Sheet Metal 2nd Year > Pattern Development > Flashcards

Pattern Development Flashcards

(47 cards)

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1
Q

How many views are required to perform parallel line development?

A

2

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2
Q

What type of line is drawn in construction weight and is used to project element lines from one view to another?

A

Projection Lines

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3
Q

How many spaces are typically used when dividing a plan view into equal parts?

A

12

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4
Q

What needs to be constructed before the stub pattern can be developed?

A

Miter line

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5
Q

What view is used to lay out a hole pattern?

A

Elevation view

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6
Q

What shortcut can be used if the top and bottom halves of a view are identical?

A

Half plan view

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7
Q

Another name for the length of a pattern?

A

Stretchout

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8
Q

What method do we use in PD to divide the strethout into 12 equal spaces?

A

Sloped rule method

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9
Q

What is the name given to the actual length of a line usually found in elevation view?

A

True length line

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10
Q

A pattern without any allowances is called?

A

A Net pattern

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11
Q

A pattern with allowances added is called?

A

A Gross pattern

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12
Q
Using stub pattern A, locate the seam position
A

4 or 10

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13
Q
If you were using the following method, what would you be developing?
A

Hole pattern

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14
Q

What type of Tee would this hole pattern be for?

A

On Center

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15
Q
Stub pattern inside or outside?
A

Inside

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16
Q
Stub pattern inside or outside?
A

Outside

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17
Q
Stub inside or outside?
A

Inside

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18
Q
Stub inside or outside?
A

Inside

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19
Q

A point on the stretchout that represents the distance between element points from plan view

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A

Step off distance

20
Q

The line where 2 parts of an object meet, usually at an angle

21
Q

Names used to identify extra element points related to another point are called?

22
Q

What determines the material thickness of pipe tees?

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A

Engineer’s specifications

23
Q

What common angles do shops and suppliers often stock for tees?

Study These Flashcards
A
  • 30°
  • 45°
  • 60°
  • 90°
24
Q

What are the two types of intersections for tees?

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A
  • On-centre
  • Off-centre
25
How are tees described?
By stating the tee stub size and then the main branch size
26
In the example '4 on 6 tee', what does '4' represent?
Tee stub size
27
How do you calculate the pipe stub stretchout?
Pi x Diameter (Pi = 3.14 at SAIT)
28
Fill in the blank: One of the most common tees used in the sheet metal trade is the _______.
*on center pipe tee*
29
When laying out a Y stub pattern is it necessary to have A. Just the side elevation B. Both side and end views C. Just the end view D. The plan view and the hole pattern
B. Both the side and end views
30
Hole pattern spacing around the main cylinder is taken from what view?
End view
31
Extend element lines from __________ view to develop the hole pattern. A. Side elevation view B. End view C. Plan view D. Left side view
A. Side elevation view
32
A
33
Point DZ corresponds with A. 1 and 7 B. 1, 4 and 7 C. 1 D. 7
D. 7
34
If the stubs seam was located at HA the correct pattern would be letter?
None of these would work
35
If the stub has the same diameter as the pipe, will the stepped off distance for the hole pattern be A. Unequal B. Equal C. Same as the circumference D. Same as the diameter
B. Equal
36
True or False: When laying out a stub pattern for a T the end view is all that is required.
True
37
How do you calculate the tee stub stretchout on a rectangular tee?
2L + 2W (length + length + width + width)
38
How is the stub developed for a rectangular on round pipe tee?
Divide plan view into equal increments
39
The process for laying out a wye and a tee are the same, true or false?
True
40
What type of fitting is the intersection of two pipes at an angle?
Pipe tee
41
Parallel line development is a process of developing patterns with a what?
Constant cross section
42
________ ______ are the foundation of parallel line development.
Element lines
43
To properly develop a parallel line development pattern, you must have the true length of the? A. Baseline B. Element line C. Miter line D. Projection line
B. Element line
44
Primes in parallel line development are names used to identify an?
Extra element point
45
An object *not* developed with parallel line development is? A. Round elbow B. Roof jack C. Round tee D. Boot tee
D. Boot tee
46
True or False: You can develop patterns for spherical objects using parallel line development.
True
47
True or False: Parallel line development uses the same steps for any object developed with this method.
False More complicated objects may require you to add different steps to your parallel line method, but the basic principles stay the same
Sheet Metal 2nd Year
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