Deck 15: Dimensioning Large Arcs and Base Line Dimensions

Question 1

Describe how inches are stated in drawings.

Answer 1

Dimensions under 72 inches are usually stated in inches, so the inch symbol may be omitted on a drawing. This applies primarily to manufacturing industries. By comparison, measurements for structural work and the building industry are usually given in feet and inches.

Question 2

Explain how the center line is used in the accompanying figure.

Answer 2

The center line is used as a base line.

Question 3

In base line dimensioning, all measurements are made from common finished surfaces called base lines or ____ lines.

A) relative
B) connection
C) dimension
D) reference

Answer 3

D

Question 4

Dimensions under ____ inches are usually stated in inches so the inch symbol may be omitted on a drawing.

A) 36
B) 48
C) 72
D) 80

Question 5

Measurements for ____ and the building industry are usually given in feet and inches.

A) manufacturing industries
B) structural work
C) mass production
D) research

Question 6

When the center of an arc falls outside the limits of the drawing, a(n) ____ line is used.

A) broken dimension
B) hidden dimension
C) displaced dimension
D) continuous dimension

Question 7

Describe why base line dimensions are desirable on a drawing.

Question 8

In the accompanying figure, item number 1 represents a(n) ____.

A) center that falls outside the object
B) broken dimension line
C) relative reference
D) detached dimension line

Question 9

In the accompanying figure, explain how the horizontal and vertical dimensions are measured.

Question 10

Explain when a broken dimension line is used.

Question 11

____ line dimensions simplify the reading of a drawing and also permit greater accuracy in making the part.

A) Staggered
B) Relative
C) Circle
D) Base

Question 12

____ line dimensioning is used when accurate layout work to precision limits is required.

A) Staggered
B) Relative
C) Base
D) Circle

Question 13

Explain why errors are not cumulative in base line dimensioning.