M.Tech Thermal Engineering

There is no straight forward answer to your question as it largely depends on your interests and future plans. If you want to explore the field of thermal energy and related systems on an advanced level with technical expertise in the concepts of heat transfer, HVAC, and thermodynamics, you will enjoy the 2-year academic ride. You can also go for a PhD in this field after completing a master's degree.

The earning potential is quite decent in this field with rewarding opportunities, especially in the research and academic domains. Having said that, you must have a strong portfolio with internship experience and research projects to stand out in front of the recruiter and get promising paychecks.

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The elective MTech Thermal Engineering subjects may vary depending on the institution where you're pursuing the course. Some popular elective subject choices offered across popular colleges include:

• Advanced IC Engines
• Advanced Steam Power Plants
• Aerodynamics
• Refrigeration Systems and Components Design
• Renewable Energy
• Thermal Behavior of Advanced Materials
• Solar Thermal Technologies
• Multi-Phase Flow and Heat Transfer

To choose the right professional electives, you must think about your passions and interests, the subjects that seem fun to explore, have scope for skill enhancement, are aligned with the market demands, and are scoring and easy to understand.

This is completely your choice. If you want to explore the area of thermal energy after studying the fundamentals of Mechanical Engineering, you can opt for an M Tech in Thermal Engineering course. No doubt, the degree will let you explore good earning opportunities in the job market demanding advanced-level technical expertise, making you an asset for the recruiter.
Coming to the job aspect after BTech Mechanical Engineering, this can also be a promising choice in terms of career scope and earning potential. If you are a mechanical wizard who loves to play with machines and are satisfied with your 4-year academic ride, you look for a job and start earning right after graduation.

If you are someone who wishes to get in-depth knowledge of the foundational concepts of mechanical systems and thermal energy transfer and utilization and wants to earn a dual degree in 5 years, which includes theory classes and skill-based learning via lab work, this could be a go-to course option for you. This also turns out to be a cost-effective option that can lead to promising earning opportunities in the long run.
Having said that, you need to indulge in some self-introspection and see for yourself if you are really interested in the course, whether it aligns with your future plans, and if you would like to put your time and money in the same. Best of luck! ;)