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Thermax Limited Interview Questions and Answers for Experienced

Updated 27 Jun 2025
Popular Designations

145 Interview questions

A Senior Design Engineer was asked 5mo ago
Q. What is the concept of projection?
Ans. 

Projection is the process of displaying a three-dimensional object onto a two-dimensional surface.

  • Projection involves transforming points from a higher-dimensional space to a lower-dimensional space.

  • Common types of projections include orthographic and perspective projections.

  • In engineering, projection is often used in computer-aided design (CAD) to create 2D drawings from 3D models.

View all Senior Design Engineer interview questions
A Senior Design Engineer was asked 5mo ago
Q. What are the uses of GD&T (Geometric Dimensioning and Tolerancing)?
Ans. 

GD&T is used to define the allowable variations in form, size, and orientation of parts in engineering drawings.

  • Ensures clear communication between designers, engineers, and manufacturers

  • Improves quality control by specifying tolerances for parts

  • Reduces manufacturing costs by minimizing scrap and rework

  • Helps optimize the design for functionality and manufacturability

  • Examples: using position tolerance to contro...

View all Senior Design Engineer interview questions
A Shift Incharge was asked 10mo ago
Q. Which chemical would you use to remove scale from a boiler?
Ans. 

Boiler scale can be treated using chemicals like phosphates, sulfamic acid, or citric acid to dissolve and prevent buildup.

  • Phosphates: Used to prevent scale formation by sequestering calcium and magnesium ions.

  • Sulfamic Acid: Effective for descaling and removing hard deposits from boiler surfaces.

  • Citric Acid: A biodegradable option that can dissolve scale and is less corrosive.

View all Shift Incharge interview questions
A Shift Incharge was asked 10mo ago
Q. What causes boiler scale buildup?
Ans. 

Boiler scale formation is caused by mineral deposits from water, leading to efficiency loss and potential damage.

  • Hard water contains high levels of calcium and magnesium, which precipitate and form scale.

  • Temperature increases in the boiler can accelerate scale formation, as seen in high-pressure systems.

  • Poor water treatment practices can lead to inadequate removal of scale-forming minerals.

  • Examples include calcium...

View all Shift Incharge interview questions
A Shift Incharge was asked 10mo ago
Q. What is the hardness level of boiler feed water?
Ans. 

Boiler feed water should ideally have low hardness to prevent scaling and corrosion, typically below 100 ppm.

  • Hardness in water is mainly due to calcium and magnesium ions.

  • High hardness can lead to scale formation on boiler tubes, reducing efficiency.

  • Feed water hardness should ideally be below 100 ppm for optimal boiler operation.

  • Water softening techniques, like ion exchange, are often used to reduce hardness.

  • For e...

View all Shift Incharge interview questions
A Shift Incharge was asked 10mo ago
Q. How do you charge a softener?
Ans. 

Softener charge involves adding the right amount of salt and water to regenerate the resin beads in a water softener system.

  • Check the salt level in the brine tank; it should be at least half full.

  • Add the appropriate type of salt (rock salt, solar salt, or evaporated salt) to the tank.

  • Ensure the water level in the brine tank is sufficient to dissolve the salt.

  • Run a regeneration cycle to allow the softener to rechar...

View all Shift Incharge interview questions
A Junior Engineer was asked 11mo ago
Q. What are AC and DC drives?
Ans. 

AC and DC drives are types of electrical drives used to control the speed and torque of electric motors.

  • AC drive controls the speed of an AC motor by varying the frequency of the electrical supply.

  • DC drive controls the speed of a DC motor by varying the voltage supplied to the motor.

  • AC drives are more commonly used in industrial applications due to their efficiency and flexibility.

  • DC drives are often used in appli...

View all Junior Engineer interview questions
Are these interview questions helpful?
A Junior Engineer was asked 11mo ago
Q. What is your understanding of 4-wire and 2-wire systems?
Ans. 

4 wire and 2 wire are configurations used in electrical circuits for measuring resistance.

