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EDD 131 > Midterm Review > Flashcards

Midterm Review Flashcards

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1
Q

What is an orthographic projection?

A

A single view of an object on a plane, ie. paper, that is perpendicular to both the view and lines of projection.

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2
Q

What are orthographic projections used for?

A

Orthographic projections are used to create multiview drawings.

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3
Q

What are multiview drawings?

A

Multiview drawings are used to describe the exact shape and size of an object.

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4
Q

What is a limit tolerance?

A

A permitted variation from a given dimension or an permissable variation from a given dimension.

When aligned vertically the larger dimension is placed on top.

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5
Q

What are Basic Dimensions?

A

Basic dimensions are dimensions that show only the general size of an object without any limitations.

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6
Q

Define tolerance

A

The permissible amount a dimension can vary in size during manufacturing and construction.

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7
Q

What type of tolerance is this?

A

Limit Tolerancing

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8
Q

Tolerances that allow variation in only one direction

A

Unilateral Tolerancing

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9
Q

Tolerances that indicate a range above and below a specific dimension

A

Plus and Minus Tolerance

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10
Q

Should Tolerances be used on chain dimensioning?

A

No, because chain dimensioning accumulates the entire range of tolerances for the length of the part.

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11
Q

What is a Datum

A

A reference location easy to locate and measure.

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12
Q

What type of symbol is this?

A
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13
Q

What type of symbol is this?

A

Position Symbol

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14
Q

What is this line type?

A

Cutting Plane

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15
Q

What type of view is this?

A

Section View

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16
Q

A Proportion….

A

Expresses the size of an object as a ratio in relation to the objects true size.

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17
Q

What is this a symbol for?

A
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18
Q

What is this a symbol for?

A
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19
Q

Where are large dimensions for limit tolerances placed?

A

Top for verticle tolerances and right for horizontal tolerances.

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20
Q

What type of thread is this s symbol for

A

External Thread

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21
Q

Draw a front and side view of an external thread

A
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22
Q

Define the steps in making a orthographic multiview drawing

A
  1. Choose the number of views needed
  2. Choose the front view.
  3. Draw out your views
  4. Draw center lines
  5. Draw dimensions
  6. Place notes
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23
Q

What is the order of line precedence?

A
  1. cutting plane line
  2. Object line
  3. Center line
  4. Hidden line
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24
Q

Draw the symbol for a surface finish

A
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25
Engineering dimensions are written as inches in .......
Decimal Form
26
How many views are there on a cylindrical object?
Two Views
27
How many orthographic views can there be?
6
28
How many views are there in a third angle orthographic drawing and what are they?
Three and they are top ,bottom, and right side view.
29
What do front views do?
Shows the view that shows the most features and best form of the object.
30
It is okay to dimension to a hidden line. True or False
False
31
It is okay for section views to have hidden lines. True or False
False. Section Views should not contain hidden lines.
32
In a typical section view how much of the object is sectioned out?
Half
33
What portion of a section is removed from a pulley in section view?
A quarter
34
Orthographic Projection uses what kind of angles?
30, 90, 50
35
Receding lines are connected to a.......?
Vanishing Point
36
Define a fillet
The rounded inside edge of an object
37
Define a round
The rounded outer edge of an object
38
Define Basic Dimension
Basic Dimension is the theoretically exact size of an object.
39
Define a reference dimension
A reference dimension is a dimension used for verification only and not for manufacturing a part.
40
All dimensions should be written to the same number of decimal places in English dimensioning. True or False
True
41
A zero is used before the decimal in English dimensioning?
False
42
What is duel dimensioning?
Dimensioning in both English Standard and Metric Units.
43
How many dimensions are always left out in a dimension chain?
One
44
What is the standard lettering height?
1/8"
45
What is the standard fraction height?
1/4"
46
Why are standards important?
So that when designs are made they can be understood and translated by everyone in that field.
47
What is the overriding principle of dimensioning?
So that the object dimensions should be complete, clear and easy to understand.
48
How many Different types of pictorial views are there?
Three, isometric, oblique, and perspective.
49
Define Pictorial Drawings.
Multidimensional drawings that show more than one side of an object.
50
You almost always give what of an object?
Overall Dimension
51
In America what kind of dimension do we use?
Third angle orthographic.
52
What should the dimensions of an arrow be?
Three times longer than they are wide
53
What are perspective drawings?
Drawings that contain receding sides designed to approximate the appearance of an object.
54
What are the four basic types of fasteners?
Counter bore, Counter sink, Spotface, Clearence hole....
55
What are the three different types of perspective drawings?
One, two, and three point perspective drawings
56
What does a station point reperesent?
The location of the observer.
57
What is unidirectional dimensioning?
Dimensions that are all read from the bottom. All dimensions are alligned horozontally with the bottom of the page.
58
what are the four major areas of a floor plan
entery, living area, sleeping area, and service area
59
What is a plot plan?
A map of a large number of properties and surounding streets. similar to a plan view in civil drafting.
60
What is a site plan?
A drawing that describes the physical elements of a **single** piece of property.
61
What is a floor plan?
A two dimensional drawing of all exterior and interior walls.
62
63
What should the spacing between dimensions be?
Equal or 1/4"

EDD 131 (1 decks)

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