Hello Yugal, Greetings!

The main sub-branch of mechanical engineering is Auto-mobile engineering.

Besides following are also sub-branch of mechanical engineering:

Industrial & Production engineer

Industrial engineering

Mechatronics engineering

Industrial Automation engineering

Robotics engineering

Production engineering

Thank you, hope this helps.

Hello there! 

Mechanical is a core branch. It's an extremely broad discipline and includes materials science, fluid mechanics, control theory, bioengineering and heat transfer, among other fields, like robotics, thermodynamics, nanotechnology and manufacturing.

Some of the most common mechanical engineering branches where graduating students could find careers include:

• Acoustical engineering: the manipulation and control of vibration in order to reduce unwanted noise
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• Manufacturing engineering: optimizing manufacturing techniques, developing processes as well as machines, tools, and equipment for the manufacture of goods
• Thermal engineering: creating and maintaining comfortable and safe environments through the control of heating and cooling systems
• Vehicle engineering: the design and manufacture of all manner of vehicles
• Aerospace engineering: vehicle engineering as specific to air and space travel
• Thankyou