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40 Cards in this Set
- Front
- Back
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Name the line that shows where a measurement begins and ends.
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dimension line
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the dimensioning system in which the numerals are placed in line with the dimension lines is called the _______ system
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alligned dimensioning
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angles may be dimensioned by degrees, minutes and seconds or by ________ angles
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decimal
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diameter
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O
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inch
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in. or "
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centerline
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CL
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millimeter
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mm
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radius
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R
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tolerance
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TOL
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outside diameter
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OD
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countersink
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CSK or V
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the amount by which the accuracy of a part may vary from the absolute measurement is called _______.
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Tolerance
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Explain the difference between a datum feature and a simulated datum
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Datum feature is any physical portion of a part .the simulated datum is what the datum feature contacts and should imitate the mating part in the assembly.
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The dimension ".500 drill" would be more accurately shown as _________.
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D .5
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On machine drawings, dimensions should be given in _______ inches or in ______ (metric sizes).
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decimal inches or mm
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When a hole is to be made in a piece after assembly with its mating piece, the words ______ are added to the note.
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AT ASSEMBLY
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aligned system
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a system of dimensioning in which the dimensions are placed in line with the dimension lines.
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assembly drawing
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a drawing, usually three-dimensional, in which all the parts of a machine are shown together in their relative positions.
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basic hole system
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a system of specifying dimensions and tolerances of close-fitting cylindrical parts in which the design size of the hole is the basic size and the allowance is applied to the shaft
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basic shaft system
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a system of specifying dimensions and tolerances of close-fitting cylindrical parts in which the design size of the shaft is the basic size and the allowance is applied to the hole
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bilateral tolerance
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a tolerance that allows variations in both directions from a design size. Bilateral variations are usually given with locating dimensions and with any other dimensions that can vary in either direction
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datum
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a point, line, or surface that is assumed to be exact, and from which other dimensions can be computed or located.
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dual dimensioning system
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a dimensioning system in which the size description is given in both decimal inches and millimeters
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finish marks
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a surface texture symbol which shows that a surface is to be machined, or finished.
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tolerance
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the amount by which a machined part is allowed to vary from absolute measurements
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unidirectional system
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a system of dimensiongin in which all the dimensions read from the bottom of the sheet, no matter where they appear on the drawing
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unilateral tolerances
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a tolerance that allows variation on only one side of the design size of a part.
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another name for dimension is
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size description
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The exact position of a specific detail on a drawing is given by a _____ dimension
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location
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A point on a part that is assumed to be exact is a(n)
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datum
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a(n) _______ dimensioning system is sometimes used in industries involved in international trade.
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dual
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to modify the standard dimension style in AutoCAD, the _____ command is used.
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DIMSTYLE
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the total amount a given dimension may vary is the
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tolerance
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tapers can be dimensioned by giving the length, one diamter, and the
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taper in a ratio
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another name for surfare texture symbol is
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finish mark
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half size scale on a drawing can also be specified as
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1:2
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to describe an object completely, a technical drawing needs to define the
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shape and size of the object
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a drawing or set of drawings from which a part or product is manufactured is a(n) _____ drawing.
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working
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when the metric system is used for dimensioning, measurements are generally given in tenths, hundreths, or thousandths of a meter.
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F
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in the aligned system of dimensioning, all dimensions read from the bottom of the sheet.
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F
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