Aviation Maintenance and Materials Practice Questions

These vocabulary flashcards cover aviation maintenance topics including corrosion types, technical drawing standards, tool usage, and hardware identification based on lecture transcripts.

Pitting corrosion

The most frequently seen corrosion type on aluminum and magnesium alloys.

Isometric drawing

A pictorial illustration style that combines elements of orthographic projection and tilts the object to show three sides simultaneously.

Center punch

A tool typically used to create large indentations to guide a twist drill.

Aluminum aircraft construction

Widely used because it has an optimal strength-to-weight ratio.

Nylon locknut

A fastener that resists loosening due to a nylon piece secured inside the lower section of the nut.

Exfoliation corrosion

A severe form of intergranular corrosion where the surface grains lift, typically identified by the metal surface being lifted due to corrosion buildup.

Removed section

A type of sectional drawing that reveals internal details of a part by showing a cutaway, often enlarged and displayed beside the main view.

Electrical grounding

The concept of creating a safe electrical connection to a structure or return path.

Electrolyte

The simplest to eliminate of the essential elements required for corrosion.

Bilge areas

Sections within an aircraft where fluids, water, and debris naturally collect.

AN stainless steel bolt

A bolt classified by a single raised line on its head.

Fluid system seal

A component that prevents fluid from passing and keeps contaminants out.

Silver corrosion

Corrosion that typically appears as a dark brown or black film.

Finish marks

Symbols on a technical drawing signify that the surface must be machine-finished.

Ductility

A material property referring to the ability to be stretched or shaped without breaking.

Electrochemical corrosion requirements

The four necessary conditions are an Anode, Cathode, Electrolyte, and Electrical connection.

Ultrasonic inspection

An inspection method using sound waves to detect corrosion or moisture in bonded honeycomb structures.

Offset screwdriver

A type of screwdriver ideal when vertical space is too tight for a standard tool.

Galvanic corrosion

Corrosion resulting from the contact between dissimilar metals in an electrolyte.

Dimension lines

Thin solid lines with arrowheads on each end that indicate where a measurement starts and ends.

Alodizing

A chemical process applied to aluminum to improve paint adherence and boost corrosion resistance.

Flare nut wrench

The type of wrench used to tighten a B-nut on a fluid line.

Standard steel bolt

An aircraft bolt indicated by an asterisk ($*$) on the head.

Class 2 rating

In threaded fasteners, this represents a free fit.

Titanium

A non-ferrous metal that has the unique property of being able to be case hardened.

Castle nut

A nut designed with slots for a cotter pin or safety wire to secure it.

Corrosion blending ratio

The standard ratio for an area where corrosion has been removed is a $20 \text{ to } 1$ length-to-depth.

Wiring diagrams

Diagrams that depict all electrical components and circuits in an aircraft using identification codes.

Solid rivet head markings

Used to indicate the material used in the rivet.

NAS close tolerance steel bolt

A bolt identified by an $X$ inside a triangle on the head.

Title block

The section of a drawing used to uniquely identify each aircraft drawing.

Drawing size C

In the universal numbering system, the letter representing a size of $17\text{"}\times 22\text{"}$.

Soft-faced hammers

Tools meant for delicate surfaces and shaping soft metals.

Brake mean effective pressure

The pressure of an engine with $2000\text{ cubic inch}$ displacement producing $800\text{ BHP}$ at $2100\text{ RPM}$ is $160\text{ psi}$.