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Blueprint Reading for the Machine Trades, Sixth Edition Unit 1:Dictionary of Terms


Blueprint Reading for the Machine Trades, Sixth Edition Unit 1:Dictionary of Terms. Russ Schultz and Larry Smith PowerPoint presentation created by LaVonne Vichlach. Dictionary of Terms. Abrasive A material used to cut other materials softer than itself. Dictionary of Terms. Allowance

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Blueprint reading for the machine trades sixth edition unit 1 dictionary of terms l.jpg

Blueprint Reading for the Machine Trades, Sixth Edition Unit 1:Dictionary of Terms

Russ Schultz and Larry Smith

PowerPoint presentation created by LaVonne Vichlach


Dictionary of terms l.jpg

Dictionary of Terms

Abrasive

A material used to cut other materials softer than itself.


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Dictionary of Terms

Allowance

  • Minimum clearance

  • Or maximum interference

  • Occurs between two mating parts-e.g.. a shaft and a hole


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Dictionary of Terms

Alloy

  • Mixture of two or more elements

  • One is metallic

  • Melt together to form new material


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Dictionary of Terms

Angular Dimension

  • Dimension measured using

    • Degrees

    • Minutes

    • Seconds


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Dictionary of Terms

Anneal

  • Heat treat process

  • Cool heated material slowly

  • Removes stresses

  • Reduces hardness


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Dictionary of Terms

Arbor

  • Shaft that cutting tool is mounted on

  • Spindle that holds a workpiece


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Dictionary of Terms

Assembly Drawing

  • Drawing that shows relationship of components that fit together


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Dictionary of Terms

Auxiliary View

  • Orthographic view projected angularly

  • Shows features appearing on inclined surfaces

  • Shows features appearing on oblique surfaces


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Dictionary of Terms

Axis

  • Central line about which parts are arranged

  • Elements may or may not revolve around it


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Dictionary of Terms

Baseline dimensioning

  • System of dimensioning used to locate features of a part-e.g. holes

  • Uses a common set of datums


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Dictionary of Terms

Basic dimension

  • Exact value of a feature-no tolerance is used

  • Describes the following:

    • Size

    • Location


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Dictionary of Terms

Basic size

  • Exact theoretical size

  • Limits of size are derived from them by

    • Application of allowances

    • Application of tolerances


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Dictionary of Terms

Bevel

  • Flat, slanted surface between two other surfaces

  • Surfaces are at right angles to one another


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Dictionary of Terms

Bilateral

  • “Bi” means two

  • Indicates that two sides are used

  • E.g.---bilateral tolerances


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Dictionary of Terms

Blind hole

  • Hole that does not go through all of the material

  • Common in thick parts


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Dictionary of Terms

Bolt circle

  • Circular centerline

  • Two or more hole centers are located on it


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Dictionary of Terms

Bore

  • Process to enlarge a hole to an accurate size

  • Held to close tolerances

  • Usually specified with limit dimensions


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Dictionary of Terms

Boss

  • Raised cylindrical projection-always circular

  • Provides extra metal around a hole in casting or forging

  • Similar to a pad-pad may be any other shape-function is same-provide more material


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Dictionary of Terms

Broach

  • Process to produce desired shape in cylindrical hole

    • Keyway

    • Hex shape


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Dictionary of Terms

Broach

  • Broaching tool

    • Series of teeth

    • Gradually increasing in size

    • Cutting is done as tool is pushed or pulled through hole


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Dictionary of Terms

Burnish

  • Finish or polish metal

  • Roll or slide a tool over the surface under pressure


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Dictionary of Terms

Burr

  • Jagged edge of metal produced by working the metal

  • Common note of blueprints is to “remove all burrs”


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Dictionary of Terms

Bushing

  • Replaceable insert

  • Provide metal with better wearing quality


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Dictionary of Terms

CAD drawing

  • Drawing created by computer-aided drafting methods

  • Electronically stored, revised and retrieved


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Dictionary of Terms

Cam

  • Mechanical device used to change rotary motion to some other motion

  • Reciprocating or sliding


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Dictionary of Terms

Carburize (CARB.)

