used for high voltage applications as it provides excellent arc quenching properties.

• O...read more
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Q1. Electrical maintenance
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Q2. Crane maintenance
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Q1. What is the plc and scada also described the structure of layout of installation of generator
Ans. 
PLC and SCADA are control systems used in industrial automation. Generator installation layout includes fuel system, cooling system, and electrical connections.
• PLC (Programmable Logic Controller) is a digital computer used for automation of electromechanical processes.

• SCADA (Supervisory Control and Data Acquisition) is a system used for monitoring and controlling industrial processes.

• Generator installation layout inclu...read more
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Q2. Whai is star delta ckt
Ans. 
Star delta circuit is a method of starting three-phase induction motors.
• It reduces the starting current and torque of the motor.

• It involves connecting the motor windings in a star configuration during starting and then switching to a delta configuration once the motor is up to speed.

• It is commonly used in applications where the motor is large or the starting current needs to be limited.

• It is also known as Wye-Delta sta...read more
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