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NTPC Interview Questions, Process, and Tips
Top NTPC Interview Questions and Answers
- Q1. If you are asked to construct a dam in Mizoram, what will be the problems you are expected to face and what all logistics will you be looking out for?asked in Executive Trainee interview
- Q2. How many types of exchangers are there?asked in Leading Fireman interview
- Q3. Why and which type of transformer do we use to reduce power loss during transmission?asked in Trainee interview
NTPC Interview Experiences
158 interviews found
Anonymous
Interview Questionnaire
12 Questions
- Q1. Which is the extensively used motor in general?(in general it is I.M)
- Ans.
The extensively used motor in general is the induction motor (I.M).
Induction motors are widely used in various applications due to their simplicity, reliability, and low cost.
They are used in industries for driving pumps, compressors, conveyors, and other machinery.
They are also used in household appliances such as washing machines, refrigerators, and air conditioners.
Induction motors are preferred over other types of ...
- Q2. Draw the speed torque characteristics of I.M
- Ans.
The speed torque characteristics of I.M can be represented by a graph showing the relationship between speed and torque.
The graph shows that as the torque increases, the speed decreases.
The maximum torque occurs at zero speed, which is known as the stall torque.
The maximum speed occurs at zero torque, which is known as the no-load speed.
The slope of the curve represents the motor's torque capability.
The shape of the cu...
- Q3. Define slip,synchronous speed and how does sync speed depends on no of poles?
- Ans.
Slip is the difference between synchronous and rotor speed. Sync speed depends on no of poles.
Slip is the difference between synchronous speed and rotor speed in an AC motor.
Synchronous speed is the speed of the rotating magnetic field in the stator of the motor.
Sync speed depends on the number of poles in the motor.
The formula for synchronous speed is (120 x frequency) / number of poles.
For example, a 4-pole motor ope...
- Q4. What happens to speed of I.M if load is increased?
- Ans.
The speed of I.M decreases if load is increased.
Increased load leads to increased resistance, which slows down the speed of I.M.
The motor may also overheat and slow down due to increased load.
Examples include a drill slowing down when drilling through a harder material or a fan slowing down when obstructed.
- Q5. Why should not be the slip not zero in I.M?(finally asked me entire working principle of I.M)
- Q6. What are the protections used for a generator?
- Ans.
Generators are protected by various measures to ensure safety and prevent damage.
Circuit breakers to prevent overloading
Ground fault circuit interrupters to prevent electrocution
Automatic shut-off switches for low oil pressure or high temperature
Enclosures to protect from weather and tampering
Surge protectors to prevent damage from power surges
- Q7. Why the protection of generator should be used given that drawing of power from bus bar is allowed
- Ans.
Protection of generator is necessary to prevent damage and ensure safe operation.
Generator protection prevents damage to the generator and other equipment in the system.
It ensures safe operation by detecting faults and tripping the generator before damage occurs.
Drawing power from the bus bar does not guarantee protection against faults in the generator.
Examples of generator protection include overcurrent protection, d...
- Q8. What is U.P.S?Where is it used?
- Ans.
UPS stands for United Parcel Service. It is a package delivery company used for shipping and logistics worldwide.
UPS is a global package delivery and logistics company.
It was founded in 1907 in Seattle, Washington.
UPS delivers over 20 million packages and documents daily.
It offers a range of services including air, ground, and freight shipping.
UPS is used by individuals and businesses for shipping and logistics needs.
- Q9. Do you know about 'variable frequency drives' ?
- Ans.
Variable frequency drives are electronic devices used to control the speed of electric motors.
They are also known as VFDs or inverters.
They can save energy by adjusting the motor speed to match the load.
They are commonly used in HVAC systems, pumps, and conveyor belts.
They can improve motor performance and reduce wear and tear.
They can be programmed to provide specific motor control functions.
- Q10. What are the various precautions to be taken to connecting transformers in parallel?
- Ans.
Precautions for connecting transformers in parallel
Ensure that the transformers have the same voltage ratio and phase sequence
Use transformers with similar impedance values
Install a synchronizing device to ensure that the transformers are in phase
Provide separate circuit breakers for each transformer
Ensure that the transformers have similar temperature rise characteristics
Use transformers with the same vector group
Ensu...
- Q11. My family background
- Q12. My schooling
Interview Preparation Tips
Experience: First of all they asked me what are all the subjects in which I am perfect.I said them all related to Power Systems.One of the interviewer asked me if I had touch with Power Electronics.I said I had idea,then he asked me about
applications of thyristor and why is it used.Questions asked were: Which is the extensively used motor in general?(in general it is I.M) .Draw the speed torque characteristics of I.M.Define slip,synchronous speed and how does sync speed depends on no of poles?What happens to speed of I.M if load is increased?Why should not be the slip not zero in I.M?(finally asked me entire working principle of I.M).[This is where I impressed him that he said me very good] What are the protections used for a generator?(I listed all the ones i have studied.While i was saying about relay for protection for failure of prime mover of generator ,the interviewer asked me why the protection of generator should be used given that drawing of power from bus bar is allowed,I was little struck here but to my luck the other interviewer interrupted and asked me following questions ]How do you determine direction of rotation of motor using hands?(F.L.H AND F.R.H). What is U.P.S?where is it used?(uninterrupted power supply) Do you know about 'variable frequency drives' ..(actually this from subject which we were taught in 4-1 and still not taught,I said the same to them) What are the various precautions to be taken to connecting transformers in parallel?
