R. MAISONNEUVE, PUBLIPHOTO DIFFUSION / SCIENCE PHOTO LIBRARY R. MAISONNEUVE, PUBLIPHOTO DIFFUSION / SCIENCE PHOTO LIBRARY
Petroleum analysis. Technician analysing petroleum samples after refining. Refining is the splitting-up of crude oil into its constituent parts (fractions), one of which is petroleum. Each part has different properties. This quality control check is to ensure that the petroleum has not been contaminated with other fractions which would adversely affect its performance when used in an engine.
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