Vibration Apparatus, Gyroscope Apparatus, Petrol Engine Apparatus, Aeration Unit, Aerobic Digester, Anaerobic Digester, Bio-Gas Digester, Bed Filter Column, Flocculation Unit, Sedimentation Studies Apparatus, Drainage & Seepage Tank, Sedimentation Tank, Petrol Engine Test Rig, Separating & Throttling Calorimeter, Pressure Drop Through Packed Bed, Flow Through Helical Coil