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Thermax Limited Interview Questions and Answers for Experienced

Updated 27 Jun 2025
Popular Designations

145 Interview questions

An Operations Engineer was asked
Q. What is the difference between PLC and SCADA?
Ans. 

PLC is a hardware device that controls processes, while SCADA is a software system that monitors and controls processes.

  • PLC is a programmable logic controller used to control industrial processes.

  • SCADA is a supervisory control and data acquisition system used to monitor and control processes.

  • PLC is hardware-based, while SCADA is software-based.

  • PLC is typically used for controlling specific tasks within a process, ...

View all Operations Engineer interview questions
An Operations Engineer was asked
Q. What is the full form of HPP in SCR?
Ans. 

HPP in SCR stands for High Pressure Pump.

  • HPP is a crucial component in a Selective Catalytic Reduction (SCR) system.

  • It is responsible for pumping the diesel exhaust fluid (DEF) into the exhaust stream to reduce harmful emissions.

  • Examples of HPP brands include Bosch, Delphi, and Cummins.

View all Operations Engineer interview questions
An E Commerce Manager was asked
Q. What is your expected CTC?
Ans. 

My expected CTC is negotiable based on the responsibilities and opportunities offered by the role.

  • My expected CTC is based on industry standards and my level of experience in E-commerce management.

  • I am open to discussing the compensation package in detail during the interview process.

  • I am looking for a competitive salary that reflects my skills and contributions to the company.

  • I am also interested in benefits such...

View all E Commerce Manager interview questions
A Field Service Engineer was asked
Q. What is your knowledge of PLCs and VFDs?
Ans. 

PLC (Programmable Logic Controller) and VFD (Variable Frequency Drive) are essential for automation and motor control in various industries.

  • PLC is used for automation of industrial processes, such as assembly lines.

  • VFD controls the speed and torque of electric motors by varying the frequency and voltage.

  • Example of PLC: Siemens S7 series used in manufacturing.

  • Example of VFD: ABB ACS580 used in HVAC systems.

View all Field Service Engineer interview questions
A Shift Engineer was asked
Q. What could cause a gradual decrease in condenser vacuum?
Ans. 

Condenser vacuum gradually lowering trend may be due to air leakage, cooling water temperature increase, or decrease in cooling water flow rate.

  • Air leakage in the condenser system can lead to a decrease in vacuum levels.

  • Increase in cooling water temperature can reduce the efficiency of the condenser, causing vacuum levels to drop.

  • Decrease in cooling water flow rate can also impact the condenser's ability to mainta...

View all Shift Engineer interview questions
A Territory Sales Manager was asked
Q. What is enthalpy?
Ans. 

Enthalpy is a thermodynamic property that represents the total heat content of a system.

  • Enthalpy is denoted by the symbol H.

  • It is defined as the sum of the internal energy of a system and the product of its pressure and volume.

  • Enthalpy change (∆H) is the difference in enthalpy between the initial and final states of a system.

  • Enthalpy is commonly used in chemical reactions and phase changes.

  • It can be measured using...

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A Senior Engineer was asked
Q. What are the interlocks and permissives of a boiler and turbine?
Ans. 

Interlocks and permissives are safety mechanisms in place to prevent unsafe operation of boiler and turbine systems.

  • Interlocks prevent certain actions from taking place unless specific conditions are met

  • Permissives allow certain actions to take place only if specific conditions are met

  • Example of interlock: Boiler feed pump interlock prevents the boiler from starting unless the feed pump is running

  • Example of permis...

View all Senior Engineer interview questions
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A Senior Engineer was asked
Q. How do you assign a new channel in Honeywell DCS?
Ans. 

To assign a new channel in Honeywell DCS, you need to access the configuration software and follow the steps to add the channel.

  • Access the Honeywell DCS configuration software

  • Navigate to the channel configuration section

  • Add a new channel by specifying the channel number, type, and other relevant parameters

  • Save the changes and verify the new channel is successfully assigned

View all Senior Engineer interview questions
A Senior Engineer was asked
Q. Tell us about the Woodward 505.
Ans. 

Woodward 505 is a versatile control system used in industrial applications.

  • The Woodward 505 is a widely used control system in industries such as power generation, oil and gas, and marine.

  • It offers advanced features like PID control, sequencing, and communication capabilities.

  • The Woodward 505 is known for its reliability and robustness in harsh operating environments.

  • It can be easily integrated with various types ...

View all Senior Engineer interview questions
A Senior Engineer was asked
Q. What is PID and how does it work?
Ans. 

PID stands for Proportional-Integral-Derivative, a control loop feedback mechanism used in engineering.

  • PID is a control algorithm that calculates an error value as the difference between a desired setpoint and a measured process variable.

  • Proportional (P) control responds to the current error value.

  • Integral (I) control accumulates past errors to correct the present error.

  • Derivative (D) control predicts future error...

View all Senior Engineer 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

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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

Explore 3.6k Reviews and Ratings
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