This sub-class includes testing of performance of physical, chemical and/or other analytical testing of all types of materials and products such as: •testing of composition and/or purity of minerals, etc. •testing activities in the field of food hygiene, including veterinary testing and control in relation to food production •testing of physical characteristics and/or performance of materials, such as strength, thickness, durability, radioactivity •performance testing of complete machinery, with or without the use of models and/or mock-ups, such as motors, automobiles, electronic equipment •radiographic testing of welds and/or joints testing and measuring of environmental indicators, such as air and water pollution •acoustics and/or vibration testing •qualification and/or reliability testing •failure analysis •product origin and/or quality assessment activities •bunker surveying which involves providing inspections and/or examinations of the fuel for marine vessels and/or bunkers, such as fuel sampling •preparations, checking presence of water in fuel, measurements of oil fuel temperature •inspections of air ducts, water and/or gas pipes, not associated with repair or installation •activities of certification and/or accreditation of products and/or services •operation of forensic laboratories