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C1 Advanced was developed in response to feedback from language centres that there was a too great gap between the qualifications now known as B2 First and C2 Proficiency. C1 Advanced was designed to allow learners to gain certification for advanced levels of English suitable for use in academic and professional life.
The results of crude oil assay testing provide extensive detailed hydrocarbon analysis data for refiners, oil traders and producers. Assay data help refineries determine if a crude oil feedstock is compatible for a particular petroleum refinery or if the crude oil could cause yield, quality, production, environmental and other problems. [1]
If the test result is expected to be below 0.10% (by mass), prior to performing the test, the sample can be distilled to produce a 10% (by volume) bottoms. [ 1 ] [ 2 ] If the sample contains ash -forming constituents and/or non-volatile additives, these will add to the carbon residue value, and be included as part of the total reported carbon ...
Oil sampling is a procedure for collecting a volume of fluid from lubricated or hydraulic machinery for the purpose of oil analysis. Much like collecting forensic evidence at a crime scene, when collecting an oil sample, it is important to ensure that procedures are used to minimize disturbance of the sample during and after the sampling process.
From January 2015, results for B2 First, B2 First for schools, C1 Advanced and C2 Proficiency began reporting on the scale. From February 2016 A2 Key for schools and A2 Key for Schools, B1 Preliminary and B1 Preliminary for Schools and Cambridge English: Business Certificates (BEC) have reported on the scale. [ 1 ]
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The Ramsbottom test is used to measure carbon residues of an oil. In brief, the carbon residue of a fuel is the tendency to form carbon deposits under high temperature conditions in an inert atmosphere. This is an important value for the crude oil refinery, and usually one of the measurements in a crude oil assay.
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