Glossary - I
Improper fraction. A fraction with the numerator equal to or greater than the denominator.
Inside calipers. Calipers with outward curved legs for measuring inside diameters, such as diameters of holes.
Installation drawing. A drawing that includes all necessary information for a part or an assembly in the final installed position in the aircraft.
Intergranular corrosion. An attack along the grain boundaries of an alloy that commonly results from a lack of uniformity in the alloy structure.
Inductance. The ability of a coil or conductor to oppose a change in current flow.
Inductive reactance. The opposition to the flow of current which inductances put in a circuit.
Inductor. A coil of wire that produces inductance in an electrical circuit.
Insulator. A material that does not conduct electrical current very well or not at all. Examples are glass, ceramic, and plastic.
Ion. An atom or group of atoms in which the number of electrons is different from the number of protons. It is a positive ion if the number of electrons is less than the number of protons, and a negative ion if the number of electrons is greater than the number of protons.
Isometric drawings. A drawing that uses a combination of the views of an orthographic projection and tilts the object forward so that portions of all three views can be seen in one view.
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