100+ Electrical GET Interview Questions and Answers for Freshers

Ohm's Law relates voltage, current, and resistance in electrical circuits. AC is a changing current direction, while DC is constant. Analog signals are continuous, digital signals are discrete. Power dissipation in a resistor is calculated using P = I^2 * R.

• Ohm's Law states V = I * R, where V is voltage, I is current, and R is resistance.

• AC changes direction periodically, while DC flows in one direction constantly.

• Analog signals have infinite possible values, while digital si...read more

A relay is an electrically operated switch that uses an electromagnet to control the flow of current in a circuit. A circuit breaker is a device that automatically interrupts the flow of current in a circuit when it detects an overload or short circuit.

• Relay is an electrically operated switch

• It uses an electromagnet to control the flow of current

• Circuit breaker automatically interrupts current flow in case of overload or short circuit

Thermal Power Plants use non-renewable sources like coal, while Super Thermal Power Plants have higher efficiency and capacity.

• Thermal Power Plants typically have lower efficiency and capacity compared to Super Thermal Power Plants.

• Super Thermal Power Plants use advanced technologies to achieve higher efficiency in power generation.

• Examples of Thermal Power Plants include NTPC Dadri in India, while examples of Super Thermal Power Plants include Mundra Thermal Power Station in...read more

Using a robot to control temperature in a manufacturing plant and shut it down if it exceeds a set value.

• Create a flow diagram for the manufacturing process using a robot

• Incorporate a temperature sensor in the plant to monitor the temperature

• Set a specific temperature threshold for the plant operation

• Program the robot to shut down the plant if the temperature exceeds the set value

DC motors, transformers, synchronous and induction machines are all important components in electrical engineering.

• DC motors are classified into various types such as brushed DC motors, brushless DC motors, and stepper motors.

• Transformers are electrical devices that transfer electrical energy between two or more circuits through electromagnetic induction.

• Synchronous machines operate at a constant speed and are used in applications where precise control of speed is required, s...read more

Voltage conditioning, DSP, and common mode rejection are important concepts in the operation of operational amplifiers (op amps).

• Voltage conditioning involves adjusting the input voltage to a level that is suitable for the op amp to process.

• DSP (Digital Signal Processing) refers to the manipulation of signals using digital techniques, often used in conjunction with op amps for signal processing.

• Common mode rejection ratio (CMRR) of an op amp is a measure of its ability to rej...read more

Types of losses in power distribution include resistance losses, core losses, and dielectric losses.

• Resistance losses occur due to the resistance of the conductors, leading to heat dissipation.

• Core losses occur in transformers due to hysteresis and eddy current losses.

• Dielectric losses occur in insulating materials due to polarization and leakage currents.

Different types of windings in transformers include primary winding, secondary winding, and tertiary winding.

• Primary winding: receives electrical power from the source

• Secondary winding: delivers electrical power to the load

• Tertiary winding: used in special transformers for specific applications

• Auto-transformer winding: single winding used as both primary and secondary

• Leakage winding: used to reduce leakage flux in the transformer

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers are used to increase or decrease the voltage levels in electrical power transmission and distribution systems.

• Synchronous machines are AC machines that operate at a constant speed and are used for power generation.

• Induction machines are AC machines that operate at variable speeds and are commonly used in industrial applications.

• DC ...read more

Different types of losses in a transformer include copper losses, iron losses, and stray losses.

• Copper losses: Also known as I^2R losses, occur in the windings due to resistance.

• Iron losses: Also known as core losses, occur in the core due to hysteresis and eddy currents.

• Stray losses: Occur due to leakage flux and imperfect magnetic coupling.

• Eddy current losses: Occur in the core due to circulating currents induced by changing magnetic fields.

• Hysteresis losses: Occur in the c...read more

AC works by converting electrical energy into mechanical energy to create a cooling effect. Efficiency can be improved by using energy-efficient components and regular maintenance.

• AC works by using a compressor to convert electrical energy into mechanical energy, which is used to pump refrigerant through the system to create a cooling effect.

