Chap 2: Symbolic Lines & Lettering Flashcards
Can be considered to be letters in the language of engineering drawing
Lines
These lines are drawn using two thicknesses, usually specified as thin and thick
Symbolic Lines
Recommended ratio of thickness of lines
2:1
10 Types of Symbolic Lines
- Continuous Thick
- Continuous Thin
- Continuous Thin Freehand
- Continuous Thin (straight) with zigzags
- Dashed Thick
- Dashed Thin
- Thin Chain (long & short dashes) OR (long dashes & dots {L.P.})
- Thin Chain, thick @ ends & direction change OR thick long dashes & dots {L.P.}
- Thick Chain (long sashes & dots)
- Thin Chain, long dashed double dots
A view as it appears when looking from the front
Orthographic View
Recommended angle for sloping letters
75° w/ the horizontal
Lettering usually used for the main titles of ink drawing.
Gothic Letters
To attain uniformity of height, it is a good idea to have ________
Guide Lines
T or F
All letters should be written in capitals.
Lowercase letters should be used only when they are accepted in inter-
national usage for abbreviations (mm, cm, m)
True
T or F
All letters and numerals should
be written in such a manner that
they touch each other or
the lines.
False
> they DO NOT touch each other
T or F
All letters should be written
in such a way that they appear upright from the bottom edge, except when they are used for dimensioning
True
T or F
Letters should be spaced in such a way that the area between them appears unequal
False
> appears EQUAL
T or F
It is not necessary to keep the clearances between adjacent letters equal. For example, letters like H, I, M and N, if adjacent, should be spaced more widely than C, O and Q.
True
T or F
Words should be spaced two letter-widths apart.
False
> ONE letter width apart
