Electrician

filter-iconFilter interviews by

300+ Electrician Interview Questions and Answers

Updated 8 Mar 2025

Popular Companies

search-icon

Q51. What is the meaning of interview?

Ans.

An interview is a formal conversation between an employer and a candidate to assess the candidate's suitability for a job.

  • An interview is a process where the employer asks questions to evaluate the candidate's skills, qualifications, and experience.

  • It is an opportunity for the candidate to showcase their abilities and demonstrate why they are the best fit for the job.

  • Interviews can be conducted in person, over the phone, or through video conferencing.

  • The purpose of an intervi...read more

Q52. How handaling electrical breck down?

Ans.

Handling electrical breakdown involves identifying the issue, ensuring safety, troubleshooting, and repairing the problem.

  • Identify the cause of the breakdown by checking for blown fuses, tripped circuit breakers, or damaged wiring.

  • Ensure safety by turning off the power supply and wearing appropriate protective gear.

  • Troubleshoot the problem by using electrical testing tools to locate the faulty component or wiring.

  • Repair the issue by replacing damaged parts, fixing faulty wiri...read more

Q53. Why are the 230 volt only in 1 phase not 440?

Ans.

230V is sufficient for most domestic and commercial applications, while 440V is used for heavy-duty industrial applications.

  • 230V is more cost-effective and easier to install than 440V.

  • Most household appliances and equipment are designed to operate on 230V.

  • 440V is used for heavy machinery and equipment that require more power.

  • 440V is also used for long-distance power transmission.

  • The choice of voltage depends on the specific application and power requirements.

Q54. What are some limitations of your favourite programming language?

Ans.

Some limitations of my favorite programming language include lack of built-in parallel processing support and limited standard library functions.

  • Lack of built-in parallel processing support can make it challenging to efficiently utilize multiple cores for performance optimization.

  • Limited standard library functions may require developers to rely on third-party libraries or write custom code for certain tasks.

  • Difficulty in handling memory management can lead to memory leaks and...read more

Are these interview questions helpful?

Q55. What is the significance of understanding the key aspects of unfamiliar tasks?

Ans.

Understanding key aspects of unfamiliar tasks is crucial for successful completion and avoiding mistakes.

  • Helps in identifying potential challenges and obstacles

  • Allows for proper planning and allocation of resources

  • Reduces the risk of errors and accidents

  • Increases efficiency and productivity

  • Enhances problem-solving skills

  • Example: Before working on a new electrical system, understanding the wiring diagrams and safety protocols is essential.

Q56. What is the primary tools for an electrician.

Ans.

The primary tools for an electrician include pliers, wire strippers, screwdrivers, voltage testers, and power drills.

  • Pliers are used to grip and twist wires and other components.

  • Wire strippers are used to remove insulation from wires.

  • Screwdrivers are used to tighten or loosen screws.

  • Voltage testers are used to check if a circuit is live or not.

  • Power drills are used to drill holes and drive screws.

Share interview questions and help millions of jobseekers 🌟

man-with-laptop

Q57. How many mm cable is suitable for the 15 Hp induction motor

Ans.

The suitable cable size for a 15 Hp induction motor would typically be around 10 mm.

  • The cable size for a motor depends on factors like the motor's power rating, voltage, and distance from the power source.

  • For a 15 Hp motor, a cable size of around 10 mm would be suitable to handle the power requirements.

  • It is important to consult with a qualified electrician or refer to the motor manufacturer's guidelines for the exact cable size needed.

Q58. How many programming languages do you know?

Ans.

I am proficient in three programming languages: Java, Python, and C++.

  • Java

  • Python

  • C++

Electrician Jobs

Electrician 1-5 years
The Akshayapatra Foundation
4.5
₹ 3 L/yr - ₹ 3 L/yr
Mangaluru
Electrician 1-2 years
InterContinental Hotels Group (India) Pvt. Ltd
3.9
Gurgaon / Gurugram
Electrician - (Wireman License is Must) 4-6 years
Gokaldas Exports
3.9
Bangalore / Bengaluru

Q59. What is the RTD and thermocouple

Ans.