  • Heat low-carbon steel to temperature below its melting point

  • Heated in carbonaceous solids, liquids, or gases to raise level of carbon on outside surfaces

  • Cooled slowly


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Dictionary of Terms

Case hardening

  • Hardening of ferrous alloy

  • Surface layer is harder than the interior core


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Dictionary of Terms

Casting

  • Metal object-e.g.-cast iron, cast aluminum

  • Pour molten metal into a mold


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Dictionary of Terms

Chain dimensioning

  • Successive dimensions extend from one feature to another

  • Each dimension does not have to originate from a datum

  • Tolerances accumulate with a chain dimension


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Dictionary of Terms

Chamfer

  • Corner removed from end of cylindrical surface

  • At an angle to face

  • Used to facilitate assembly


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Dictionary of Terms

Clearance hole

  • Hole slightly larger than bolt or fastener

  • Bolt or fastener passes through it freely

  • Permits easy assembly


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Dictionary of Terms

Coaxiality

  • Exists when two or more cylindrical features have a common axis

  • Two diameters on a shaft

  • Bore in a round part


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Dictionary of Terms

Collar

  • Projecting ring around a shaft

  • Can be used to locate components on an arbor


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Dictionary of Terms

Concentricity

  • Condition where median points of a feature’s diametrically opposed elements are located within a cylindrical zone

  • Cylindrical zone is equally centered about a datum axis


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Dictionary of Terms

Core

  • Part of a mold

  • Shapes the interior of a casting

  • Sand is major component


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Dictionary of Terms

Counterbore

  • Process to enlarge a hole cylindrically at the end

  • Drawing specification includes:

    • Diameter

    • Depth of enlarged section


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Dictionary of Terms

Countersink

  • Process to enlarge a hole conically at end

  • Accept a flathead fastener

  • Drawing specifications will include its diameter and included angle


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Dictionary of Terms

Datum

  • Location of other features is established using them

  • A datum can be:

    • A point

    • A line

    • A surface

    • A plane


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Dictionary of Terms

Degree

  • Unit of angular measurement

  • 360 degrees in a full circle


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Dictionary of Terms

Detail drawing

  • Drawing of a single object completely dimensioned

  • All information necessary to produce part is on print


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Dictionary of Terms

Die (multiple definitions)

  • Tool used to cut external threads

  • Tool used to:

    • Shape metal

    • Mold metal

    • Stamp metal

    • Cut metal


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Dictionary of Terms

Die castings

  • Metal object produced by injecting material into metal dies

  • Material injected into mold under pressure


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Dictionary of Terms

Draft

  • Angle provide on pattern or mold

  • Enables easy removal of finished cast or molded part from tooling


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Dictionary of Terms

Eccentric

  • Term means off center

  • Eccentric diameters do not share a common axis


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Dictionary of Terms

Extrusion

  • Part produced can be a metal object

  • Process forces hot metal through dies of desired shape


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Dictionary of Terms

Face

  • Lathe term-machine flat surface perpendicular to the axis of part

  • E.g.-the end of a shaft


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Dictionary of Terms

Fastener

  • Connector used to secure two or more parts together

  • Fastener examples:

    • Bolts

    • Nuts

    • Screws

    • Rivets


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Dictionary of Terms

Ferrous

  • Metals containing iron as their base

  • E.g.—steel, cast iron


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Dictionary of Terms

Fillet

  • Concave surface (interior radius)

  • At intersection of two surfaces of an object


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Dictionary of Terms

Fin

  • Thin projecting edge on cast or molded part

  • Common in castings and produced where mold halves come together


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Dictionary of Terms

Finish marks

  • Symbols appearing on edge view of surfaces to be machined

  • Usually found on drawings of castings and forgings


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Dictionary of Terms

Fixture

  • Device designed to position and hold a part in a machine tool

  • Does not guide cutting tool

  • References part to tool


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Dictionary of Terms

Flame hardening

  • Process of hardening steel

  • Can use Oxyacetylene torch and quench material in quenching medium


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Dictionary of Terms

Flange

  • Projecting rim or collar on an object

  • May include mounting holes to secure it in place


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Dictionary of Terms

Forge

  • Force hot metal into a desired shape

  • Process includes hammering or squeezing


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Dictionary of Terms

Gauge

  • The thickness of sheet metal or the diameter of wire

  • Designated by number rather than a dimension


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Dictionary of Terms

Geometric tolerancing

  • Tolerances on drawings

  • Emphasis on:

    • Actual function or relationship of part features

    • Interchangeability is critical


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Dictionary of Terms

Gusset

  • Angular piece of metal

  • Fastened in angle of metal frame to strengthen or add stiffness


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Dictionary of Terms

Hardness test

  • Measures degree of hardness of metals

  • Uses numerical values for hardness


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Dictionary of Terms

Heat treatment

  • Application of heat to metals

  • Produces a variety of desired properties depending on type of heat treat


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Dictionary of Terms

Horizontal

  • Parallel to the horizon

  • Machine tool can be describe by this term-e.g.-horizontal mill


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Dictionary of Terms

Hub

  • Central part of a wheel

  • Part into which spokes are inserted


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Dictionary of Terms

Inclined surface

  • Flat surface slanting in one direction

  • Appears as an edge in one principal view

  • Appears distorted in others


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Dictionary of Terms

Included angle

  • Angle formed between one side and another

  • Always less than 180 °


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Dictionary of Terms

Isometric drawing

  • Three-dimensional pictorial drawing

  • Horizontal surfaces drawn on 30° axes from horizontal


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Dictionary of Terms

Jig

  • Device used to hold a part to be machined

  • Positions and guides cutting tool


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Dictionary of Terms

Key

  • Metal bar or wedge

  • Secures gears or pulleys to shaft

  • Prevents rotary motion between two pieces


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Dictionary of Terms

Keyseat

  • An axially located groove in a shaft

  • Positions the key


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Dictionary of Terms

Keyway

  • An axially located groove in a hub

  • Positions the key


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Dictionary of Terms

Lap

  • Produce finished surface

  • Uses soft metal impregnated with a fine abrasive powder


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Dictionary of Terms

Least material condition

  • Minimum amount of material is present

  • Maximum hole size

  • Smallest shaft size

  • LMC


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Dictionary of Terms

Limits

  • Maximum and minimum permissible dimensions

  • Arrive at by applying tolerances to basic dimensions


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Dictionary of Terms

Linear dimension

  • A dimension measured in a straight line

  • Most common of dimensions on part prints


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Dictionary of Terms

Maximum material condition

  • Maximum amount of material is present

  • Smallest hole diameter

  • Largest shaft size

  • MMC


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Dictionary of Terms

Neck

  • External groove in a cylindrical piece

  • Change in diameter

  • Usually generated where another part fits against a shoulder


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Dictionary of Terms

Nominal size

  • Term used for purposes of general identification

  • E.g.—3/4-in. plate or 1-in. pipe


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Dictionary of Terms

Nonferrous

  • Metals that do no contain iron

  • E.g.-

    • Brass

    • Bronze

    • aluminum


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Dictionary of Terms

Normalizing

  • Process of heating steel

  • Cool in still air to room temperature

  • Restore uniform grain structure and relieves internal stresses


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Dictionary of Terms

Oblique surface

  • Flat surface slanting in two directions

  • Will appear distorted in all principal views


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Dictionary of Terms

Orthographic projection

  • Process of projecting essential views of three-dimensional object onto flat plane

  • Used to generate machinist’s blueprints


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Dictionary of Terms

Pad

  • Raised projection on a casting

  • Provides extra metal around series of holes or a slotted hole


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Dictionary of Terms

Parallel

  • Extending in the same direction-e.g.-two lines

  • Equidistant at any point

  • Lines do not meet


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Dictionary of Terms

Pattern

  • Model made of wood, metal, or other material

  • Used to form a cavity in sand for pouring castings


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Dictionary of Terms

Perpendicular

  • Being at a right angle to a given line or plane

  • Or 90° to a given line or plane


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Dictionary of Terms

Pickle

  • Process to remove stains or oxide from parts

  • Parts immersed in an acid solution


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Dictionary of Terms

Pinion

  • In a gear assembly

  • The smaller of the two mating gears


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Dictionary of Terms

Pitch

  • Distance from a point on a thread to a corresponding point on next adjacent thread

