This book has been focused to bring the appropriate knowledge ingradients spread in different chapters covering mechanical engineering, engineering materials and its composition, properties, use of cast iron, steel, Iron-Carbon equilibrium diagram, properties of materials (physical, chemical, mechanical etc), measurement methods, manufacturing technologies, machine tools, fluid properties and fluid power, thermodynamics and steam engineering, reciprocating engines. This also briefly covers mathematical concepts and its use as an applications tool, basic knowledge of Computerized Numerical Control (CNC) for requisite analysis, artificial Intelligence and machine learning (AIML), MATLAB etc. It is proposed next, to briefly elaborate the pertinent details with some relevant case studies, emanating from the domain of mechanical sciences. Some innovative mechanical engineering projects/entrepreneurial dynamics and its application, internship in engineering sector, make it more versatile and useful inclusions which have been made.