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Magnetic particle inspection (MPI) is a nondestructive testing process where a magnetic field is used for detecting surface, and shallow subsurface, discontinuities in ferromagnetic materials. Examples of ferromagnetic materials include iron , nickel , cobalt , and some of their alloys .
The first commercial MPI scanners have recently become available from Magnetic Insight and Bruker Biospin. The hardware used for MPI is very different from MRI. MPI systems use changing magnetic fields to generate a signal from superparamagnetic iron oxide (SPIO) nanoparticles. These fields are specifically designed to produce a single magnetic ...
Ministerial Examinations — taken in grade 10 and 11 level subjects. Exam mark is worth 50% of the final grade. However, the final grade cannot be lower than the ministerial exam mark. For instance, if a student earns a 70% in the course, but an 80% on the exam, their final grade will be an 80%. [18] [19]
Application of the penetrant to a part in a ventilated test area. 2. Application of Penetrant: The penetrant is then applied to the surface of the item being tested. The penetrant is usually a brilliant coloured mobile fluid with high wetting capability. [1] The penetrant is allowed "dwell time" to soak into any flaws (generally 5 to 30 minutes).
The Scholarship Examination (also known as the Grade 5 exam) is a highly competitive Sri Lankan examination first introduced in 1947, [1] conducted by the Department of Examinations of the Ministry of Education. It is optional for students to undertake it during the final year of primary school (Grade 5; usually aged 9–10). Based on the ...
Later (perhaps by association with words such as "inquisitive"), it came to mean "to observe, study intently", and thence (from about the mid-19th century) "test, exam." [ 2 ] [ 3 ] There is a well-known myth about the word quiz that says that in 1791, a Dublin theatre owner named Richard Daly made a bet that he could introduce a word into the ...
Multiple choice questions lend themselves to the development of objective assessment items, but without author training, questions can be subjective in nature. Because this style of test does not require a teacher to interpret answers, test-takers are graded purely on their selections, creating a lower likelihood of teacher bias in the results. [8]
Myocardial perfusion imaging or scanning (also referred to as MPI or MPS) is a nuclear medicine procedure that illustrates the function of the heart muscle . [ 1 ] It evaluates many heart conditions, such as coronary artery disease (CAD), [ 2 ] hypertrophic cardiomyopathy and heart wall motion abnormalities.