Deck 44: Pictorial Drawings and Dimensions

Question 1

How are dimension, notes, and technical details lettered in unidirectional dimensioning?

Answer 1

Dimensions, notes, and technical details are lettered vertically in unidirectional dimensioning.

Question 2

Describe pictorial dimensioning rules.

Answer 2

Essentially, the same basic rules for dimensioning a pictorial sketch are followed as for a multiview drawing. The basic pictorial dimensioning rules apply to both the aligned and unidirectional dimensioning systems.
STEP 1 Dimension and extension lines are drawn parallel to the pictorial planes.
STEP 2 Dimensions are placed on visible features whenever possible.
STEP 3 Arrowheads lie in the same plane as extension and dimension lines.
STEP 4 Notes and dimensions are lettered parallel with the horizontal plane. Because a pictorial drawing is a one-view drawing, it is not always possible to avoid dimensioning on the object, across dimension lines, or on hidden surfaces. Effort should be made to avoid these practices. This will prevent errors in reading dimensions or interpreting particular features of the part(s).

Question 3

The accompanying figure illustrates a(n) ____ dimensioning.

A) unidirectional
B) bidirectional
C) aligned
D) circular

Answer 3

A

Question 4

Why are freehand pictorial drawings used in industries, engineering, design, sales and other organizations?

Question 5

The accompanying figure illustrates a ____ dimensioning.

A) cutting plane
B) pictorial plane
C) hidden plane
D) perspective plane

Question 6

In the aligned or pictorial plane dimensioning system, the dimension lines, extension lines, and certain arrowheads are positioned ____ to the pictorial planes.

A) perpendicular
B) adjacent
C) parallel
D) at an acute angle

Question 7

When is a pictorial drawing considered a working drawing?

Question 8

List the two general systems of dimensioning pictorial sketches.