  • Measured parallel to the axis to the thread


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Dictionary of Terms

Profile view

  • View that most clearly illustrates shape of a feature is considered profile view

  • With hole-it is view which shows it is round


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Dictionary of Terms

Quenching

  • Cool metal rapidly

  • Immerse in water or oil


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Dictionary of Terms

Radius

  • Distance from center of circle or an arc to its circumference

  • Equal to hone half of a diameter

  • Plural of radius is radii


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Dictionary of Terms

Ream

  • Machine operation to enlarge a hole slightly

  • Use rotating fluted tool

  • Provides greater accuracy and better finish


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Dictionary of Terms

Reciprocation

  • A straight-line, back and forth motion

  • Move in alternate directions


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Dictionary of Terms

Reference dimension

  • Used only for information purposes

  • Does not receive standard print tolerances

  • Should not be used for production or inspection


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Dictionary of Terms

Regardless of feature size

  • Condition where tolerance of position must be met irrespective of where the feature lies within size tolerance

  • RFS-is understood and never seen on a part print


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Dictionary of Terms

Relief

  • Amount one plane surface sits below another plane

  • Usually provides clearance


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Dictionary of Terms

Rib

  • A relatively thin flat member

  • Acts as a brace or support


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Dictionary of Terms

Round

  • A convex surface (exterior radius)

  • At the intersection of two surfaces of a casting or forging


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Dictionary of Terms

Scale

  • Refers to relative size of drawing and size of part

  • First number represents size of drawing

  • Second number represents size of part

  • Dimensions always represent size of part-not the print


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Dictionary of Terms

Section

  • Interior view of an object

  • Drawn to expose features not otherwise visible


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Dictionary of Terms

Serrated

  • Surface or edge having notches or sharp teeth

  • Aids in cutting


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Dictionary of Terms

Shim

  • Thin piece of metal or other material

  • Placed between two marts to adjust the fit, level a part, etc.

  • Plastic shims are also used


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Dictionary of Terms

Shoulder

  • Plane surface on a shaft

  • Normal to the axis

  • Formed by a different diameter


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Dictionary of Terms

Spline

  • A raised area on a shaft (external) or hub (internal) parallel to the axis

  • Designed to fit into a recessed area of a mating part


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Dictionary of Terms

Spotface

  • A process used to machine a round diameter on a rough surface

  • Found in castings around a hole

  • Provides good seating surface to nut or for head of bolt


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Dictionary of Terms

Springs

  • Helical

  • Flat


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Dictionary of Terms

Helical springs

  • Compression-supply force when compressed-either in hole or around rod

  • Extension-Supplies force when extended-pulled from end to end-has hooks on each end

  • Torsion-Designed to resist twisting or rotary motion-hooks or projections for connections


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Dictionary of Terms

Stud

  • Round piece of metal

  • Threaded on both ends


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Dictionary of Terms

Surface roughness

  • Refers to finely spaced irregularities produced in fabricating a part

  • Height of irregularities is rated in microinches or micrometers


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Dictionary of Terms

Symmetrical

  • Same on each side

  • Equal halves

  • Centerline usually indicates symmetry


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Dictionary of Terms

Tabular dimensioning

  • Type of dimensioning where letters are substituted for dimensions

  • Dimensions are listed in a table on a drawing

  • Permits more than one part to appear on the same drawing


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Dictionary of Terms

Tangent

  • Line drawn to the surface of an arc or circle

  • Contacts the arc or circle at only one point


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Dictionary of Terms

Tap

  • A tool for cutting threads in a hole

  • Hole is usually drilled to a particular size for threading operation


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Dictionary of Terms

Taper

  • Conical shape that permits shaft or hole to become gradually smaller at one end.

