INDO-MIM Electrical GET Interview Questions and Answers

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
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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. Generator protection
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Q2. Transformer protection
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Q3. Load distribution
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Q1. Tell me about yourself
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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
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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. Previous work. Electrical technical skill. Administration skill. Audit doccuments.
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Q2. Communication skill.
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Q1. What is PLC and how it is work
Ans. 
PLC stands for Programmable Logic Controller. It is an industrial computer used to automate processes and control machinery.
• PLCs are used in manufacturing, transportation, and energy industries

• They are programmed using ladder logic or other programming languages

• PLCs can monitor inputs from sensors and control outputs to actuators

• They are designed to be rugged and reliable in harsh industrial environments
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Q2. What is backless how measure
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Backless is a term used in electrical engineering to describe a device or equipment that does not have a back or rear panel.
• Backless devices are typically designed for easy access and maintenance.

• They may have open or exposed components on the back side.

• Examples of backless devices include open-frame power supplies and certain types of circuit boards.

• Backless equipment may require additional safety precautions due to t...read more
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Q1. What is turbine
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A turbine is a machine that converts the energy from a fluid flow into mechanical energy.
• Turbines are commonly used in power plants to generate electricity from steam or water flow.

• There are different types of turbines such as steam turbines, gas turbines, and water turbines.

• Turbines have blades that are rotated by the fluid flow, causing a shaft to spin and generate power.

• The mechanical energy produced by turbines can
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Q2. What is blast furnace
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A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.
• Used for smelting iron ores to produce iron

• Consists of a furnace chamber with a stack and tuyeres

• Operates at high temperatures using coke as fuel

• Produces molten iron and slag as byproducts
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Q3. What is transformer
Ans. 
A transformer is a 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 is connected to a power source, while secondary coil is connected to the load

• Works on the principle of electromagnetic induction to change voltage levels

• Used to step up or step down voltage levels in electrical systems

• Ex...read more
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Q4. Types of transformer
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Types of transformers include step-up, step-down, isolation, autotransformer, and distribution transformers.
• Step-up transformer increases voltage levels

• Step-down transformer decreases voltage levels

• Isolation transformer provides electrical isolation between primary and secondary windings

• Autotransformer has a single winding with multiple taps for different voltage levels

• Distribution transformer is used to supply power t
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Q5. Working principle of Transformers
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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 primary and secondary coils, which are wound around a core made of ferromagnetic material.

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

• This changing magnetic field induces a voltage in ...read more
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Q6. What is resistance
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Resistance is the opposition to the flow of electric current in a material.
• Resistance is measured in ohms (Ω).

• It is caused by collisions between electrons and atoms in a material.

• Materials with high resistance are insulators, while materials with low resistance are conductors.

• Resistance can be calculated using Ohm's Law: R = V/I, where R is resistance, V is voltage, and I is current.
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Q7. What is diode types of diode
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Diodes are electronic components that allow current to flow in one direction only. Common types include PN junction diodes, Zener diodes, Schottky diodes, and light-emitting diodes (LEDs).
• PN junction diodes: Basic diodes that allow current to flow in one direction only.

• Zener diodes: Diodes that operate in the reverse breakdown region and are used for voltage regulation.

• Schottky diodes: Diodes with a lower forward volta...read more
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Q8. What is power factor
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Power factor is a measure of how effectively electrical power is being used in a circuit.
• Power factor is the ratio of real power (kW) to apparent power (kVA) in an electrical circuit.

• It indicates how efficiently power is being converted into useful work.

• A power factor of 1 (or 100%) means all the power is being used effectively, while a power factor of 0 means none of the power is being used efficiently.

• Power factor ca...read more
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Q9. What is DC motor
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A DC motor is a type of electric motor that runs on direct current electricity, converting electrical energy into mechanical energy.
• DC motors have a rotating armature and a stationary field magnet

• They operate based on the principle of Lorentz force

• Common types include brushed and brushless DC motors

• DC motors are widely used in various applications such as robotics, electric vehicles, and industrial machinery
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Q10. Difference between AC and DC motor
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AC motors use alternating current and are more commonly used for industrial applications, while DC motors use direct current and are often used in household appliances.
• AC motors use alternating current, while DC motors use direct current

• AC motors are more commonly used in industrial applications, while DC motors are often used in household appliances

• AC motors are generally more efficient and require less maintenance co...read more
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Q11. What is electromagnetic field
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An electromagnetic field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field.
• Consists of electric and magnetic components

• Generated by electric charges and currents

• Can be static or dynamic

• Used in various applications such as wireless communication and MRI machines
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Q12. Types of motor and working principles
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Types of motors include DC motors, AC motors, synchronous motors, and induction motors. Each type operates based on different principles.
• DC motors operate using direct current and have a commutator to switch the current direction, examples include brushed and brushless DC motors.

• AC motors operate using alternating current and include types like synchronous motors and induction motors.

• Synchronous motors rotate at a cons...read more
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Q13. What is V F D
Ans. 
VFD stands for Variable Frequency Drive, a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the motor.
• VFDs are used to control the speed and torque of AC motors in various applications.

• They are commonly used in HVAC systems, industrial pumps, fans, and conveyor systems.

• VFDs can improve energy efficiency by matching the motor speed to the actual load requirements.

• Th...read more
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Q14. What is earthing
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Earthing is the process of connecting electrical equipment to the earth to prevent electric shocks and ensure safety.
• Earthing provides a path for fault currents to flow safely into the ground.

• It helps in protecting equipment and individuals from electrical faults.

• Earthing reduces the risk of fire hazards in electrical systems.

• Types of earthing include plate earthing, pipe earthing, and rod earthing.

• Proper earthing is e...read more
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Q15. Types of motor and working principle
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Types of motors include DC motors, AC motors (induction, synchronous), stepper motors, and servo motors. Each type operates based on different principles.
• DC motors operate on the principle of Lorentz force, where a current-carrying conductor experiences a force in a magnetic field.

• AC induction motors work on the principle of electromagnetic induction, where a rotating magnetic field induces current in the rotor.

• AC sync...read more
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Q16. What is contactor
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A contactor is an electrical device used to switch an electrical circuit on or off.
• Contactor is typically used in applications where high current needs to be controlled, such as in industrial machinery.

• It consists of a coil which when energized creates a magnetic field that pulls in a set of contacts to make or break the circuit.

• Contactor can be controlled manually or automatically through a control system.

• Common examp...read more
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Q17. What is cooking and crawling
Ans. 
Cooking and crawling are terms used in electrical engineering to describe the movement of a circuit breaker's contacts.
• Cooking refers to the slow separation of the contacts when the circuit breaker is opened under load.

• Crawling refers to the movement of the contacts due to the presence of small currents even when the circuit breaker is in the closed position.
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