  • 4 wire configuration is used for accurate resistance measurements by eliminating lead resistance

  • 2 wire configuration is simpler but less accurate due to lead resistance affecting measurements

  • Examples: 4 wire used in precision instruments like multimeters, 2 wire used in basic circuit testing

View all Junior Engineer interview questions
A Junior Engineer was asked 11mo ago
Q. What is the difference between RTD and thermocouple?
Ans. 

RTD measures temperature using resistance change, while thermocouple uses voltage change.

  • RTD stands for Resistance Temperature Detector, while thermocouple generates voltage based on temperature difference.

  • RTDs are more accurate and stable compared to thermocouples.

  • RTDs have higher initial cost but lower long-term maintenance cost.

  • Thermocouples are more rugged and can withstand higher temperatures than RTDs.

  • Exampl...

View all Junior Engineer interview questions
A Power Plant Manager was asked 11mo ago
Q. What is the DM water balance in a boiler?
Ans. 

DM water balance in a boiler ensures optimal operation and efficiency by managing water quality and quantity.

  • DM (Deionized) water is crucial for preventing scale formation in boilers.

  • Regular monitoring of water quality helps maintain optimal conductivity levels.

  • Blowdown is necessary to remove impurities and maintain water balance.

  • Example: A typical blowdown rate might be 5-10% of the feedwater flow.

  • Make-up water i...

View all Power Plant Manager interview questions

Thermax Limited Interview Experiences for Experienced

159 interviews found

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Have a job for me
  • Q2. Have job for me in this year
Round 2 - Technical 

(2 Questions)

  • Q1. What kind of for me
  • Q2. Where is your head office
  • Ans. 

    Our head office is located in downtown New York City.

    • Head office is in downtown New York City

    • Easily accessible by public transportation

    • Close to major landmarks and attractions

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview before Apr 2021.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. Boiler lightup, emergency activity, achivement,full job profile,introduction
  • Q2. Lightup processer Troubleshooting Emergency condition

Interview Preparation Tips

Interview preparation tips for other job seekers - A positive future-oriented culture and competitive salary.

Shift Incharge Interview Questions & Answers

user image Kunal Chhatthuprasad Chauhan

posted on 10 Feb 2025

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in Aug 2024.

Round 1 - Technical 

(2 Questions)

  • Q1. Boiler Related questions such as efficiency, Maintenance schedule, Chemicals used in boiler water and O&M
  • Q2. Compressor Maintenance and operation related. Parameters readings.
Round 2 - One-on-one 

(2 Questions)

  • Q1. Technical,Manpower Handling and safety rules.
  • Q2. Shift Scheduling, Report Making and sending to higher authorities.

Interview Preparation Tips

Interview preparation tips for other job seekers - Technical knowledge is must but lost probable what you have mentioned in your resume, you must know them very well.

Interview Questions & Answers

user image Anonymous

posted on 26 Aug 2024

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-

I applied via Referral

Round 1 - Technical 

(5 Questions)

  • Q1. Pupu pump rating 400 tan plant solvent
  • Q2. 4 ton & boiler Papu Pump rating
  • Q3. Boiler tube thickness kitni honi chahie new boiler
  • Q4. Boiler mein corrosion hone ka Karan
  • Q5. Boiler mein hardness jamne ka Karan

Interview Preparation Tips

Interview preparation tips for other job seekers - Good job my hobby hard work and mechanic work 15year Experience
Interview experience
5
Excellent
Difficulty level
-
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview in Jul 2024.

Round 1 - Technical 

(9 Questions)

  • Q1. PH booster ka code word bataiye
  • Ans. PH booster ka code word 3006
  • Answered by Nandbihari Merotha
  • Q2. Anti oxygen chemical ka code bataiye
  • Q3. Anti sclant ka code word bataiye
  • Q4. Boiler scale jamne ka Karan bataen
  • Ans. 

    Boiler scale formation is caused by mineral deposits from water, leading to efficiency loss and potential damage.

