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NTPC Interview Questions and Answers

Updated 16 Jun 2025
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203 Interview questions

🔥 Asked by recruiter 3 times
A Diploma Electrical Engineer was asked 4w ago
Q. What is a transformer?
Ans. 

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

  • Transformers are used to increase (step-up) or decrease (step-down) voltage levels.

  • Commonly found in power distribution systems to manage voltage levels.

  • Example: A step-down transformer reduces high voltage from power lines to a safer level for homes.

  • They consist of primary and secondary coils ...

View all Diploma Electrical Engineer interview questions
A Diploma Electrical Engineer was asked 4w ago
Q. What are the functions of a motor?
Ans. 

A motor is a device that converts electrical energy into mechanical energy to perform work.

  • Types of motors include AC motors, DC motors, and stepper motors.

  • AC motors are commonly used in household appliances like fans and refrigerators.

  • DC motors are often found in toys and small gadgets due to their simplicity.

  • Stepper motors are used in precision applications like 3D printers and CNC machines.

  • Motors operate based ...

View all Diploma Electrical Engineer interview questions
A Diploma Electrical Engineer was asked 4w ago
Q. What is a relay?
Ans. 

A relay is an electromechanical switch that opens or closes circuits based on an electrical signal.

  • Relays are used to control high voltage devices with low voltage signals.

  • Common applications include automotive systems, home appliances, and industrial machinery.

  • A typical relay consists of an electromagnet, armature, and contacts.

  • For example, a relay can turn on a motor when a button is pressed.

  • Relays can be found ...

View all Diploma Electrical Engineer interview questions
An Assistant Manager Maintenance was asked 3mo ago
Q. What would you do if someone criticizes you?
Ans. 

Handling criticism involves active listening, self-reflection, and constructive response to foster improvement and collaboration.

  • Listen actively to understand the criticism without interrupting.

  • Reflect on the feedback to identify any valid points for personal or professional growth.

  • Respond constructively by acknowledging the feedback and discussing potential solutions.

  • Seek clarification if the criticism is vague o...

View all Assistant Manager Maintenance interview questions
A Diploma Trainee Engineer was asked 5mo ago
Q. What is the difference between a high voltage transmission line and a low voltage transmission line?
Ans. 

High voltage transmission lines carry electricity over long distances with minimal energy loss, while low voltage transmission lines distribute electricity to homes and businesses.

  • High voltage transmission lines operate at voltages above 69 kV, while low voltage transmission lines operate at voltages below 69 kV.

  • High voltage transmission lines are used for long-distance power transmission, while low voltage transm...

View all Diploma Trainee Engineer interview questions
A Diploma Trainee Engineer was asked 5mo ago
Q. How does a thermal power plant work?
Ans. 

A thermal power plant generates electricity by converting heat energy into electrical energy.

  • Fuel (such as coal, natural gas, or oil) is burned to produce heat

  • The heat is used to boil water and produce steam

  • The steam drives a turbine connected to a generator, which produces electricity

  • The electricity is then transmitted through power lines to homes and businesses

View all Diploma Trainee Engineer interview questions
A Site Supervisor was asked 6mo ago
Q. How much experience do you have?
Ans. 

I have over 5 years of experience as a Site Supervisor, managing diverse teams and ensuring project completion on time and within budget.

  • Managed a team of 20 workers on a commercial construction site, ensuring safety protocols were followed.

  • Successfully completed a residential project 2 weeks ahead of schedule by optimizing workflow.

  • Conducted regular site inspections to ensure compliance with building codes and re...

View all Site Supervisor interview questions
Are these interview questions helpful?
A Leading Fireman was asked 6mo ago
Q. What are the different types of heat exchangers?
Ans. 

Heat exchangers are devices used to transfer heat between two or more fluids, without mixing them together.

  • Shell and tube heat exchanger

  • Plate heat exchanger

  • Double pipe heat exchanger

  • Finned tube heat exchanger

  • Spiral heat exchanger

View all Leading Fireman interview questions
A Leading Fireman was asked 6mo ago
Q. What are the different types of hoses used in firefighting?
Ans. 

Different types of hoses used in firefighting include attack hoses, supply hoses, and booster hoses.

  • Attack hoses are used to deliver water or foam to extinguish fires.

  • Supply hoses are used to bring water from a water source to the fire scene.

  • Booster hoses are smaller in diameter and used for small fires or for mop-up operations.

View all Leading Fireman interview questions
A Leading Fireman was asked 6mo ago
Q. What are the different types of couplings?
Ans. 

Different types of couplings include rigid, flexible, sleeve, and clamp couplings.