RTD stands for Resistance Temperature Detector and Thermocouple is a temperature sensor made of two different metals.

  • RTD measures temperature by detecting changes in electrical resistance of a metal wire as temperature changes.

  • Thermocouple generates a voltage proportional to the temperature difference between its two junctions.

  • RTD is more accurate and stable than thermocouple.

  • Thermocouple is cheaper and can measure a wider range of temperatures than RTD.

  • RTD is commonly used i...read more

Q60. How to calculate three phase motor current?

Ans.

Three phase motor current can be calculated using the formula I = P / (sqrt(3) * V * PF)

  • Determine the power factor (PF) of the motor

  • Find the voltage (V) of the power supply

  • Calculate the power (P) consumed by the motor

  • Use the formula I = P / (sqrt(3) * V * PF) to calculate the current (I)

  • Make sure to convert the units to match the formula

Q61. Q 1 how would describe tha manegment styles of tha organization??

Ans.

The management style of the organization is collaborative and inclusive, with a focus on empowering employees to make decisions.

  • Encourages open communication and feedback

  • Values teamwork and collaboration

  • Empowers employees to take initiative and make decisions

  • Focuses on employee development and growth

  • Promotes a positive work culture and values diversity

Q62. What is the change over for DG andMSEB

Ans.

Change over for DG and MSEB refers to the process of switching power supply from a diesel generator to the Maharashtra State Electricity Board grid.

  • Change over for DG and MSEB is necessary during power outages or maintenance work.

  • It involves switching the power source from the diesel generator to the MSEB grid or vice versa.

  • Proper synchronization and safety measures are crucial during the changeover process.

  • The changeover process should be done by qualified electricians to av...read more

Q63. DecribeStar Delta Starter Control and Power Diagram?

Ans.

Star Delta Starter is a type of motor starter used to reduce the starting current of a motor.

  • It consists of a contactor, timer, overload relay, and power wiring.

  • During starting, the motor is connected in star configuration to reduce the voltage and current.

  • After a set time, the motor is switched to delta configuration for normal operation.

  • The power diagram shows the connections between the components and the motor.

  • It is commonly used for large motors to prevent damage to the ...read more

Q64. What are the differences between single-phase and three-phase systems?

Ans.

Single-phase systems have one live wire and one neutral wire, while three-phase systems have three live wires and one neutral wire.

  • Single-phase systems are commonly used in residential buildings, while three-phase systems are used in industrial settings.

  • Single-phase systems provide a lower power capacity compared to three-phase systems.

  • Three-phase systems are more efficient for running large motors and machinery.

  • Single-phase systems have a sinusoidal waveform, while three-pha...read more

Q65. What design software do you know? Which do you prefer?

Ans.

I am proficient in AutoCAD and prefer using it for electrical design work.

  • Proficient in AutoCAD for electrical design

  • Familiar with Revit for building information modeling

  • Comfortable using SolidWorks for mechanical design

Q66. what is difference between DC motor and induction motor

Ans.

DC motors use direct current to produce rotational motion while induction motors use alternating current and electromagnetic induction.

  • DC motors have a commutator and brushes while induction motors do not.

  • DC motors have a constant speed while induction motors have a variable speed.

  • DC motors are more efficient at low speeds while induction motors are more efficient at high speeds.

  • DC motors are commonly used in small applications like toys and appliances while induction motors ...read more

Q67. Which instrument are use to check earthing and what should be the value of earthing. Type of maintenance . etc.

Ans.

Instruments used to check earthing and value of earthing in electrical maintenance.

  • The instruments used to check earthing include earth testers, earth meggers, and clamp meters.

  • The value of earthing should be less than 1 ohm for electrical safety.

  • Earthing is a part of preventive maintenance to ensure safety and proper functioning of electrical equipment.