Round: HR Interview
Experience: The interview for eee guys was scheduled on 27th.I had to wait all the first day for my turn..but i was informed that my interview was on next day...even i waited for my friends interview and asked how were the interviewers and what all questions they were asking..My friends told me that they were asked simple questions regarding basics..So, i felt comfortable and slept...I am the 2nd person to be interviewed on the second day..while the first guy was sent inside i was made to sit alone..So, i was little tensed sitting alone..After 15 minutes i was called for the interview ..there were 7 people siting in the panel with the chairman at the center...Starting from the first question i answered the questions with confidence with a supporting reason for my answer...This was why i impressed the panel(explanation of principle of I.M). The thing i need to stress you guys is that i was the 2nd from the last in general category shortlisted...So,i say i say that even you don't have cgpa your selection can be influenced by your performance in interview..Of course having cgpa doesn't hurt..it plays am important role in PSUs.. I was interviewed only for 10 minutes..but everyone was interviewed for minimum of 15-20 minutes..So the duration of interview has nothing to do for your selection...
General Tips: First thing when you are for the interview you should know of yourself..The most general question in any interview is "tell me about yourself"... Be strong with your basics...Most probably you may be asked for favorite subject.So, you need to be it careful while picking up your subject...The thing is you need not answer all the questions but your answers should not mess up with basics...Answer with confidence the questions you know and at the same time be sincere to say "i don't know" when you don't know the answer...Never try to bluff the panel...Rather you can answer in such a way that the interviewer moves to a topic in which you are familiar. If you have have any projects or IT..you should have thorough knowledge of them.Don't panic if you don't have any projects but if you have see that you are well prepared in that...(i did not have any project except IT) Be careful while answering HR questions..they may ask questions like "what would you do if we do not offer you job" It's better to say them that i would try through off campus ...that shows your loyalty.Do not disclose any of your B school plans or GRE plans even they ask for it.say them that you are interested in job and not in further studies...You can refer to net for many HR questions asked in interview... You should have knowledge of the company you are going to attend before hand.That helps you a lot.. For EEE guys you better read PSP and Power Systems thoroughly before going to interview One last thing is that the interviewer asks if you hava any questions..then try to ask some questions rather than saying no questions..ask some relevant questions.. K guys bye...all the best for your future career
College Name: NIT WARANGAL
Selected
I applied via LinkedIn
My aptitude test should be taken from Math Science.
(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...
- 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
- 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...
Diploma Trainee Engineer Interview Questions asked at other Companies
Selected
I applied via Company Website and was interviewed in Dec 2024. There were 2 interview rounds.
The first round included reasoning ability, verbal ability, and aptitude tests.
(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
- Computer Networking
Server Administrator Interview Questions asked at other Companies
Selected
I applied via Campus Placement and was interviewed in Aug 2024. There were 4 interview rounds.
Aptitude test its very nice test for job test class test
Aptitude test its nice attitude test job test class test work test
Assignment test is the one topic and only one subject assignment test
(3 Questions)
- Q1. NTPC company have a water
- Q2. Material coal chamber
- Q3. Water cycle water supply
Interview Preparation Tips
Junior Mechanical Engineer Interview Questions asked at other Companies
NTPC interview questions for popular designations
Selected
I applied via Company Website
(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.
- 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
- 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...
Apprenticeship Trainee Interview Questions asked at other Companies
Get interview-ready with Top NTPC Interview Questions
HAIVAN GAMING
(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
- 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.
- 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.
- 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
- 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.
Interview Preparation Tips
Leading Fireman Interview Questions asked at other Companies
I applied via Naukri.com and was interviewed in Jun 2024. There was 1 interview round.
(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 ...
- 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
Store Manager Interview Questions asked at other Companies
Selected
(8 Questions)
- Q1. Power plant system
- Q2. Power fector ,current,voltage related
- Q3. PowerX'mer,Generator,steam turbin
- Q4. Power transnission,,HVDC transmmision
- Q5. Role of safety man &machine
- Ans.
The safety man and machine play crucial roles in ensuring the safety of power plant operations.
The safety man is responsible for implementing safety protocols and procedures in the power plant.
They conduct regular safety inspections and audits to identify potential hazards and ensure compliance with safety regulations.
The safety man also trains and educates plant personnel on safety practices and emergency procedures.
T...
- Q6. Best precticed & addopt quality concept
- Q7. How can make own productive
- Ans.
To make oneself productive, one can prioritize tasks, set goals, manage time effectively, seek continuous learning, and maintain a healthy work-life balance.
Prioritize tasks based on importance and urgency
Set specific, measurable, attainable, relevant, and time-bound (SMART) goals
Manage time effectively by creating schedules and avoiding procrastination
Seek continuous learning through professional development and stayi...
- Q8. Custmer focus,sustaible product
Project report,monitering procces time to time make scedule preventive maintanance,safety first
Power Plant Engineer Interview Questions asked at other Companies
I applied via Campus Placement
Topic was Women in power sectors
(2 Questions)
- Q1. Give your brief intro
- Q2. What is thermal plant?
- Ans.
A thermal plant is a power station that generates electricity by converting heat energy into electrical energy.
Thermal plants use fuel such as coal, natural gas, or oil to heat water and produce steam.
The steam then drives a turbine connected to a generator, which produces electricity.
Examples of thermal plants include coal-fired power plants and gas-fired power plants.
Interview Preparation Tips
Summer Intern Interview Questions asked at other Companies
Prakash Suthar
(5 Questions)
- Q1. Why you join ntpc
- Q2. What are your background
- Q3. Education journey
- Q4. Technical skill and knowledge
- Q5. Management skill and experience
Interview Preparation Tips
Senior Assistant Engineer Interview Questions asked at other Companies
Selected
I was interviewed in Jul 2024.
About H2 plant operation
H2 plant operator safety
Plant Operator Interview Questions asked at other Companies
Top trending discussions
NTPC Interview FAQs
The duration of NTPC interview process can vary, but typically it takes about less than 2 weeks to complete.
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NTPC Interview Process
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