    • Hard water contains high levels of calcium and magnesium, which precipitate and form scale.

    • Temperature increases in the boiler can accelerate scale formation, as seen in high-pressure systems.

    • Poor water treatment practices can lead to inadequate removal of scale-forming minerals.

    • Examples include calcium carb...

  • Answered by AI
  • Q5. Boiler Patti ka temperature kitna hota hai
  • Q6. Softener charge kaise karte hain
  • Ans. 

    Softener charge involves adding the right amount of salt and water to regenerate the resin beads in a water softener system.

    • Check the salt level in the brine tank; it should be at least half full.

    • Add the appropriate type of salt (rock salt, solar salt, or evaporated salt) to the tank.

    • Ensure the water level in the brine tank is sufficient to dissolve the salt.

    • Run a regeneration cycle to allow the softener to recharge th...

  • Answered by AI
  • Q7. Boiler ka Feed Water kitne hardness ka hota hai
  • Ans. 

    Boiler feed water should ideally have low hardness to prevent scaling and corrosion, typically below 100 ppm.

    • Hardness in water is mainly due to calcium and magnesium ions.

    • High hardness can lead to scale formation on boiler tubes, reducing efficiency.

    • Feed water hardness should ideally be below 100 ppm for optimal boiler operation.

    • Water softening techniques, like ion exchange, are often used to reduce hardness.

    • For exampl...

  • Answered by AI
  • Q8. Sapna charge karne ka Tarika bataiye
  • Q9. Boiler mein scale hogi to kaun sa chemical use karenge
  • Ans. 

    Boiler scale can be treated using chemicals like phosphates, sulfamic acid, or citric acid to dissolve and prevent buildup.

    • Phosphates: Used to prevent scale formation by sequestering calcium and magnesium ions.

    • Sulfamic Acid: Effective for descaling and removing hard deposits from boiler surfaces.

    • Citric Acid: A biodegradable option that can dissolve scale and is less corrosive.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Very good performance my job very good my hard working s 5 maintain karna
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
More than 8 weeks
Result
Selected Selected
  • Q1. Give Through of your subject matter experties
  • Ans. 

    I specialize in health, safety, and environmental management, ensuring compliance and promoting a safe workplace culture.

    • Expert in developing and implementing HSE policies and procedures.

    • Conduct regular safety audits and risk assessments to identify hazards.

    • Provide training and workshops on safety protocols and emergency response.

    • Experience in incident investigation and reporting to prevent future occurrences.

    • Knowledge...

  • Answered by AI
  • Q2. Why u want to join the organisation
  • Ans. 

    I am drawn to this organization for its commitment to safety, innovation, and community impact in the HSE field.

    • The organization's strong reputation for prioritizing health and safety aligns with my professional values.

    • I admire your innovative approaches to HSE challenges, such as implementing cutting-edge safety technologies.

    • The opportunity to work with a diverse team of experts excites me, as collaboration fosters gr...

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(1 Question)

  • Q1. Tell me about yourself
Round 2 - One-on-one 

(1 Question)

  • Q1. Tell me briefly about your past experience
  • Ans. 

    Experienced Senior Design Engineer with a strong background in product development and project management across various industries.

    • Led a team in designing a medical device that improved patient monitoring efficiency by 30%.

    • Developed a new product line for a consumer electronics company, resulting in a 25% increase in market share.

    • Implemented design improvements that reduced manufacturing costs by 15% while maintaining...

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Total working of air compressors
  • Ans. 

    Air compressors work by compressing air to increase its pressure, which can then be used for various applications.

    • Air is drawn into the compressor through an intake valve

    • The air is then compressed using a piston or rotating impeller

    • Compressed air is stored in a tank for later use

    • The compressed air is released through a valve when needed for powering tools or equipment

    • Regular maintenance, such as changing filters and oi...

  • Answered by AI
  • Q2. About air dryers working
Round 2 - Technical 

(2 Questions)

  • Q1. Asked questions About pumps?
  • Q2. About Latent heat?
Round 3 - One-on-one 

(2 Questions)

  • Q1. Commissioning process?
  • Ans. 