• Efficiency can be improved by using energy-efficient components such as high SEER rated units, proper insulation, and regular maintenanc...read more

The principle of transformer is based on electromagnetic induction, where a changing magnetic field induces a voltage in a coil. Induction machines work on the principle of electromagnetic induction to convert electrical energy into mechanical energy.

• Transformer operates on the principle of mutual induction, where two or more coils are wound on a common magnetic core.

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

Quality refers to the degree of excellence or superiority of a product or service.

• Quality is determined by meeting or exceeding customer expectations.

• It involves ensuring that products or services are free from defects or deficiencies.

• Quality can be measured through various metrics such as reliability, durability, and performance.

• Implementing quality control processes and continuous improvement initiatives are essential.

• Quality is crucial for customer satisfaction and buildin...read more

A gate is a digital circuit that performs a specific logical function. There are different types of gates such as AND, OR, NOT, etc.

• Gates are fundamental building blocks of digital circuits.

• Each gate performs a specific logical operation, such as AND, OR, NOT, etc.

• Common types of gates include AND gate, OR gate, NOT gate, NAND gate, NOR gate, XOR gate, XNOR gate.

• Gates are used to manipulate binary data in digital electronics.

• The number of gates in a circuit depends on the com...read more

Neutral wire is typically white or gray, while ground wire is typically green or bare copper.

• Neutral wire is usually white or gray in color.

• Ground wire is typically green or bare copper.

• In some cases, ground wire may also be green with a yellow stripe.

• It is important to always follow local electrical codes when identifying wire colors.

Switch gear is a combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment.

• Switch gear is used to control the flow of electricity in a power system.

• It is essential for protecting electrical equipment from damage due to overloads or short circuits.

• Common applications of switch gear include power distribution, industrial plants, and electrical substations.

The average soil bearing capacity of a 2bhk depends on various factors such as soil type, depth, and quality.

• Soil bearing capacity can range from 1,500 to 5,000 pounds per square foot for residential buildings.

• Factors like soil type (clay, sand, gravel), depth of soil, and quality of soil affect the bearing capacity.

• Consulting a geotechnical engineer is recommended to determine the specific soil bearing capacity for a 2bhk construction.

Types of induction machines include squirrel cage induction motors and wound rotor induction motors.

• Squirrel cage induction motors have a simple and rugged construction, suitable for constant speed applications.

• Wound rotor induction motors have external resistors connected to the rotor windings, allowing for adjustable speed and high starting torque.

• Other types include double cage induction motors and single-phase induction motors.

• Examples include Siemens SIMOTICS SD100, ABB ...read more

A combination of both standard and arc fault circuit breakers are used in my home.

• Standard circuit breakers are used to protect against overloads and short circuits.

• Arc fault circuit breakers are used to detect and prevent electrical fires caused by arcing faults.

• Both types of circuit breakers provide different levels of protection for electrical circuits.

• Examples: Square D QO series for standard circuit breakers, Siemens QA series for arc fault circuit breakers.

Power distribution system is a network of electrical components used to deliver electricity from the generation source to the end users.

• Power generation at a central location

• Transmission of electricity through high voltage lines

• Distribution through substations and transformers

• Delivery to end users via distribution lines

• Utilization by consumers for various applications

An RC circuit involves a resistor and capacitor connected in series, with the capacitor charging and discharging over time.

• RC circuit consists of a resistor and capacitor connected in series

• The capacitor charges and discharges through the resistor, affecting the voltage across the circuit

• The charge-discharge graph of an RC circuit shows exponential growth and decay

• Equations used to analyze RC circuits include V = V0(1 - e^(-t/RC)) for charging and V = V0(e^(-t/RC)) for discha...read more

Generators and alternators are both electrical devices that convert mechanical energy into electrical energy, but they differ in their construction and working principles.

• Generators produce direct current (DC) while alternators produce alternating current (AC).

• Generators use a commutator and brushes to convert mechanical energy into electrical energy, while alternators use slip rings and brushes.

• Generators are typically used in small-scale applications like portable power sup...read more

Check if a string is a palindrome by comparing it with its reverse.

• Create a function that takes a string as input

• Reverse the string and compare it with the original string

• If they are the same, the string is a palindrome

Types of rectifiers include half-wave, full-wave, and bridge rectifiers.

