This book highlights the recent research works on mechanical, manufacturing and plant engineering presented during the 7th International Conference on Mechanical, Manufacturing and Plant Engineering (ICMMPE 2021) held on 29th November 2021. It highlights the latest advances in the emerging areas, brings together researchers and professionals in the field and provides a valuable platform for exchanging ideas and fostering collaboration. Addressing real-world problems concerning joining technologies that are at the heart of various manufacturing sectors, the respective papers present the outcomes of the latest experimental and numerical work on problems in soldering, arc welding and solid-state joining technologies. 

Design of Permanent Rectification for Flare Stack Structure by Using Finite Element Method.- Experimental Investigation of a Swirl Toroidal Trapped-Vortex Miniature Combustor.- Experienced of Thermal Fatigue Failure on Closed Blowdown System Line in Delay Coker Unit.- Numerical Study on the Effects of Sloshing in a Spherical Tank using Double-Side Curved Baffle.- Analysis on the Performance of Logistics Companies with TOPSIS Model.- The Effects of Double-Side Curved Baffle Height on the Liquid Sloshing of a Spherical Tank-Numerical Study.- Influence of water–in-fuel (diesel and biodiesel) emulsions on the performance and emission characteristics of a single cylinder diesel engine.- Survey to Water-in-Diesel Emulsion Characteristics as an Alternative Fuel for CI Engine.- Investment of blending Biofuels and Nanoparticles with Conventional Diesel Fuel to Improve Combustion Process-A Review.- Strategic Maintenance Decision Making under Adverse Contribution Margins- A case study in a cementplant.- Development of Remote Laboratory System With Multi-Degree Viewing Access In Support For Distance Learning Initiative.- Design and Fabrication of a Gasifier for the Production of Liquid Fuel – A case study of Spondias mombin.- Impact and hardness behaviours of heat-treated aluminium 6101 alloy quenched in different waste media.- Investigation of Mechanical Properties of Torrefied Corncob and Rice Husk Briquettes: Modeling and Simulation.- Study and Analysis of Challenges in Wind Energy Implementation.- Impact of Milling on Hardness and Optical Transmission of PMMA Lenses.- Combined Torrefaction and Densification of Rice Husk: Effect of Process Parameters.- Noise Sensitivity of Mode Shape and Mode Shape Difference to Damage Detection.- Conversion of industrial steel waste to smart lightweight structures towards Sustainable Development Goal 12.- Strategy to manage rock quarries by reducing harvested aggregates towards eco-building concept.- Access control system for safety feature of lock A review.- Selection of materials based on thermo mechanical properties of thermal barrier coatings and their failures -a review.- A New Methodology to Investigate the Removal Crater volume in the Particles Blended of Electrical Discharge Operation (EDO).- Time-Dependent Corrosion Resistance Investigation of Hydrophobic Magnesium Alloys.- A Hybrid Control Scheme for Magnetorheological Elastomer Under Impact Loading Application.- Influence of the Polymethylmethacrylate (PMMA) Content Variation on the Microstructure, Density and Compressive Properties of Established Porous Magnesium (Mg).- Comparison of Joint Configuration for Aluminum 6061 Tailor Welded Blank with Dissimilar Thicknesses Using Friction Stir Welding.- An Evaluation Model of Lean Technique Implementation in Remanufacturing Process.- Design for Assembly and Disassembly on Product Design of Flat Panel Display.- Flexural Strength Optimization for Hybrid Glass/Jute Fiber Reinforced Epoxy Composite Fabricated via Vacuum Infusion.- Specific strength of sandwich-structured composite of open-cell metallic foam/resin joined by friction stir incremental forming.- Interface Damage and Delamination Behaviour Prediction of HAp Coating in Artificial Femoral Stem Component of Total Hip Replacement.- Mechanical Properties of Injection-Molded Polylactic Acid (PLA) Reinforced with Magnesium Hydroxide for Biomedical Application.- Development of Composite Aerostructure for UAV Application.- AC Pipe Structural Dynamic Characterization in On-Off Vehicle Conditions.