AED Senior Terms - Engineering

Careers

Positions held by professionals through which an exchange for loyal and adequate performance extended employment and opportunities for advancement are provided

Machining

Removal of certain selected areas from a part to obtain a desired shape or finish.

Splines

Ridges or teeth on a drive shaft that mesh with grooves in a mating piece and transfer torque to it, very strong.

Normalizing

A form of heat treatment where the metal is heated to its critical temperature and allowed to cool slowly in still air. Relieves stress in the metal.

Rhombus

A four sided flat shape with straight sides where all sides have equal length.

Team Work

A group of employees working together to reach a specific goal.

ACME Threads

An American screw thread having a section that is a mean between the V and square threads. Offers high strength and are largely used for feed and adjusting screws.

Brainstorm

A group technique for solving problems, generating ideas, stimulating creative thinking, etc. by unrestrained spontaneous participation in discussion.

Cover Letter

A letter of introduction and purpose, a one-page letter a job seeker sends to an employer telling them who he/she is and why he/she is sending a resume.

Radius

A line segment with one endpoint at the center of a circle and the other endpoint on the circle.

Inscribed

A polygon whose vertices all lie on a circle.

3D Printer

A printer that uses molten plastic during a series of passes to build a 3D version of the desired output.

Trapezoid

A quadrilateral (4 sides & 4 angles) with only one pair of parallel sides.

Trapezium

A quadrilateral with no parallel sides.

Spotface

A shallow recess like a counterbore, used to provide a good bearing surface for a fastener.

Keyway

A slot in a hub or material around a shaft that receives a key.

Diameter

A straight line passing from side to side through the center of a circle or sphere.

Steel

A strong, hard metal made of iron and carbon.

Datum

A theoretically exact point, axis, or plane derived from the true geometric counterpart of a specific feature. The origin from which the location, or geometric characteristic of a part feature, is established..

Isosceles

A triangle in which two sides are the same, while the other side is different. The angles opposite the equal sides are also equal.

Obtuse Triangle

A triangle that has 1 obtuse angle and 2 acute angles.

Equilateral Triangle

A triangle that has all three equal sides and all angles equal 60 degrees.

Scalene Triangle

A triangle that has no (congruent) equal sides.

Auxiliary View

A view that is used to show features that is located on an inclined surface in true size and shape.

Ferrous Metal

Any metal formed from iron, such as steel or stainless steel.

Ceramics

Any of various hard, brittle, heat-resistant, and corrosion-resistant inorganic materials made by shaping and then firing a nonmetallic mineral, such as clay, at a high temperature.

Geometric Dimensioning

Defined by ASME Y14.5, 2009, standard, specified on prints by feature control frame, modifiers are used to specify how it is applied.

Torsion Springs

Designed to transmit energy by turning or twisting action.

Semiconductors

Elements that conduct an electric current under certain conditions

Interference

The amount of overlap that one part has with another when assembled.

Intersection

The point at which two or more lines intersect or cross.

Surface Finish

The waviness, roughness, lay, and flaws of a surface. Also referred to as surface texture.

True Position

Theoretical exact location of an axis or center plane of a feature.

Injection Molding

This is a type of manufacture process that involves plastic granules being funneled into the hopper and is heated and cooled into a mold cavity.

Square Threads

Threads designed to transmit power.

Manufacture

To make by hand or by machine; to change raw material into a new product using sketches or drawings to produce part.

Tangent

A line that intersects a circle in exactly one point.

Right Triangle

A triangle that has a 90 degree angle.

Code of Ethics

Principles of conduct within an organization that guide decision making and behavior.

Prototyping

Process of building a model that demonstrates the features of a proposed product.

Transistors

Semiconductor device that amplifies, oscillates, or switches the flow of current between two terminals.

Diodes

Semiconductors that pass electrons through in one direction; from the negative to the positive terminal.

Pictorial

Sketch that shows height, width, and depth in a single view. Perspectives are in the pictorial family.

Technical Skills

Skills that involve the ability to perform tasks in a specific discipline or department.

Threads

Spiral ridges on a screw.

Flat Springs

Spring that is rolled out flat and layered. A leaf spring (used on a truck) is an example of a flat spring.

Unified Threads

Standard thread form and series. Most common in the US and Canada. For nuts, bolts, and a wide variety of other threaded fasteners.

Geometric Tolerances

State the maximum allowable deviation of a form or a position from the perfect geometry implied by a drawing. Above and beyond the dimension tolerance.

Capacitors

A device for storing an electric charge. They are made of two metal plates with an insulator in between, and used extensively in ordnance, to provide the firing charge.

Wiring Diagram

A document, also known as a wiring Schematic, that usually consists of multiple pages and that shows the following: how the wires in a network connect to switches and other nodes, what types of cables are used, and how patch panels are configured. It usually includes details about each cable run.

Creativity

A feature of thought and problem solving that includes the tendency to generate or recognize ideas considered to be high-quality, original, novel, and appropriate.

Graphite

A form of the inorganic element carbon in which each carbon atom is bonded tightly to three other carbon atoms in flat layers.

Resume

A form used by a potential employee to tell an employer what your education, skills and qualifications are for a job.

