16. Explain how to correctly tension belts and chains 17. Describe the identification and application of different types of locking devices 18. Describe the methods of checking that removed components are fit for purpose, and the need to replace 'lifed' items (such as seals and gaskets) 19. Describe the uses of measuring equipment (such as micrometers, Verniers, run-out devices and other measuring devices) 20. Explain how to make adjustments to components/assemblies to ensure they function correctly (such as setting working clearance, setting travel, setting backlash in gears, preloading bearings) 21. Describe the importance of making 'off-load' checks before running the equipment under power 22. Explain how to check tools and equipment are free from damage or defects, are in a safe and usable condition, and are configured correctly for the intended purpose 23. Describe the importance of maintenance documentation and/or reports following the maintenance activity, and how to generate them 24. Describe the equipment operating and control procedures to be applied during the maintenance activity 25. Explain how to use lifting and handling equipment in the maintenance activity 26. Describe the problems associated with the maintenance activity, and how they can be overcome 27. Describe the organisational procedure(s) to be adopted for the safe disposal of waste of all types of materials 28. Describe the extent of their own authority and to whom they should report if they have a problem that they cannot resolve