Q68. What will happen when nutral and pase will connected each other

Ans.

Connecting neutral and phase will create a short circuit.

  • Connecting neutral and phase will cause a short circuit and trip the circuit breaker.

  • This can cause damage to electrical equipment and pose a safety hazard.

  • It is important to always ensure proper wiring connections to prevent accidents.

  • Examples of accidents caused by improper wiring include electrical shocks, fires, and explosions.

Q69. Single phase & three phase line what difference?

Ans.

Single phase and three phase lines differ in the number of conductors and voltage supply.

  • Single phase lines have two conductors, while three phase lines have three conductors.

  • Single phase lines are commonly used in residential applications, while three phase lines are used in industrial and commercial settings.

  • Single phase lines provide a voltage supply of 120V or 240V, while three phase lines provide a voltage supply of 208V, 240V, or 480V.

  • Three phase lines are more efficien...read more

Q70. What is the meaning of between kva and kwh

Ans.

kVA and kWh are both units of measurement used in the field of electricity, but they represent different concepts.

  • kVA stands for kilovolt-ampere and is a unit used to measure apparent power in an electrical circuit.

  • kWh stands for kilowatt-hour and is a unit used to measure energy consumption or usage over a period of time.

  • kVA represents the total power in a circuit, including both real power (kW) and reactive power (kVAR).

  • kWh represents the actual energy consumed by an electr...read more

Q71. How is star delta motor power and control wiring diagram

Ans.

Star delta motor power and control wiring diagram involves connecting the motor in star configuration for starting and then switching to delta configuration for running.

  • Start by connecting the motor windings in star configuration for starting to reduce the starting current.

  • Use a star delta starter to automatically switch the motor windings from star to delta configuration once the motor reaches a certain speed.

  • Ensure proper labeling of wires and connections to avoid any confu...read more

Q72. how to calculate KVARH and KVA?

Ans.

KVARH and KVA can be calculated using different formulas based on the type of circuit and load.

  • For single-phase circuits, KVA = voltage x current x power factor

  • For three-phase circuits, KVA = voltage x current x 1.732 x power factor

  • KVARH is calculated by integrating the reactive power over time

  • KVARH = (KVAR x hours of operation) / 1000

  • KVAR can be calculated using the Pythagorean theorem: KVAR = sqrt(KVA^2 - KW^2)

Q73. Own house or not or rent house and how much rent

Ans.

I currently rent a house for $X per month.

  • I rent a house instead of owning one.

  • My monthly rent is $X.

  • I prefer renting for now due to personal reasons.

Q74. Candidate behaviour in last company in their sinor

Ans.

Candidate demonstrated strong leadership skills and problem-solving abilities in their senior role at the last company.

  • Candidate successfully led a team of electricians to complete projects on time and within budget

  • Candidate implemented new safety protocols that reduced workplace accidents by 20%

  • Candidate resolved complex electrical issues quickly and efficiently to minimize downtime

  • Candidate received recognition from senior management for their exceptional performance

Q75. What is Mitsubishi plc fx series input output

Ans.

Mitsubishi PLC FX series input output refers to the range of input and output modules compatible with the FX series programmable logic controllers.

  • The FX series PLCs are compact and cost-effective controllers used for automation and control systems.

  • Input modules are used to receive signals from sensors and switches, while output modules are used to control actuators and devices.

  • The FX series IO modules come in various configurations such as digital inputs, digital outputs, an...read more

Q76. What is ohm s law what is transformer capacity

Ans.

Ohm's Law is a fundamental principle in electrical engineering that relates voltage, current, and resistance. Transformer capacity refers to the maximum power output of a transformer.

  • Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor.

  • The equation for Ohm's Law is I = V/R, where I is the current in amperes, V is the voltage in volts, and R is the r...read more

Q77. Control root curcit read show current time

Ans.

The question is unclear and does not make sense.

  • The question needs to be rephrased or clarified.

  • It is unclear what is being asked.

  • More information is needed to provide an answer.

