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