  • Common application is tapered shank tools for machining centers


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Dictionary of Terms

Temper

  • Change the physical characteristics of hardened steel

  • Reheat to intermediate temperature range to toughen steel

  • Also has softening effect


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Dictionary of Terms

Template

  • Thin sheet used as a guide

  • Contains the form and shape of piece to be made


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Dictionary of Terms

Tolerance

  • Permissible variation from a given dimension

  • Unilateral, bilateral


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Dictionary of Terms

Triangle

  • Three sides figure

  • 180° in a triangle


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Dictionary of Terms

Typical

  • Term used with drawing to indicate that all similar undimensioned features are same

  • Have same dimensions as the feature marked TYP (or typical)


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Dictionary of Terms

Undercut

  • Groove cut on inside of another cut

  • Hole is an example


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Dictionary of Terms

Unilateral

  • Having only one

  • Having only one side

  • Tolerances can be unilateral


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Dictionary of Terms

Upset

  • To strike a piece of metal until it becomes greater in its cross section

  • Hammer metal into different shapes


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Dictionary of Terms

Vertical

  • Perpendicular to the horizon

  • 90° from the horizontal plane


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Dictionary of Terms

Woodruff key

  • Flat key, semicircular in shape

  • Two basic dimensions coded into the key number


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Dictionary of Terms

Woodruff key

  • Last two digits indicate diameter in 1/8ths of an inch

  • Preceding two digits designate width in 1/32nds of an inch


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Terminology Quiz 1

  • A machining operation that produces a round, flat spot around a hole. Abbreviated SF

Spotface


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Terminology Quiz 1

  • A machining operation that uses a toothed cutting tool to produce shapes inside of a hole, such as a keyway.

Broach


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Terminology Quiz 1

  • The plural of radius.

Radii


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Terminology Quiz 1

  • The term that mean two sides are involved.

Bilateral


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Terminology Quiz 1

  • A tool used for cutting internal threads in a hole.

Tap


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Terminology Quiz 1

  • Two lines equidistant from each other, extending in the same direction.

Parallel


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Terminology Quiz 1

  • The term that describes two lines or planes that are at right angles to one another.

Perpendicular


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Terminology Quiz 1

  • A line drawn to an arc that contacts the arc at one point only, without crossing.

Tangent


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Terminology Quiz 1

  • The thickness of steel metal by a number rather than a dimension.

Gauge


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Terminology Quiz 1

  • A shaft or spindle for holding the cutting tool or workpiece.

Arbor


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Terminology Quiz 1

  • A thin piece of metal inserted between two parts to adjust the fit.

Shim


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Terminology Quiz 1

  • The smaller of two mating gears.

Pinion


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Terminology Quiz 1

  • A hole slightly larger than the fastener intended to pass through it.

Clearance Hole


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Terminology Quiz 1

  • A projecting rim or collar used to attach another object.

Flange


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Terminology Quiz 1

  • A flat surface perpendicular to the axis, such as the end of a shaft.

Face


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Terminology Quiz 1

  • A point, line, or surface from where other features are located.

Datum


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Terminology Quiz 1

  • A spring designed to supply force when pulled end to end.

Extension Spring


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Terminology Quiz 1

  • The cooling of metals rapidly by immersing them in a liquid.

Quenching


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Terminology Quiz 1

  • A dimension used only for information, not for production or inspection.

Reference Dimension


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Terminology Quiz 1

  • A drawing made by computer-aided drafting methods.

CAD Drawing


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Terminology Quiz 2

  • A machining operation that enlarges the end cylindrically to a specified diameter and depth.

Counterbore


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Terminology Quiz 2

  • A machining operation that produces a cone-shaped end to a hole, usually to accept a flat-head fastener.

Countersink


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Terminology Quiz 2

  • The permissible variation from a specified dimension.

Tolerance


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Terminology Quiz 2

  • The maximum and minimum permissible dimensions.

Limits


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Terminology Quiz 2

  • A tool for cutting external threads.

Die


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Terminology Quiz 2

  • Cylindrical surfaces that are equally centered about a common axis

Coaxiality


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Terminology Quiz 2

  • Equal halves. The same on both sides of a common centerline.