Q78. For what purpose chopper ckt are used.

Ans.

Chopper circuits are used to convert a fixed DC voltage to a variable DC voltage.

  • Chopper circuits are also known as DC-DC converters.

  • They are used in applications such as battery charging, motor control, and renewable energy systems.

  • Chopper circuits use high-frequency switching to control the output voltage.

  • Examples of chopper circuits include buck converters, boost converters, and buck-boost converters.

Q79. which device is very sensational in low voltage protective system?

Ans.

The device that is very sensational in low voltage protective system is a Ground Fault Circuit Interrupter (GFCI).

  • Ground Fault Circuit Interrupter (GFCI) is a device that quickly breaks an electrical circuit to prevent serious harm from an ongoing electric shock.

  • GFCIs are commonly used in areas where water and electricity may come into contact, such as bathrooms, kitchens, and outdoor outlets.

  • They work by constantly monitoring the flow of electricity in a circuit and quickly ...read more

Q80. Do you have experience with testing transformers?

Ans.

Yes, I have experience testing transformers in various settings.

  • I have experience testing transformers in industrial settings to ensure proper functioning.

  • I am familiar with using multimeters and other testing equipment to check for voltage, current, and resistance.

  • I have tested transformers for efficiency and performance, identifying any issues and making necessary repairs.

  • I have also conducted routine maintenance checks on transformers to prevent breakdowns and ensure safet...read more

Q81. How to connect HV battery to electric bus

Ans.

To connect HV battery to electric bus, follow safety protocols, identify positive and negative terminals, use appropriate cables and connectors, and ensure proper insulation.

  • Ensure safety protocols are followed to prevent electric shock or short circuits

  • Identify positive and negative terminals on both the HV battery and electric bus

  • Use appropriate cables and connectors rated for high voltage

  • Ensure proper insulation to prevent any electrical hazards

  • Follow manufacturer's guidel...read more

Q82. What is the working principle of DG set?

Ans.

DG set works on the principle of converting mechanical energy into electrical energy using a diesel engine.

  • DG set stands for Diesel Generator set.

  • Diesel engine burns diesel fuel to produce mechanical energy.

  • The mechanical energy is then converted into electrical energy by the alternator.

  • The alternator consists of a rotor and a stator which generate electricity through electromagnetic induction.

Q83. What is circuit breaker and its types?

Ans.

A circuit breaker is an electrical switch that automatically interrupts the flow of current in a circuit when it becomes overloaded or short-circuited.

  • Circuit breakers are used to protect electrical circuits from damage caused by excess current flow.

  • There are three types of circuit breakers: thermal, magnetic, and hybrid.

  • Thermal circuit breakers use a bimetallic strip that bends when it gets hot, tripping the breaker.

  • Magnetic circuit breakers use an electromagnet to trip the ...read more

Q84. Three pasha supply three waves farm volt220+220+220?

Ans.

The three-phase supply consists of three waves with a voltage of 220V each.

  • A three-phase supply consists of three separate voltage waves.

  • Each wave has a voltage of 220V.

  • The waves are typically denoted as phase A, phase B, and phase C.

  • The total voltage across the three phases is 660V (220V + 220V + 220V).

Q85. What is the MIG/MAG welding machine?

Ans.

MIG/MAG welding machine is a type of welding equipment that uses a consumable wire electrode to create an electric arc for welding.

  • MIG stands for Metal Inert Gas while MAG stands for Metal Active Gas.

  • The machine uses a shielding gas to protect the weld from atmospheric contamination.

  • It is commonly used in automotive and manufacturing industries.

  • MIG/MAG welding is known for its speed and versatility.

  • The machine can be used to weld a variety of metals including steel, aluminum,...read more

Q86. What is negative charge of Esp system electrode?

Ans.

The negative charge of an ESP system electrode helps in attracting and collecting particulate matter from flue gases.

  • Electrostatic Precipitators (ESPs) use negatively charged electrodes to ionize particles in the gas stream.

