LO 5-3 Identify and describe common instruments and techniques to make linear precision measurements

1. Linear Measurement

Linear Measurement

Nearly all measurements common in shop practices involve measurements of length, which is the straight-line distance between two points. Because the measurement is a straight line, these measurements are more accurately called linear measurements . Linear measurements are so numerous and of such importance that a multitude of measuring tools are available for the purpose of obtaining them. Non-precision linear measuring tools include rulers and tape measures. For engine-related service work, commonly used precision linear measuring tools include:

• Dial- and digital-type sliding calipers and vernier calipers
• Micrometers—inside, outside, and depth type
• Telescoping gauges
• Thickness gauges (more commonly called feeler blades )
• Gauge blocks