問題一覧
1
Dark, heavy lines.
Visible or Object Lines
2
Used to represent the outline or contour of the object being drawn.
Visible or Object Lines
3
Light, narrow, short, dashed lines.
Hidden Lines
4
Shows the outline of a feature that cannot be seen in a particular view.
Hidden Lines
5
Used to help clarify a feature, but can be omitted if they clutter a drawing.
Hidden Lines
6
Hidden lines should always begin and end with a __. Exception: When the hidden line begins or ends at a parallel visible or hidden line.
Dash
7
Should always begin and end with a dash.
Hidden Lines
8
Dashes should join at corners.
Hidden Lines
9
Thin line usually drawn at a 45 degree angle.
Section Lines
10
Indicates the material that has been cut through in a sectional view.
Section Lines
11
Thin line consisting of alternating long and short dashes.
Center Lines
12
Used to represent the center of round or cylindrical features, or the symmetry of a feature.
Center Lines
13
Should start and end with long dashes.
Center Lines
14
Should intersect by crossing either the long dashes or the short dashes.
Center Lines
15
Should extend a short distance beyond the object or feature.
Center Lines
16
Should not end exactly at another line.
Center Lines
17
May be connected within a single view to show that two or more features lie in the same plane.
Center Lines
18
Should not extend through the space between views.
Center Lines
19
Thin lines capped on the ends with arrowheads and broken along their length to provide a space for the dimension numeral.
Dimension Lines
20
They indicate length.
Dimension Lines
21
Thin lines used to establish the extent of a dimension.
Extension Lines
22
Can also be used to show extension of a surface to a theoretical intersection.
Extension Lines
23
for extension lines, begin __ from the object and extend to __ beyond the last dimension.
1.5mm, 3mm
24
They should not cross dimension lines.
Extension Lines
25
Thin lines used to connect a specific note to a feature.
Leader Lines
26
Also used to direct dimensions, symbols, item number and part numbers on a drawing.
Leader Lines
27
Leader Lines are commonly drawn at ___ degrees.
45, 30, 60
28
Has a short shoulder (3-6mm) at one end beginning at the center of the vertical height of text, and a standard dimension arrowhead at the other end touching the feature.
Leader Lines
29
Should not cross each other.
Leader Lines
30
Should not be excessively long.
Leader Lines
31
Should not be vertical or horizontal.
Leader Lines
32
Should not be parallel to dimension lines, extension lines or section lines.
Leader Lines
33
Used to terminate dimension lines and leader lines and on cutting-plane lines and viewing plane lines.
Arrowheads
34
Should be three times as long as they are wide.
Arrowheads
35
Should be the same size throughout the drawing.
Arrowheads
36
Is generally preferred because of its clarity.
Filled Arrowhead
37
Thick broken line that is terminated with short 90 degree arrowheads.
Cutting Plane Lines
38
Shows where a part is metally cut in half to better see the interior detail.
Cutting Plane Lines
39
Are used to break out sections for clarity or for shortening a part.
Break Lines
40
Three types of break lines with different line weights:
Short Break Lines, Long Break Lines, Cylindrical Break Lines
41
Thick wavy line.
Short Break Lines
42
Used to break the edge or surface of a part for clarity of a hidden surface.
Short Break Lines
43
Long, thin lines.
Long Break Lines
44
Used to show that the middle section of an object has been removed so it can be drawn on a smaller piece of paper.
Long Break Lines
45
Thin lines.
Cylindrical Break Lines
46
Used to show round parts that are broken in half to better clarify the print or to reduce the length of the object.
Cylindrical Break Lines
47
Thin lines made up of long dashes alternating with pairs of short dashes.
Phantom Lines
48
Phantom Lines three purposes in drawings:
To show the alternate position of moving parts., To show the relationship of parts that fit together., To show repeated detail.
49
When constructing an orthographic projection, we need to include enough views to completely describe the true shape of the part.
Standard Views
50
= more views
Complex Part
51
= less views
Simple Part
52
Shows the most features or characteristics of the object.
Front View
53
It usually contains the least amount of hidden lines.
Front View
54
Is chosen first and the other views are based on the orientation of the front view.
Front View
55
Is the ratio of the linear dimension of an element of an object shown in the figure
Scale
56
Are created by looking at the object, straight on, in the directions indicated.
6 Principal Views