Alphabet of Lines

Question 1

Every line has a definite meaning, characteristic, use and make-up or construction. These lines are given comventional symbols called?

Answer 1

Alphabet of lines

Question 2

A thick full line which is used to represent all visible edges of objects

Answer 2

Visible line, outline line, object line

Question 3

A medium short dash lines approximately 1/8” in length and 1/32” between lines and are used to represent hidden or unseen edges of objects

Answer 3

Invisible line, hidden line, broken line, dotted line

Question 4

What are the reminders about hidden lines?

Answer 4

1. Should join a visible line, except when it causes a visible line to extend too far; should leave a gap
2. Should intersect to form L or T
3. Should jump a visible line
4. Parallel lines should be drawn so that they are ‘staggered’ in a manner similar to bricklaying
5. When two or more hidden lines meet a point, the dashes should join

Question 5

A thin, fine, dark and solid line with endpoints on both ends (space should be about 2mm away from the object)

Answer 5

Dimension lines

Question 6

What are the types of endpoints?

Answer 6

Simple arrow
Solid arrow
Circle
Slashed

Question 7

A thin line woth long and short dashes drawn alternately which is used to indicate axis of symmetrical objects or features. They should always start and end with long dashes.

Answer 7

Center line

Question 8

A thick line which consists of of alternate long and short dashes, used to represent or show the path of the plane which cuts the object that makes a section. It is clearly identified with reference letters along with arrowheads to show the direction in which the view is taken.

Answer 8

Cutting Plane Line

Question 9

A thin straight line leading from the dimension value or an explanatory note on the feature of the drawing to which the note applies. The inclined portion is usually 45* or 60*

Answer 9

Leader Line (for call-outs/specifications)

Question 10

A thin irregular curved line with arrowheads similar to a leader line. Its function is to give an explanatory note.

Answer 10

Reference Line

Question 11

A visible broken line drawn freehand. It is used to show that the object has been cut.

Answer 11

Short break line

Question 12

A thin line drawn 45* with about 1/16” between the lines which is used to indicate that the object has been cut through where some section pf the view has been removed

Answer 12

Section Cross Hatching line

Question 13

A fine line used as guides for plotting of lines/objects. They are normally drawn in pencil.

Answer 13

Construction/guide lines