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BASIC MATHEMATICAL PROCESSES
BASIC FORMULAE IN NDT AND WORKED EXAMPLES
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acoustic impedance Algebra aluminium ampere ampere per metre amplitude ratio amps angle probe antilog attenuation beam angle Calculate cavity characteristic curve coil turns compression wave conversion factor convert cross-multiplying curie decibels decimal point defect denominator depth of penetration dividing both sides dose-rate eddy current eddy current field electrical equation equivalent round example exposure exposure-time field strength Fill Factor film density Formulae in NDT fraction frequency geometric unsharpness given gives graph inches incident indices intensity inverse square law Iridium-192 source joule kV X-rays length linear absorption coefficient litres log tables logarithms to base mA.min magnetic flux density magnetic permeability material mathematical millimetres mR/h multiplied non-destructive testing notation obtained phase lag radiation radiographic shear waves Similarly simple Snell's Law source-to-film distance specimen thickness square root standard depth subtract symbols system of units trigonometric functions ultrasonic beam uranium wavelength written