Symmetrical


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Terminology Quiz 2

  • A circular centerline upon which two or more hole centers are located.

Bolt Circle


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Terminology Quiz 2

  • An object made by pouring molten metal into a mold.

Casting


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Terminology Quiz 2

  • A model of the part to be cast. Used to create a cavity in the sand.

Pattern


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Terminology Quiz 2

  • An interior radius (concave) between intersecting surfaces of an object.

Fillet


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Terminology Quiz 2

  • A circular, raised portion around a hole in a casting or a forging.

Boss


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Terminology Quiz 2

  • Metals that contain iron as their base material, such as steel.

Ferrous


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Terminology Quiz 2

  • Metals without iron content, such as brass, copper, or aluminum.

Non Ferrous


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Terminology Quiz 2

  • Conical shape that permits a shaft or hole to become gradually smaller from one end to the other.

Taper


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Terminology Quiz 2

  • To remove a small amount of material from the end of a shaft or hole to facilitate assembly.

Chamfer


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Terminology Quiz 2

  • A groove in a shaft to position a key.

Keyseat


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Terminology Quiz 2

  • An external groove at a change in diameter of a shaft, usually for another part to fit against its shoulder.

Neck


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Terminology Quiz 2

  • The term used to define the angle formed between one side and another.

Included angle


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Terminology Quiz 2

  • The minimum clearance ( or maximum interference) between two mating parts, such as a shaft and a hole.

Allowance


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Abbreviation Quiz 1

  • CI

Cast Iron


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Abbreviation Quiz 1

  • CRS

Cold Rolled Steel


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Abbreviation Quiz 1

  • CBORE

Counterbore


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Abbreviation Quiz 1

  • CSK

Countersink


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Abbreviation Quiz 1

  • DIA

Diameter


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Abbreviation Quiz 1

  • DR

Drill/Drill Rod


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Abbreviation Quiz 1

  • FIL

Fillet


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Abbreviation Quiz 1

  • FAO

Finish All Over


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Abbreviation Quiz 1

  • GA

Gage


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Abbreviation Quiz 1

  • HRS

Hot Rolled Steel


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Abbreviation Quiz 1

  • ID

Inside Diameter


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Abbreviation Quiz 1

  • LH

Left Hand


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Abbreviation Quiz 1

  • MATL

Material


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Abbreviation Quiz 1

  • MAX

Maximum


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Abbreviation Quiz 1

  • OD

Outside Diameter


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Abbreviation Quiz 1

  • SECT

Section


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Abbreviation Quiz 1

  • STL

Steel


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Abbreviation Quiz 1

  • THK

Thick


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Abbreviation Quiz 1

  • THD

Thread


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Abbreviation Quiz 1

  • TOL

Tolerance


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Abbreviation Quiz 2

  • BC

Bolt Circle


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Abbreviation Quiz 2

  • BHN

Brinell Hardness Number


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Abbreviation Quiz 2

  • CHAM

Chamfer


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Abbreviation Quiz 2

  • CDS

Cold-Drawn Steel


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Abbreviation Quiz 2

  • DIM.

Dimension


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Abbreviation Quiz 2

  • FIN.