  • The negative charge creates an electric field that attracts positively charged particles, aiding in their collection.

  • For example, in power plants, ESPs remove ash and other pollutants from exhaust gases, improving air quality.

  • The efficiency of an ESP is in...read more

Q87. How to calculate the parday power consumption in our home

Ans.

To calculate the per day power consumption in your home, you need to consider the wattage of each appliance and the number of hours it is used.

  • Make a list of all the appliances in your home and their respective wattages

  • Determine the average number of hours each appliance is used per day

  • Multiply the wattage of each appliance by the number of hours it is used to get the daily consumption for that appliance

  • Add up the daily consumption for all appliances to get the total per day ...read more

Q88. What is the no and nc

Ans.

NO and NC are abbreviations used in electrical circuits to describe the state of a switch or relay.

  • NO stands for Normally Open, which means the switch or relay is open (off) in its normal state.

  • NC stands for Normally Closed, which means the switch or relay is closed (on) in its normal state.

  • NO and NC are commonly used in control circuits to indicate the position of a switch or the state of a relay.

  • For example, in a lighting circuit, a NO switch would be used to turn on the li...read more

Q89. What is given input voltage in machinery s

Ans.

The input voltage in machinery varies depending on the specific machinery and its requirements.

  • Input voltage in machinery can range from low voltages like 110V to high voltages like 480V or even higher.

  • Different machinery may have different voltage requirements based on their power consumption and design.

  • Some examples of input voltages in machinery include 220V for household appliances, 240V for industrial equipment, and 480V for large motors.

  • It is important for electricians ...read more

Q90. 6.1hp moror how much current required

Ans.

The current required by a 6.1hp motor depends on the voltage it operates on.

  • The current required by the motor can be calculated using the formula: Current (A) = Power (W) / Voltage (V)

  • Assuming the motor operates on 220V, the current required would be around 27.7A

  • However, if the motor operates on a different voltage, the current required would be different

  • Factors like the motor's efficiency and power factor can also affect the current required

Q91. How many type wire use in wiring

Ans.

There are several types of wire used in wiring, including copper wire, aluminum wire, and coaxial cable.

  • Copper wire is commonly used for electrical wiring due to its high conductivity.

  • Aluminum wire is used in some applications, but it is less common than copper wire.

  • Coaxial cable is used for transmitting high-frequency signals, such as in cable television or internet connections.

Q92. What is 2 way switch

Ans.

A 2-way switch is a type of electrical switch that allows control of a single light or electrical device from two different locations.

  • A 2-way switch is commonly used in staircases, hallways, and rooms with multiple entrances.

  • It has three terminals: a common terminal and two traveler terminals.

  • The common terminal is connected to the power source, while the traveler terminals are connected to the light or device.

  • When one switch is turned on, it connects the common terminal to o...read more

Q93. Defference between induction motor and servo motor ?

Ans.

Induction motors are simpler and cheaper, while servo motors are more precise and expensive.

  • Induction motors work on electromagnetic induction, while servo motors use feedback control.

  • Induction motors are used in applications where speed control is not critical, while servo motors are used in precision applications.

  • Induction motors are less efficient than servo motors.

  • Examples of induction motors include ceiling fans and washing machines, while examples of servo motors includ...read more

Q94. D.o.l starter full form.

Ans.

D.O.L starter stands for Direct-On-Line starter.

  • D.O.L starter is a type of motor starter used in electrical systems.

  • It is commonly used to start induction motors.

  • The full form of D.O.L is Direct-On-Line.

  • It is also known as a full voltage starter.

  • In a D.O.L starter, the motor is directly connected to the power supply without any intermediate devices.

  • It provides a simple and cost-effective method of motor starting.

  • D.O.L starters are typically used for smaller motors with low st...read more

Q95. DOL statar Power Diegram and control diagram

Ans.

DOL starter power diagram shows the power flow in a direct online starter while control diagram shows the control circuitry.

