unit 1

Question 1

object line

Answer 1

thick solid line // to show the shape of a part

Question 2

hidden line

Answer 2

broken medium line //to show edges that are not visible

Question 3

center line

Answer 3

broken line with short and long dashes // to show center of circles

Question 4

extension and dimension line

Answer 4

extensions come off the part edges, dimensions are inbetween with arrowheads // used to show dimensions of parts

Question 5

leader line

Answer 5

fine and straight line with an arrowhead or ball on the end // points directly to a surface for instruction

Question 6

cutting and plane line

Answer 6

to show where a part has been cut through to show internal views

Question 7

break line

Answer 7

to show a section with conserving blueprint space

Question 8

pictorials

Answer 8

shows a part in a full 3d render

Question 8

oblique pictorial

Answer 8

shows front, top and left or right (in 45 degree)

Question 9

isometric pictorial

Answer 9

shows front, top and left or right. (in 30 degree)

Question 10

orthographic projections

Answer 10

only 3 views given (front, top and side)