Finish


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Abbreviation Quiz 2

  • GRD

Grind


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Abbreviation Quiz 2

  • HT TR

Heat Treat


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Abbreviation Quiz 2

  • LG

Length, Long


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Abbreviation Quiz 2

  • MI

Malleable Iron


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Abbreviation Quiz 2

  • MIN

Minimum, Minute


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Abbreviation Quiz 2

  • NTS

Not to Scale


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Abbreviation Quiz 2

  • PC

Piece, Pitch Circle


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Abbreviation Quiz 2

  • RM

Ream


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Abbreviation Quiz 2

  • REF

Reference


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Abbreviation Quiz 2

  • RND

Round


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Abbreviation Quiz 2

  • SCR

Screw


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Abbreviation Quiz 2

  • SPEC

Specification


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Abbreviation Quiz 2

  • SYM

Symmetrical


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Abbreviation Quiz 2

  • TYP

Typical


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Alphabet of Lines

Visible line

  • Represents visible edges

  • Represents outlines of the object being drawn


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Alphabet of Lines

Hidden line

  • Represents edges not visible in given view

  • Represents outlines of an object not visible in given view


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Alphabet of Lines

Section lines

  • Appear only on a sectional view

  • Appears where surface has been cut

  • Normally drawn diagonally


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Alphabet of Lines

Centerline

  • Indicates symmetry, center points, or axes

  • Consists of alternate long and short dashes


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Alphabet of Lines

Dimension line

  • Denotes the extent of the dimension

  • Use with arrowheads


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Alphabet of Lines

Extension line

  • Extends surface or point away from view

  • Used for the purpose of dimensioning


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Alphabet of Lines

Leader

  • Drawn diagonally

  • Directs a dimension or note to an area

  • Normally terminates with an arrow

  • May terminate with a dot


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Alphabet of Lines

Cutting-plane line

  • Shows where imaginary cutting creates a sectional view

  • May be series of long dashes or alternately two short dashes between single long dashes

  • Arrowheads indicate the direction of sight


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Alphabet of Lines

Viewing-plane line

  • Used in conjunction with removed views to show where view would normally appear

  • Arrowheads indicate direction of sight


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Alphabet of Lines

Short break line

  • Terminates a view to conserve space and avoid congestion

  • Separates internal and external features with broken-out sections


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Alphabet of Lines

Long break line

  • Allows removal of a long central portion of an object to shorten a view

  • Normally used in pairs


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Alphabet of Lines

Phantom line

  • Represents the outline of an adjacent part

  • Shows alternate position of a given part


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Alphabet of Lines

Phantom line

  • Replaces repetitive detail-e.g.-coils, gear teeth, threads

  • Drawn with two short dashes between single long dashes

  • Lines are thinner than the cutting/viewing-plane line


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Alphabet of Lines

Chain line

  • Used to indicate an area or portion of a surface

  • Surface receives special treatment


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Alphabet of Lines


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Alphabet of Lines

  • Drawn parallel to surface profile at a short distance from it

  • Dimensions added for length and location


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Alphabet of Lines

  • Dimensions omitted when chain line clearly indicates location and extent of surface


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Alphabet of Lines Quiz 1

  • Shows the outline of the object.

Answer: Visible


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Alphabet of Lines Quiz 1

2. Indicates the place from where the removed view is viewed.

Answer: Viewing-Plane


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Alphabet of Lines Quiz 1

3. Points diagonally to an area or a feature.

Answer: Leader


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Alphabet of Lines Quiz 1

4. Represents a surface not visible in the view drawn.

Answer: Hidden


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Alphabet of Lines Quiz 1

5. Shows an alternate position of the movable arm.

Answer: Phantom


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Alphabet of Lines Quiz 1

6. Terminates with arrowheads and encloses a dimension figure.

Answer: Dimension


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Alphabet of Lines Quiz 1

7. Extends the visible line for the purpose of dimensioning to it.

Answer: Extension


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Alphabet of Lines Quiz 1

8. Indicates the place where the section is cut.

Answer: Cutting-Plane


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Alphabet of Lines Quiz 1

9. Shows the axis of symmetrical parts and the arm’s path of motion.

Answer: Center


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Alphabet of Lines Quiz 1

10. Permits the use of a partial view to conserve space and avoid congestion.

Answer: Break


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Alphabet of Lines Quiz 1

11. Represents the exposed surface of a sectioned feature.

Answer: Section


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Alphabet of Lines Quiz 1

12. List the five lines that are drawn thick.

Answers:

  • Visible

  • Cutting-Plane

  • Viewing-Plane

  • Short Break

  • Chain


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Alphabet of Lines Quiz 1

13. List the six lines that include short dashes.

  • Hidden

  • Center

  • Cutting-Plane

  • Viewing-Plane

  • Phantom

  • Chain

Answers:


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Alphabet of Lines Quiz 1

14. List the four lines that include arrowheads.

Answers:

  • Dimension

  • Leader

  • Cutting-Plane

  • Viewing-Plane


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Alphabet of Lines Quiz 1

15. How does the cutting-plane line differ from the viewing–plane line (in application)?

Answer:

  • The Cutting-Plane cuts the object

  • The Viewing-Plane views the object


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

1. Viewing-Plane


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

2. Extension


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

3.Dimension


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

4. Center


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

5. Hidden


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

6. Short Break


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

7. Cutting-Plane


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

8. Visible


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

9. Center


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

10. Leader


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

11. Section


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Alphabet of Lines Quiz 2

List the proper names of the lines used in the illustration.