  • Rigid couplings do not allow for any misalignment between shafts

  • Flexible couplings can accommodate slight misalignments and vibrations

  • Sleeve couplings are simple and inexpensive, but not suitable for high torque applications

  • Clamp couplings use screws or clamps to secure the connection between shafts

View all Leading Fireman interview questions

NTPC Interview Experiences

166 interviews found

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via LinkedIn

Round 1 - Aptitude Test 

My aptitude test should be taken from Math Science.

Round 2 - Technical 

(4 Questions)

  • Q1. Electrical engineering
  • Q2. What is a transformer?
  • Ans. 

    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 voltage levels in electrical circuits.

    • They consist of two or more coils of wire wrapped around a core made of ferromagnetic material.

    • Examples of transformers include power transformers used in electrical substations and distribution transform...

  • Answered by AI
  • Q3. How does a thermal power plant work ?
  • Ans. 

    A thermal power plant generates electricity by converting heat energy into electrical energy.

    • Fuel (such as coal, natural gas, or oil) is burned to produce heat

    • The heat is used to boil water and produce steam

    • The steam drives a turbine connected to a generator, which produces electricity

    • The electricity is then transmitted through power lines to homes and businesses

  • Answered by AI
  • Q4. What is the difference between high voltage transmission line and low voltage transmission line?
  • Ans. 

    High voltage transmission lines carry electricity over long distances with minimal energy loss, while low voltage transmission lines distribute electricity to homes and businesses.

    • High voltage transmission lines operate at voltages above 69 kV, while low voltage transmission lines operate at voltages below 69 kV.

    • High voltage transmission lines are used for long-distance power transmission, while low voltage transmissio...

  • Answered by AI
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in May 2025, where I was asked the following questions.

  • Q1. Driscrib your Final year project.
  • Q2. Working principle of Machine and Transformar? Relay and Circuit breakers function and different.
  • Ans. 

    Machines convert energy, transformers change voltage levels, relays control circuits, and circuit breakers protect against overloads.

    • Machines operate on mechanical principles, converting energy from one form to another (e.g., electric motor).

    • Transformers use electromagnetic induction to change voltage levels in AC circuits (e.g., step-up and step-down transformers).

    • Relays are electrically operated switches that control...

  • Answered by AI
  • Q3. Asking about my previous company experience which I joined jast for two months, and left because of NTPC.🥲

Interview Preparation Tips

Interview preparation tips for other job seekers - Please if any one got a permanent job in any private company, whatever salary it is, please don't leave for gateing a chance from govt sector just for one year training. It a wast of time. If they give a job after training then it's ok.
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Company Website and was interviewed in Dec 2024. There were 2 interview rounds.

Round 1 - Aptitude Test 

The first round included reasoning ability, verbal ability, and aptitude tests.

Round 2 - HR 

(2 Questions)

  • Q1. What is your basic introduction, and what are your thoughts on computer networking questions?
  • Q2. What are Computer networks protocols. and server hardware questions

Interview Preparation Tips

Topics to prepare for NTPC Server Administrator interview:
  • Computer Networking
Interview preparation tips for other job seekers - I advise job seekers to prepare for HR questions as well as questions related to core subjects.
Interview experience
3
Average
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed in Aug 2024. There were 4 interview rounds.

Round 1 - Aptitude Test 

Aptitude test its very nice test for job test class test

Round 2 - Aptitude Test 

Aptitude test its nice attitude test job test class test work test

Round 3 - Assignment 

Assignment test is the one topic and only one subject assignment test

Round 4 - Technical 

(3 Questions)

  • Q1. NTPC company have a water
  • Q2. Material coal chamber
  • Q3. Water cycle water supply

Interview Preparation Tips

Interview preparation tips for other job seekers - Job have a company ist traning experience and benefits for company
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
Selected Selected

I applied via Company Website

Round 1 - Technical 

(4 Questions)

  • Q1. Power plant related
  • Q2. Theory of machine
  • Ans. 

    Theory of machine is a branch of engineering that deals with the study of machines and their mechanisms.

    • Theory of machine focuses on understanding the principles behind the operation of machines.

    • It involves studying the design, construction, and operation of machines.

    • Examples include studying the movement of gears in a gearbox or the operation of a piston in an engine.

  • Answered by AI
  • Q3. Function of PA fan
  • Ans. 

    PA fan stands for Primary Air fan, which is used in power plants to supply air for combustion in the boiler.

