Thermax Limited Interview Questions, Process, and Tips

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Q1. What is the importance of Boiler Chemical Preservation
Ans. 
Boiler chemical preservation is important to prevent corrosion and maintain efficiency in power plants.
• Prevents corrosion in boiler components such as tubes and drums

• Maintains heat transfer efficiency by preventing scale buildup

• Extends the lifespan of the boiler system

• Ensures safe and reliable operation of the power plant

• Examples: using oxygen scavengers to prevent oxygen corrosion, using pH control agents to maintain
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Q2. What is the importance of DM Plant in Power Plant
Ans. 
DM Plant is crucial in power plants for removing impurities from water used in boilers, preventing scaling and corrosion.
• DM Plant helps in producing high-purity water for boiler feed, reducing scaling and corrosion in the boiler tubes.

• It removes impurities like calcium, magnesium, and silica from water, preventing damage to the boiler.

• DM Plant plays a key role in maintaining the efficiency and longevity of the power pl...read more
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Q1. What is the importance of Hand over & Take over process
Ans. 
Hand over & Take over process is important for ensuring smooth transition of responsibilities and operations in power plants.
• Ensures continuity of operations by transferring critical information and responsibilities from one shift to another

• Helps in identifying any ongoing issues or concerns that need immediate attention

• Reduces the risk of errors or accidents due to miscommunication or lack of information

• Allows for pro...read more
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Q2. What is the importance of TBT
Ans. 
TBT (Tributyltin) is important in power plants for preventing biofouling in cooling systems.
• TBT is used as a biocide to control the growth of organisms such as algae, barnacles, and mussels in cooling water systems.

• Preventing biofouling helps maintain efficient heat transfer in power plant equipment.

• TBT is regulated due to its environmental impact, as it can be toxic to marine life and bioaccumulate in the food chain.
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Q1. What is the purpose of job changing
Ans. 
Job changing can provide new challenges, opportunities for growth, higher salary, better work-life balance, and improved job satisfaction.
• Opportunity for career advancement

• Higher salary and benefits

• Improved work-life balance

• Enhanced job satisfaction

• Acquiring new skills and experiences

• Escaping a toxic work environment

• Geographical relocation

• Seeking better company culture
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Q2. What is the current CTC
Ans. 
CTC stands for Cost to Company, it refers to the total salary package of an employee including all benefits and perks.
• CTC includes salary, bonuses, benefits, and any other perks provided by the company

• It is important to consider CTC when evaluating job offers

• CTC can vary based on the level of the position, industry, and company policies
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Q1. What is the purpose of job changing
Ans. 
Job changing can provide new challenges, opportunities for growth, higher salary, better work-life balance, and improved job satisfaction.
• Opportunity for career advancement

• Higher salary and benefits

• Improved work-life balance

• Enhanced job satisfaction

• Acquiring new skills and experiences

• Escaping a toxic work environment

• Geographical relocation

• Seeking better company culture
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Q2. What is the current CTC
Ans. 
CTC stands for Cost to Company, it refers to the total salary package of an employee including all benefits and perks.
• CTC includes salary, bonuses, benefits, and any other perks provided by the company

• It is important to consider CTC when evaluating job offers

• Example: If the CTC for a position is $100,000, it means the total cost to the company for employing that person is $100,000 per year
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Q1. A 22 kw AOP motor CT cable burn again and again what is the reason ?
Ans. 
The repeated burning of a 22 kW AOP motor CT cable may be due to overloading, short circuits, poor insulation, or incorrect cable sizing.
• Check for overloading of the motor causing excessive heat in the cable

• Inspect for short circuits in the motor or the wiring

• Ensure proper insulation of the cable to prevent overheating

• Verify if the cable size is appropriate for the motor's power requirements
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Q2. When CT of AOP motor is bypassed then what effect on the motor ?
Ans. 
Bypassing the CT of an AOP motor can lead to overcurrent and damage to the motor.
• Bypassing the CT can result in the motor drawing excessive current.

• This can lead to overheating of the motor windings.

• Overcurrent can cause damage to the motor components.

• It can also pose a safety risk due to potential electrical faults.
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Q1. What is the synchronisation process of plant ?
Ans. 
Synchronisation process of a plant involves matching the frequency, voltage, and phase angle of the incoming generator with the grid.
• Ensure the generator frequency matches the grid frequency (50Hz or 60Hz).

• Match the voltage levels of the generator with the grid.

• Adjust the phase angle of the generator to synchronize with the grid.

• Use synchronizing equipment like synchroscope or synchronizing lamps to ensure proper synch...read more
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Q2. Brief discussion about alternator and transformer protection system ?
Ans. 
Alternator and transformer protection systems are essential for preventing damage and ensuring safe operation.
• Alternator protection systems typically include overcurrent, overvoltage, and reverse power protection to safeguard the alternator from damage.

• Transformer protection systems often involve differential protection, overcurrent protection, and temperature monitoring to prevent overheating and insulation breakdown.

• ...read more
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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
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Q2. About air dryers working
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Q1. Asked questions About pumps?
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Q2. About Latent heat?
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Q1. Commissioning process?
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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
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Q1. Questions asked About goals
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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...read more
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Q1. About yourself, family background.
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Q2. Past experience, current job clarification
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Q1. About Boilers / heat pump and check points ?
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Q2. If gas pressure is low what are the possibility and what is the corrective actions taken by you ?
Ans. 
Low gas pressure can lead to various issues like inefficient operation or equipment failure. Corrective actions include checking for leaks, adjusting regulators, and ensuring proper ventilation.
• Check for leaks in the gas system

• Adjust regulators to increase gas pressure

• Ensure proper ventilation for gas combustion

• Inspect gas supply lines for blockages or restrictions

• Verify that gas appliances are functioning properly
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Q1. Total experience and current total ctc ?
Ans. 
I have 5 years of experience in the field and my current total CTC is $60,000.
• 5 years of experience in service engineering

• Current total CTC is $60,000

• Experience includes troubleshooting, maintenance, and repair of equipment
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Q1. What is Piping.
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Q2. What is supportive instrument for Piping.
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