12. Phantom


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Centerline

Chain line

Cutting-plane line

Dimension line

Extension line

Hidden line

Leader

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Visible line

Alphabet of Lines Quiz 3

Match the lines with their correct names.

1. Leader


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Centerline

Chain line

Cutting-plane line

Dimension line

Extension line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Visible line

Alphabet of Lines Quiz 3

Match the lines with their correct names.

2. Extension


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Alphabet of Lines Quiz 3

Centerline

Chain line

Cutting-plane line

Dimension line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Visible line

Match the lines with their correct names.

3. Dimension


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Alphabet of Lines Quiz 3

Centerline

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Visible line

Match the lines with their correct names.

4. Visible


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Alphabet of Lines Quiz 3

Centerline

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Match the lines with their correct names.

5. Centerline


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Alphabet of Lines Quiz 3

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Section line

Short break line

Viewing-plane line

Match the lines with their correct names.

6. Section


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Alphabet of Lines Quiz 3

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Short break line

Viewing-plane line

Match the lines with their correct names.

7. Short Break


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Alphabet of Lines Quiz 3

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

Viewing-plane line

Match the lines with their correct names.

8. Viewing-Plane


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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Chain line

Cutting-plane line

Hidden line

Long break line

Phantom line

9. Chain


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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Cutting-plane line

Hidden line

Long break line

Phantom line

10. Cutting-Plane


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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Hidden line

Long break line

Phantom line

11. Long Break


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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Hidden line

Phantom line

12. Hidden


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Alphabet of Lines Quiz 3

Match the lines with their correct names.

Phantom line

13. Phantom


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A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

F-Hidden line

G-Leader

H-Long break line

I-Phantom line

J-Section line

K-Short break line

L-Viewing-plane line

M-Visible line

Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

1. L-Viewing-plane line


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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

F-Hidden line

G-Leader

H-Long break line

I-Phantom line

J-Section line

K-Short break line

M-Visible line

Match letters from the list with numbers in the illustration.

2. M-visible line


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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

F-Hidden line

G-Leader

H-Long break line

I-Phantom line

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

3. F-Hidden line


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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

G-Leader

H-Long break line

I-Phantom line

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

4. I-Phantom line


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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

G-Leader

H-Long break line

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

5. H-Long break line


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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

C-Cutting-plane line

D-Dimension line

E-Extension line

G-Leader

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

6. C-Cutting-plane line


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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

D-Dimension line

E-Extension line

G-Leader

J-Section line

K-Short break line

Match letters from the list with numbers in the illustration.

7. K-Short break line


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Alphabet of Lines Quiz 4

A-Centerline

B-Chain line

D-Dimension line

E-Extension line

G-Leader

J-Section line

Match letters from the list with numbers in the illustration.

8. B-Chain line


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Alphabet of Lines Quiz 4

A-Centerline

D-Dimension line

E-Extension line

G-Leader

J-Section line

Match letters from the list with numbers in the illustration.

9. D-Dimension line


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Alphabet of Lines Quiz 4

A-Centerline

E-Extension line

G-Leader

J-Section line

Match letters from the list with numbers in the illustration.

10. E-Extension line


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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

G-Leader

J-Section line

11. G-Leader


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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

J-Section line

12. A-Centerline


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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

J-Section line

13. J-Section line


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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

J-Section line

14. A-Centerline


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Alphabet of Lines Quiz 4

Match letters from the list with numbers in the illustration.

A-Centerline

J-Section line

15. J-Section line