• Half-wave rectifier only allows one half of the AC input waveform to pass through

• Full-wave rectifier allows both halves of the AC input waveform to pass through

• Bridge rectifier uses four diodes to rectify the AC input waveform

• Examples include diode rectifiers and semiconductor rectifiers

Impedance is the opposition to the flow of alternating current in a circuit. Transformers are devices that transfer electrical energy between two or more circuits through electromagnetic induction. A microcontroller is a small computer on a single integrated circuit that contains a processor core, memory, and programmable input/output peripherals. A rectifier is an electrical device that converts alternating current into direct current.

• Impedance is measured in ohms and is rep...read more

Torque variation in squirrel cage motors is achieved by changing the rotor resistance.

• Torque in squirrel cage motors can be varied by changing the rotor resistance.

• Increasing the rotor resistance will increase the torque produced by the motor.

• Decreasing the rotor resistance will decrease the torque produced by the motor.

• This method is commonly used in applications where variable torque is required, such as in fans or pumps.

Digital payments in India have revolutionized the way transactions are conducted, leading to increased convenience and financial inclusion.

• Digital payments have increased financial inclusion by providing access to banking services for the unbanked population.

• The adoption of digital payments has reduced the reliance on cash transactions, leading to a more transparent economy.

• Digital payment platforms like Paytm, Google Pay, and PhonePe have gained popularity and are widely use...read more

Power generation involves converting various forms of energy into electrical power, which is then distributed through a network of transmission lines and substations to end users.

• Power generation involves converting mechanical, chemical, solar, wind, or nuclear energy into electrical power

• The generated power is then transmitted through high-voltage transmission lines to substations

• Substations step down the voltage for distribution to residential, commercial, and industrial us...read more

Resistance, inductance, and admittance are fundamental electrical properties that affect the flow of current in a circuit.

• Resistance is the opposition to the flow of current in a circuit, measured in ohms. It dissipates energy in the form of heat. Example: a light bulb.

• Inductance is the property of a circuit that opposes changes in current flow, measured in henries. It stores energy in a magnetic field. Example: a coil or solenoid.

• Admittance is the reciprocal of impedance and...read more

PLC troubleshooting involves identifying and resolving issues with programmable logic controllers in industrial automation systems.

• Understanding the PLC program and ladder logic

• Checking for faulty wiring or connections

• Testing input and output devices

• Analyzing error codes and alarms

• Using diagnostic tools like PLC software or multimeters

Semiconductors are materials with conductivity between conductors and insulators. Resistors limit the flow of electric current. Transistors are semiconductor devices used for amplification and switching.

• Semiconductors have conductivity between conductors and insulators (e.g. silicon, germanium)

• Resistors limit the flow of electric current in a circuit (e.g. carbon film resistor, wirewound resistor)

• Transistors are semiconductor devices used for amplification and switching (e.g....read more

Pumps are used to move fluids, while compressors are used to increase the pressure of gases.

• Pumps are used to transfer fluids from one place to another, while compressors are used to increase the pressure of gases.

• Pumps work with liquids, while compressors work with gases.

• Pumps generally have a lower pressure ratio compared to compressors.

• Examples: Water pump for irrigation, air compressor for pneumatic tools.

Motors convert electrical energy into mechanical energy to produce motion, while pumps are devices that move fluids by mechanical action.

• Motors convert electrical energy into mechanical energy to produce motion

• Pumps are devices that move fluids by mechanical action

• Motors are used in various applications such as fans, conveyor belts, and electric vehicles

• Pumps are used in applications like water circulation, oil refining, and HVAC systems

Mechatronics is a multidisciplinary field that combines mechanical engineering, electronics, computer science, and control engineering.

• Combines mechanical engineering, electronics, computer science, and control engineering

• Involves designing, developing, and controlling advanced systems

• Examples include robotics, automated manufacturing systems, and automotive systems

Silica gel in transformers is used as a drying agent to absorb moisture and prevent the formation of harmful gases.

• Silica gel is a desiccant that absorbs moisture from the air to keep the transformer dry.

• It helps prevent the formation of harmful gases like hydrogen and carbon monoxide, which can degrade the transformer insulation.

