This is four round interview.. 1st round technical written test +aptitude test with sectional cut off marks based on the their terms. Second round : Group Discussion Third round: General HR Fourth round: Technical HR In first round technical they mostly cover the topics 1.Strength of Materials(SOM)(Mostly from shear and stress and its type and properties) 2.Materials Strength and weakness(For ex: which is the strongest metal:HSS,carbon,Mild Steel..etc) 3. Ic engine properties and fuel properties also. 4. Beams and its types.(eccentricity,stress acting on beams) 5.Important laws: Newtons law,Thermodynamic,Hook's law....etc Make sure to cover this above topic when you attend the interview in this company and study some more important topic also..