T.O. 33B-1-1Glossary 33FIELD, MAGNETIC (MT): The space within and surrounding a magnetized part or a conductor carrying current inwhich magnetic lines of force exists.FIELD, RESIDUAL (MT): The magnetism that remains in a piece of magnetizable material after the magnetizingforce has been removed.FIELD, RESULTANT (MT): The magnetic field resulting when two or more magnetizing forces, operating in differentdirections, are applied to ferromagnetic materials.FILAMENT (RT): The source of electrons in a hot-cathode tube. It is usually a heated wire.FILAMENT TRANSFORMER (RT): A transformer supplying power to heat the filament of a hot-cathode. Theprimary and secondary windings must be sufficiently insulated to withstand the peak potential difference between thecathode and earth.FILLED CRACK: A crack-like discontinuity, open to the surface, but filled with some foreign material - oxide, grease,etc. - which tends to prevent penetrants from entering.FILLET: Radius imparted to the inside of two meeting surfaces.FILL FACTOR (MT): The square of the ratio of the diameter of a part to the diameter of one encircling coil(s). Thesquare of the ratio of the internal coil diameter to the bore diameter for internal probes. The fill factor is a measure ofcoupling between the encircling or internal coil and the test object.FILM BADGE (RT): A piece of masked radiographic film worn in the form of a badge that is used to measureexposure. The amount of exposure is determined from the degree of film blackening.FILM BASE (RT): A flexible, transparent, or translucent material that is coated with a photosensitive emulsion.FILM CLEARING TIME (RT): See CLEARING TIME. FILM CONTRAST (RT): See CONTRAST, FILM. FILMDENSITY (RT): See DENSITY, FILM.FILM GAMMA (RT): Term used to describe the amplification factor of a radiographic film, equal to the absolute slopeof the characteristic curve.FILM GRAININESS (DIRECT X-RAY EXPOSURES) (RT): The visual impression of irregularity of density, in areaswhere exposure is macroscopically uniform, due to the random spatial distribution of X-ray quanta absorbed in thefilm. In general, fast films exhibit greater graininess than slow films.FILM HOLDER (RT): A light-tight carrier for films and screens.FILM ILLUMINATOR (RT): A device incorporating a suitable source of illumination for viewing radiographs or othertransparencies.FILM LATITUDE (RT): Latitude refers to the exposure range within which a satisfactory radiograph is produced.Films which have the widest latitude are those which have the lowest film gradient and therefore the lowest filmcontrast.FILM PROCESSING (RT): See PROCESSING, FILM.FILM, RADIOGRAPHIC (RT): A photographic film that is usually coated on both sides with an emulsion designed foruse with X-rays and gamma rays.FILM RING (RT): A film badge worn as a ring to measure the exposure of the fingers to ionizing radiation.
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