    • Supplies primary air for combustion in the boiler

    • Helps in maintaining proper air-fuel ratio for efficient combustion

    • Assists in controlling the temperature and pressure inside the boiler

    • Improves the overall efficiency of the boiler

    • Examples: FD fan in a power plant

  • Answered by AI
  • Q4. ID fan and pa fan difference
  • Ans. 

    ID fan is used to control the draft in the furnace while PA fan is used to supply combustion air to the furnace.

    • ID fan is located at the outlet of the furnace while PA fan is located at the inlet of the furnace.

    • ID fan helps in maintaining negative pressure inside the furnace while PA fan helps in supplying air for combustion.

    • ID fan is used to extract flue gases from the furnace while PA fan is used to supply primary an...

  • Answered by AI

Manager Interview Questions & Answers

user image Anonymous

posted on 16 Jun 2025

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I appeared for an interview in May 2025, where I was asked the following questions.

  • Q1. What are your reasons for wanting to work for this company?
  • Ans. 

    I admire this company's commitment to innovation and its strong values, which align with my professional goals and personal beliefs.

    • The company's reputation for innovation in the industry, such as its recent product launch that revolutionized patient care.

    • Alignment with the company's core values, particularly its focus on sustainability and community engagement, which resonates with my personal beliefs.

    • Opportunities fo...

  • Answered by AI
  • Q2. How do you believe you would fit into our company?
  • Ans. 

    I believe my skills and values align well with your company's mission and culture, fostering collaboration and innovation.

    • Strong alignment with company values: I resonate with your commitment to integrity and excellence, as demonstrated in my previous role where I led a team to achieve a 20% increase in customer satisfaction.

    • Proven leadership experience: In my last position, I managed a diverse team, promoting a cultur...

  • Answered by AI

Leading Fireman Interview Questions & Answers

user image HAIVAN GAMING

posted on 8 Dec 2024

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(5 Questions)

  • Q1. How many types of exchangers are there?
  • Ans. 

    Heat exchangers are devices used to transfer heat between two or more fluids, without mixing them together.

    • Shell and tube heat exchanger

    • Plate heat exchanger

    • Double pipe heat exchanger

    • Finned tube heat exchanger

    • Spiral heat exchanger

  • Answered by AI
  • Q2. What is preeming called?
  • Ans. 

    Preeming is called grooming in the fire service.

    • Preeming is the act of cleaning and maintaining equipment in the fire service.

    • Grooming ensures that all equipment is in proper working order and ready for use during emergencies.

    • Examples of grooming tasks include cleaning and inspecting hoses, nozzles, and other firefighting gear.

  • Answered by AI
  • Q3. How many types of hydrants are there?
  • Ans. 

    Different types of hydrants include wet barrel hydrants, dry barrel hydrants, and post hydrants.

    • Wet barrel hydrants are commonly used in warmer climates and have the valve at the top of the hydrant.

    • Dry barrel hydrants are typically used in colder climates and have the valve at the bottom of the hydrant to prevent freezing.

    • Post hydrants are mounted on a post above ground level and are often used in rural areas or parks.

  • Answered by AI
  • Q4. How many types of couplings are there?
  • Ans. 

    Different types of couplings include rigid, flexible, sleeve, and clamp couplings.

    • Rigid couplings do not allow for any misalignment between shafts

    • Flexible couplings can accommodate slight misalignments and vibrations

    • Sleeve couplings are simple and inexpensive, but not suitable for high torque applications

    • Clamp couplings use screws or clamps to secure the connection between shafts

  • Answered by AI
  • Q5. How many types of hose are there?
  • Ans. 

    Different types of hoses used in firefighting include attack hoses, supply hoses, and booster hoses.

    • Attack hoses are used to deliver water or foam to extinguish fires.

    • Supply hoses are used to bring water from a water source to the fire scene.

    • Booster hoses are smaller in diameter and used for small fires or for mop-up operations.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Have complete information about fire
Interview experience
4
Good
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Selected Selected

I appeared for an interview in Apr 2025, where I was asked the following questions.

  • Q1. Power generation and Transformers
  • Q2. Plant basic information
  • Q3. Circuit breakers
  • Q4. Electrical wiring
  • Q5. Electrical repairs
  • Q6. Basic electrical
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in Apr 2025, where I was asked the following questions.

  • Q1. What is ac
  • Ans. 

    AC, or alternating current, is an electric current that reverses direction periodically, commonly used in power systems.

    • AC voltage varies sinusoidally over time, typically represented as a sine wave.

    • Commonly used in household power supply, e.g., 120V or 240V AC.

    • AC is more efficient for long-distance power transmission compared to DC.

