Chapter 5

Question 1

Define: Dimension

Answer 1

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

Question 2

Define: Tolerance

Answer 2

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

Question 3

Define: Bilateral vs Unilateral Tolerance

Answer 3

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

Unilateral: Variation allowed one way

Question 4

Define: Measurement

Answer 4

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

Question 5

Define: Accuracy

Answer 5

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

Question 6

Define: Precision

Answer 6

Degree of repeatability in the measurement process.

Question 7

Define: Gaging

Answer 7

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

Question 8

Define: Caliper

Answer 8

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

Question 9

Define: Micrometer

Answer 9

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

Question 10

Define: Nominal Surface

Answer 10

Representing the intended surface contour of the part.

Question 11

Define: Surface Texture

Answer 11

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.

Question 12

Define: Roughness

Answer 12

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

Question 13

Define: Surface Finish

Answer 13

Term denoting smoothness and general quality of a surface.