Chapter 5 Flashcards Preview

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Flashcards in Chapter 5 Deck (13):

Define: Dimension

Linear or angular sizes of components specified on the part drawing.


Define: Tolerance

Since it is nearly impossible and costly to make components to exact drawing dimensions, this is the limited variation allowed while maintaining proper functionality. Difference between the max and min limits


Define: Bilateral vs Unilateral Tolerance

Bilaterial: Variation allowed both ways (positive and negative).

Unilateral: Variation allowed one way


Define: Measurement

Procedure in which an unknown quantity is compared with a known standard


Define: Accuracy

Degree in which the measured value agrees with the true value of the quantity of interest.


Define: Precision

Degree of repeatability in the measurement process.


Define: Gaging

(or Gauging); Determines simply whether the part characteristic meets or does not meet the design specification.


Define: Caliper

Consists of two legs joined by a hinge to measure the length or width of an object.


Define: Micrometer

Measuring device that consists of a spindle and C-shaped anvil.


Define: Nominal Surface

Representing the intended surface contour of the part.


Define: Surface Texture

On the exterior of a part, the surface topography that is generally not straight and sooth. The way in which the surface roughness, waviness, and flaws combine in patterns and directions are included in the surface texture.


Define: Roughness

Refers to the small, finely spaced deviations from the nominal surface that are determined by the material characteristics


Define: Surface Finish

Term denoting smoothness and general quality of a surface.