    • Transformers can easily step up or step down AC voltage levels.

    • Examples of AC sources i...

  • Answered by AI
  • Q2. What are doing motor
  • Ans. 

    A motor is a device that converts electrical energy into mechanical energy to perform work.

    • Types of motors include AC motors, DC motors, and stepper motors.

    • AC motors are commonly used in household appliances like fans and refrigerators.

    • DC motors are often found in toys and small gadgets due to their simplicity.

    • Stepper motors are used in precision applications like 3D printers and CNC machines.

    • Motors operate based on el...

  • Answered by AI
  • Q3. What is relay
  • Ans. 

    A relay is an electromechanical switch that opens or closes circuits based on an electrical signal.

    • Relays are used to control high voltage devices with low voltage signals.

    • Common applications include automotive systems, home appliances, and industrial machinery.

    • A typical relay consists of an electromagnet, armature, and contacts.

    • For example, a relay can turn on a motor when a button is pressed.

    • Relays can be found in sa...

  • Answered by AI
  • Q4. What is transfarmer
  • Ans. 

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

    • Transformers are used to increase (step-up) or decrease (step-down) voltage levels.

    • Commonly found in power distribution systems to manage voltage levels.

    • Example: A step-down transformer reduces high voltage from power lines to a safer level for homes.

    • They consist of primary and secondary coils wound...

  • Answered by AI
  • Q5. What is Switch gears
  • Ans. 

    Switchgear refers to electrical devices that control, protect, and isolate electrical equipment in power systems.

    • Switchgear includes circuit breakers, fuses, and disconnect switches.

    • It is used in substations, industrial plants, and commercial buildings.

    • Examples include air-insulated switchgear (AIS) and gas-insulated switchgear (GIS).

    • Switchgear ensures safety by interrupting fault currents and isolating faulty equipmen...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Growth is company

Store Manager Interview Questions & Answers

user image Anonymous

posted on 20 Mar 2024

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Naukri.com and was interviewed in Jun 2024. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. About store management
  • Q2. Any thing about store management
  • Ans. 

    Store management involves overseeing daily operations, staff management, inventory control, and customer service.

    • Daily operations include opening and closing procedures, ensuring cleanliness and organization, and monitoring sales.

    • Staff management involves hiring, training, scheduling, and performance evaluations.

    • Inventory control includes ordering products, managing stock levels, and conducting regular audits.

    • Customer ...

  • Answered by AI
  • Q3. I am one of those who work with great confidence, and I am proud that my presentation will not cause any harm to the company.

Interview Preparation Tips

Interview preparation tips for other job seekers - I would only say this to the job seekers, work hard and play your important role in your objective and company's responsibility. I promise you that success will touch your feet.

Top trending discussions

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Interview Tips & Stories
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works at
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Can speak English, can’t deliver in interviews
I feel like I can't speak fluently during interviews. I do know english well and use it daily to communicate, but the moment I'm in an interview, I just get stuck. since it's not my first language, I struggle to express what I actually feel. I know the answer in my head, but I just can’t deliver it properly at that moment. Please guide me
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NTPC Interview FAQs

How many rounds are there in NTPC interview?
NTPC interview process usually has 1-2 rounds. The most common rounds in the NTPC interview process are Technical, Resume Shortlist and Aptitude Test.
What are the top questions asked in NTPC interview?

Some of the top questions asked at the NTPC interview -

  1. Which is the extensively used motor in general?(in general it is I...read more
  2. Your maximum capacity to lift a weight may be 50kgs.If you were asked to lift a...read more
  3. If you are asked to construct a dam in Mizoram, what will be the problems you a...read more
What are the most common questions asked in NTPC HR round?

The most common HR questions asked in NTPC interview are -

  1. Where do you see yourself in 5 yea...read more
  2. What are your salary expectatio...read more
  3. What are your strengths and weakness...read more
How long is the NTPC interview process?

The duration of NTPC interview process can vary, but typically it takes about less than 2 weeks to complete.

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Overall Interview Experience Rating

4.3/5

based on 131 interview experiences

Difficulty level

Easy 33%
Moderate 55%
Hard 13%

Duration

Less than 2 weeks 67%
2-4 weeks 11%
4-6 weeks 2%
6-8 weeks 7%
More than 8 weeks 13%
View more

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NTPC Reviews and Ratings

based on 1.6k reviews

4.2/5

Rating in categories

4.1

Skill development

4.0

Work-life balance

4.0

Salary

4.0

Job security

4.1

Company culture

3.5

Promotions

4.0

Work satisfaction

Explore 1.6k Reviews and Ratings
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