Composites

A group of inorganic materials made from a combination of 2 or more different materials, in layers or as a mixture.

Assembly

A group of machined or handmade parts that fit together to form a self-contained unit.

Cast Iron

A brittle alloy with high carbon content; iron that has been melted, then poured into a form and cooled; can be made into any shape desired.

Circumscribed

A circle that contains all the vertices of a polygon

Inductors

A circuit component that is a coil of wire that stores energy in a magnetic field.

Polygon

A closed geometric figure in a plane formed by connecting line segments endpoint to endpoint with each segment intersecting exactly two others. -These- are classified by the number of sides they have, such as a triangle has three sides, a quadrilateral has four sides, and a pentagon has five sides.

Portfolio

A collection of photographs, drawings, etc. that you use as an example of your work, especially when applying for a particular job.

Counterdrill

A conical transition from one size hole to another.

Countersink

A conical-shaped recess around a hole, often used to receive a tapered screw.

Counterbore

A cylindrical recess around a hole usually to receive a bolt head or nut.

Acute Angle

An angle that is less than 90 degrees.

Obtuse Angle

An angle that measures more than 90 degrees but less than 180 degrees.

Spring

A mechanical device that is a helical coil. It can expand and contract by the pressure, force and stress that is applied to the spring.

Rhomboid

A parallelogram in which adjacent sides are of unequal lengths and angles are non-right angled.

Engineer

A person who is trained in and uses technological and scientific knowledge to solve practical problems.

Interference Fit

Also known as a press or friction fit, fastening between two parts which is achieved after the parts are pushed together.

Force Fit

Also known as shrink fit, when the parts can only be easily put together when one or the other is expanded by heating or contracted by cooling.

Buttress Threads

Also known as the breech-lock thread. It has two different thread profiles. One is lead screw and the other is hydraulic sealing threads. Used in the oil fields.

ANSI

American National Standards Institute: A private, non-profit organization that coordinates the development and use of voluntary consensus standards in the United States.

ASME

American Society of Mechanical engineers; specifies requirements and standards for pressure vessels, piping, and their fabrication.

Sustainable

Concept of developing products, structures, and services that are environmentally and socially responsible, and economically practical.

Line Types

Construction, object, hidden, center, break (jagged line), section (diagonal lines), phantom, and dimension lines. Lines that help you visualize the part.

Descriptive Geometry

Graphic techniques to show geometric relations among 3D elements of points, lines & planes in space. Used to determine the angles between planes, lines and cylinders.

Additive Manufacturing

Involves making 3-D solid object from a digital model. In additive rapid prototyping process generates a prototype for design evaluation and troubleshooting. Directly produces a metal, ceramic,or polymer component suitable for final use.

Perpendicular

It is 90 degrees from a given line, plane, or surface.

Ductility

Malleability; flexibility; ability to be extruded into a small opening, such as wire. Ability to bend without breaking.

Innovative

Marked by a new or unusual way of doing things.

Carbon Steel

Ordinary, unalloyed steel in which the residual elements are controlled. Any increase in carbon content increases the strength and hardness of the steel but reduces its ductility and weldability. Steels with carbon can be heated.

Section

Part cut to show the inside to eliminate hidden lines.

Plastic

Pliability; condition of being able to be shaped or formed.

Rolled Threads

Process y which steel is extruded to form the threaded portion.

Running and Sliding Fit

Provide a running performance with suitable lubrication allowance. Range from RC 1 ( close fits) to RC 9 (loose fits). Loose fit, has a positive clearance. Use where accuracy is not essential.

Feature Control Frame

Rectangular box with sections for geometric tolerance symbol, and the reference to a specific datum.

Malleability

The ability of a material, like metal, to be hammered or rolled into sheets

Communication Skills

The ability to speak, listen, and write effectively.

Tolerance

The acceptable amount of dimensional variation that will still allow an object to function correctly.

Fabrication

The act of manufacturing.

Heat Treat

The controlled heating and cooling of metals for the purpose of altering their properties. Applies only to processes where the heating and cooling are performed for specific purposes of altering properties.

Maximum Material Condition

The largest size limit of an external feature and the smallest size limit of an internal feature.

Subtractive Manufacturing

The manufacture of 3D parts by removing (cutting) unwanted material from a block. (machining)

Fusion

The process or result of joining two or more things together to form a single entity.

Adhesion

The property of sticking together (as of glue and wood) or the joining of surfaces of different composition.

Soft Skills

The skills such as customer relations, oral and written communications, dependability, teamwork, and leadership abilities, which are not easily measured, but are nevertheless important in a networking career.

Least Material Condition

The smallest size limit of an external feature and the largest size limit of an internal feature.

Orthographic Projection

The system by which the views of a multi view drawing are arranged in relation to each other. The process of projecting two or more views of an object onto imaginary by drawing lines perpendicularity from the object to the planes.

Surface Area

The total area of the surface of a three-dimensional object.

Gray Iron Castings

Type of cast iron that has a graphite microstructure. Named after its gray color. It is the most common and widely used cast iron. Outer surface turns white when chilled rapidly. Used for engine cylinder blocks, pump housings, electrical boxes, cookware, etc.