Calibration and Use of Linear Measuring Instruments involves the proper calibration and utilization of various precision instruments like Vernier calipers, micrometers, height gauges, depth micrometers, bore gauges, telescopic gauges, and comparators to ensure accurate measurements of linear dimensions Measurement of Assembly and Transmission Elements includes measuring screw thread parameters using tools like Screw thread Micrometers, the Three-wire method, and Toolmaker’s microscope to assess the quality and accuracy of screw threads. Measurement of Gear Parameters: Measurement of Features in Prismatic Components Using CMM are used to precisely measure the dimensions of complex prismatic components and CNC programming allows for automated and repeatable measurements.. Surface Metrology involves measuring form parameters like straightness, flatness, roundness, cylindricity, perpendicularity, runout, and concentricity using specialized equipment like Roundness testers to ensure surface quality and precision.These diverse measurement techniques play a crucial role in ensuring the quality, accuracy, and reliability of components and products in various industries, contributing to advancements in manufacturing processes and product development.