  • DOL starter power diagram illustrates the power flow from the supply to the motor through the starter.

  • Control diagram shows the control circuitry that controls the operation of the starter.

  • DOL starter power diagram consists of a contactor, overload relay, and power supply.

  • Control diagram consists of push buttons, relays, and timers.

  • DOL starter power diag...read more

Q96. What is the process of tan delta testing?

Ans.

Tan delta testing is a method used to measure the insulation quality of electrical equipment.

  • Tan delta testing involves applying a voltage to the equipment and measuring the current flowing through the insulation.

  • The test compares the phase angle between the voltage and current to determine the quality of the insulation.

  • A high tan delta value indicates poor insulation quality, while a low value indicates good insulation.

  • Tan delta testing is commonly used in high voltage equip...read more

Q97. What is role for technical support in electrical filed

Ans.

Technical support in the electrical field involves providing assistance and troubleshooting for electrical systems and equipment.

  • Providing guidance on installation, maintenance, and repair of electrical systems

  • Troubleshooting electrical issues and offering solutions

  • Assisting with the design and implementation of electrical projects

  • Offering advice on safety protocols and regulations

  • Providing training and support to other team members

Q98. How many types of transformer

Ans.

There are several types of transformers used in electrical systems.

  • Power transformers

  • Distribution transformers

  • Instrument transformers

  • Auto transformers

  • Isolation transformers

  • Step-up transformers

  • Step-down transformers

  • Three-phase transformers

  • Single-phase transformers

Q99. How to do maintenance of ACB?

Ans.

Maintenance of ACB involves regular cleaning, inspection, and testing to ensure proper functioning.

  • Clean the ACB regularly to remove dust and debris.

  • Inspect the ACB for any signs of damage or wear.

  • Test the ACB's electrical connections and components for proper functioning.

  • Check the ACB's insulation resistance regularly.

  • Ensure that the ACB's operating mechanisms are lubricated.

  • Verify the ACB's trip settings and adjust if necessary.

  • Keep a record of maintenance activities and sc...read more

Q100. What is involved in electrical maintenance?

Ans.

Electrical maintenance involves regular inspections, repairs, and upgrades to ensure safe and efficient electrical systems.

  • Routine inspections to identify wear and tear, such as checking circuit breakers and wiring.

  • Testing and replacing faulty components, like light fixtures or outlets.

  • Upgrading systems to meet current codes, for example, installing GFCI outlets in wet areas.

  • Performing preventive maintenance to avoid future issues, such as cleaning electrical panels.

  • Documenti...read more

Previous
1
2
3
4
5
6
7
Next
Interview Tips & Stories
Ace your next interview with expert advice and inspiring stories

Interview experiences of popular companies

4.2
 • 1k Interviews
4.1
 • 822 Interviews
4.2
 • 432 Interviews
3.4
 • 134 Interviews
3.7
 • 34 Interviews
4.0
 • 9 Interviews
View all

Calculate your in-hand salary

Confused about how your in-hand salary is calculated? Enter your annual salary (CTC) and get your in-hand salary

Recently Viewed
SALARIES
Housejoy
SALARIES
Aptiv
JOBS
MOURI Tech
No Jobs
SALARIES
Housejoy
DESIGNATION
SALARIES
Housejoy
SALARIES
Housejoy
LIST OF COMPANIES
Housejoy
Overview
SALARIES
InMobi
COMPANY BENEFITS
Aptiv
No Benefits
Electrician Interview Questions
Share an Interview
Stay ahead in your career. Get AmbitionBox app
qr-code
Helping over 1 Crore job seekers every month in choosing their right fit company
65 L+

Reviews

4 L+

Interviews

4 Cr+

Salaries

1 Cr+

Users/Month

Contribute to help millions

Made with ❤️ in India. Trademarks belong to their respective owners. All rights reserved © 2024 Info Edge (India) Ltd.

Follow us
  • Youtube
  • Instagram
  • LinkedIn
  • Facebook
  • Twitter