# unitsofmeasure - CDX A-Zero Units of Measure Reference...

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CDX A-Zero: Units of Measure Reference Sheet 2002 DVP Media Pty Ltd 1 / 7 CDX A-Zero: Reference Sheet Units of Measure There are two basic measurement systems the technician must understand: The Imperial system, used mainly in the U.S. and the SI System, or Metric System, used in Europe, Australia and the rest of the world. The Metric System bases all of its length measurements around the meter. The measurements used in the Imperial system are based on various ancient references. As a technician, you will need to understand both systems because certain tools and specifications use both systems. The following conversion charts are designed to help you not only with length conversions, but other useful physical concepts you will need to practically apply in your workshop. Some of the measurements explained will be used in day-to-day work. Others may not be relevant until more advanced studies are undertaken. Internet References: http://lamar.colostate.edu/~hillger/ http://www.bipm.fr/enus/3_SI/si.html http://www.joshmadison.com/software/convert

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CDX A-Zero: Units of Measure Reference Sheet 2002 DVP Media Pty Ltd 2 / 7 Multiples and decimals for the SI system The units used in the SI or Metric System are referred to as basic units. Prefixes are added to the units to expand their use. Always use the correct case when using metric measurements and prefixes. 1 Mm is 1 megameter and is very different to 1 mm (millimeter). Factor Prefix Symbol 1,000,000,000 giga G 1,000,000 mega M 1,000 kilo k 100 hecto h 10 deca da 1 No prefix 0.1 deci d 0.01 centi c 0.001 milli m 0.0001 micro μ 000001 nano n Length Length is a measurement of linear distance. The metric system uses millimeters (mm), centimeters (cm), meters (m) and kilometers (km). The Imperial system uses inches and fractions (“), feet (‘) and miles (mi). You will use these measurements frequently when replacing and repairing fasteners, determining wheelbase, shaft sizes—in short, any time you would use a ruler. Length Conversions 1 km = 1000 m 1 mi = 1.61 km 1 km = 0.62 mi 1 ft = 0.304 m 1 cm = 0.39 “ 1” = 2.54 cm 1 mm = 0.039 “ 1/2” = 12.7 mm
CDX A-Zero: Units of Measure Reference Sheet 2002 DVP Media Pty Ltd 3 / 7 Mass Mass is a unit or system of units by which a degree of heaviness is measured. The metric system

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## This note was uploaded on 09/13/2011 for the course AUTOMOTIVE 181 taught by Professor Saxton during the Spring '11 term at Community College of Philadelphia.

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unitsofmeasure - CDX A-Zero Units of Measure Reference...

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