• Silica gel is typically placed in a breather to absorb moisture as air enters and exits the transformer.

• Regular monitoring and replacement of silica...read more

Control systems are used to manage and regulate the behavior of other systems or devices.

• Thermostat in a heating system

• Cruise control in a car

• Automatic door opening system

• PID controller in industrial processes

Copper and aluminum conductors are commonly used in transmission lines.

• Copper conductors have high conductivity and are often used in high voltage transmission lines.

• Aluminum conductors are lighter and cheaper, making them suitable for long distance transmission lines.

• Composite conductors, such as Aluminum Conductor Steel Reinforced (ACSR), are also used for their strength and conductivity.

Transformers are rated in kVA instead of kW because kVA takes into account both real power (kW) and reactive power (kVAR).

• kVA accounts for both real power (kW) and reactive power (kVAR)

• kW only measures the real power being used by the load

• Transformers need to be sized based on the total power (kVA) to handle both real and reactive power components

Electronics play a crucial role in today's world by enabling communication, automation, entertainment, and innovation.

• Facilitates communication through devices like smartphones and computers

• Enables automation in industries and homes through sensors and control systems

• Provides entertainment through TVs, gaming consoles, and music players

• Drives innovation in fields like healthcare, transportation, and energy with advanced electronic devices

MOSFET is a type of transistor that uses an electric field to control the flow of current.

• MOSFET stands for Metal-Oxide-Semiconductor Field-Effect Transistor.

• It has three terminals: gate, source, and drain.

• The gate terminal controls the flow of current between the source and drain.

• MOSFETs are commonly used in amplifiers, switches, and digital circuits.

• They are known for their high input impedance and fast switching speeds.

IDMT relay is used for overcurrent protection while transformer differential relay is used for differential protection.

• IDMT relay operates based on inverse time-current characteristic curve

• Transformer differential relay compares the currents entering and leaving the transformer windings

• IDMT relay is used for protecting electrical equipment from overcurrents

• Transformer differential relay is used for detecting internal faults in transformers

Communication modules in PLCs are hardware components that allow the PLC to communicate with other devices or systems.

• Communication modules provide various communication interfaces such as Ethernet, serial ports, Profibus, Profinet, etc.

• They enable the PLC to exchange data with other PLCs, HMIs, SCADA systems, or external devices like sensors and actuators.

• Some communication modules support wireless communication protocols like Wi-Fi or Bluetooth.

• Examples of communication mod...read more

Types of transformer losses include copper losses, iron losses, and stray losses.

• Copper losses: Also known as I^2R losses, occur in the copper windings of the transformer due to resistance.

• Iron losses: Also known as core losses, occur in the transformer core due to hysteresis and eddy currents.

• Stray losses: Occur due to leakage flux and imperfect magnetic coupling between the windings.

• Examples: An example of copper losses would be heat generated in the transformer windings. A...read more

Transportation and logistics play a crucial role in the market by ensuring efficient movement of goods and services.

• Transportation helps in connecting producers with consumers by moving goods from one place to another.

• Logistics involves the coordination of resources and processes to ensure timely delivery of products.

• Efficient transportation and logistics can lead to cost savings and improved customer satisfaction.

• Examples: Amazon's efficient delivery network, FedEx's global ...read more

A ground and motorized circuit breaker diagram includes components like ground connection, motorized mechanism, and control circuit.

• Ground connection is typically represented by a symbol resembling three horizontal lines connected to a point.

• Motorized circuit breaker includes a motorized mechanism for opening and closing the circuit.

• Control circuit is used to operate the motorized mechanism of the circuit breaker.

• Example: Ground symbol connected to the ground terminal, motori...read more

Yes, I am willing to relocate to any corner of India for the job.

• I am open to relocating for the right opportunity

• I have no geographical restrictions for my career growth

• I am adaptable and willing to embrace new environments

Transformers can be classified into different types based on their construction, purpose, and voltage levels.

• Based on Construction: Shell type, Core type, Berry type

• Based on Purpose: Power transformer, Distribution transformer, Instrument transformer

• Based on Voltage Levels: Step-up transformer, Step-down transformer, Auto transformer