system consists of measuring distances in inches rather than metres, pounds rather than Kilograms etc. This was once a system us by the British and a lot of imperial measurements are used in conjunction with the metric system in this country to this day. This is seen when we measure height in feet and inches rather than metres and centi-metres or with pipework where its size is defined in inches. The metric system utilises the International System of Units or SI units for short. Through the use of base units and set prefixes, measurements and values are directly communicable regardless of a language barrier. A fixed reference point or datum is often a flat edge or point at the corner of an object from which all your measurements are taken. This makes it so all markings and lines in reference to this point are correct in relation to each other. Adding more reference points increases your accuracy and further minimises errors. Explain the meaning of the different symbols and abbreviations found on the documentation that they use (such as wiring and component symbols, surface finish, electronic components, weld symbols, linear and geometric tolerances, pressure and flow characteristics) [K13] Describe the extent of their own responsibility, when to act on their own initiative to find, clarify and evaluate information, and to whom they should report if they have problems that they cannot resolve You should always seek aid if you're anxious or worried about a safety concern or when you're not sure as to how something should be done so that you can benefit and learn from it to which you'll have a better understanding if something similar occurs again. But you should try to take the initiative when evaluating information and by taking initiative, you develop a greater level of confidence when working on machinery to which better develops your learning and understanding. Save & Refresh Save & Quit Cancel Nothin