    The commissioning process ensures systems are installed, tested, and operational according to specifications.

    • Define project scope and objectives clearly.

    • Develop a commissioning plan outlining roles and responsibilities.

    • Conduct pre-commissioning checks to ensure readiness.

    • Perform functional testing to verify system performance.

    • Document findings and address any deficiencies.

    • Provide training to end-users for effective ope...

  • Answered by AI
  • Q2. What sites attended?
  • Ans. 

    I have attended various sites for training and workshops related to after sales service.

    • Attended manufacturer's training site for product knowledge

    • Visited customer sites to understand their service needs

    • Participated in industry conferences and seminars

  • Answered by AI
Round 4 - HR 

(2 Questions)

  • Q1. Questions asked About goals
  • Q2. Relocation of places
  • Ans. 

    Relocation of places can be challenging but can also offer new opportunities and experiences.

    • Relocation can be stressful due to leaving familiar surroundings and support networks.

    • It can also be exciting to explore a new city or country and meet new people.

    • Consider the cost of living, job opportunities, and quality of life in the new location.

    • Research schools, healthcare facilities, and other amenities in the new area.

    • P...

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
-

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

  • Q1. Type of existing profile and working structure
  • Q2. Details on experience and calls, target, grid management
  • Q3. Mythology of working, planning, managing team
  • Q4. Types of clients, segregation industry wise
  • Q5. Their expectations and structure

Interview Questions & Answers

user image Anonymous

posted on 12 Jun 2025

Interview experience
1
Bad
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
No response

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

  • Q1. Why are you not joining your father's business? Question By HR
  • Q2. Why there is gap in career history!
  • Ans. 

    I took time off to focus on personal development and family commitments, which enriched my skills and perspective.

    • I took a sabbatical to pursue further education, enhancing my financial analysis skills.

    • During the gap, I volunteered with a non-profit organization, managing their finances and gaining practical experience.

    • I faced family health issues that required my attention, but I used this time to stay updated with in...

  • Answered by AI

Top trending discussions

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Interview Tips & Stories
2w
toobluntforu
·
works at
Cvent
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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Thermax Limited Interview FAQs

How many rounds are there in Thermax Limited interview for experienced candidates?
Thermax Limited interview process for experienced candidates usually has 2-3 rounds. The most common rounds in the Thermax Limited interview process for experienced candidates are Technical, Resume Shortlist and HR.
How to prepare for Thermax Limited interview for experienced candidates?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Thermax Limited. The most common topics and skills that interviewers at Thermax Limited expect are Boiler, Power Plant, AutoCAD, Boiler Operations and WTP.
What are the top questions asked in Thermax Limited interview for experienced candidates?

Some of the top questions asked at the Thermax Limited interview for experienced candidates -

  1. If you don't have any safety equipment and documents how to complete the wor...read more
  2. What you check before starting the work at height activi...read more
  3. What is safety equipment you are carry on the du...read more
What are the most common questions asked in Thermax Limited HR round for experienced candidates?

The most common HR questions asked in Thermax Limited interview are for experienced candidates -

  1. What are your salary expectatio...read more
  2. Where do you see yourself in 5 yea...read more
  3. Why are you looking for a chan...read more
How long is the Thermax Limited interview process?

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

Tell us how to improve this page.

Overall Interview Experience Rating

4.3/5

based on 96 interview experiences

Difficulty level

Easy 14%
Moderate 70%
Hard 16%

Duration

Less than 2 weeks 71%
2-4 weeks 15%
4-6 weeks 6%
6-8 weeks 2%
More than 8 weeks 6%
View more

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Thermax Limited Reviews and Ratings

based on 3.6k reviews

4.2/5

Rating in categories

4.0

Skill development

3.9

Work-life balance

3.8

Salary

4.3

Job security

4.1

Company culture

3.5

Promotions

3.9

Work satisfaction

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