Pattern Development

Question 1

____ ____ are the foundation of parallel line development.

Answer 1

Element lines.

Question 2

To properly develop a parallel line development pattern, you must have the true length of the:

Answer 2

Element line.

Question 3

Primes in parallel line pattern development are names used to identify an ____ ____ ____

Answer 3

Extra element point.

Question 4

An object not developed with simple parallel line development is a:

Answer 4

Boot tree.

Question 5

True or false: You can develop patterns for spherical objects with the parallel line development.

Answer 5

True; Parallel line development can be used to develop patterns for dome shaped objects.

Question 6

True or false: Parallel line development uses the same steps for any object developed with this method

Answer 6

False; More complicated objects may require you to add different steps to your parallel line method, but the basic principles remain the same.

Question 7

The ___ of the ___ is found in the plan view.

Answer 7

The perimeter of the pater is found in the plan view.

Question 8

Element line spacing on the stretchout is best developed by:

Answer 8

Calculating and measuring.

Question 9

To see what the actual base plate would look like, you could develop a:

Answer 9

Auxiliary view.

Question 10

A ____ adjustable elbow can be twisted to form any angle from ____.

Answer 10

90 degree, any angle from 0 degree to 90 degree.

Question 11

Adjustable elbows that are manufactured for commercial applications are typically made from either ____ or sections otherwise referred to as ____.

Answer 11

5 or 7 pieces, gores.

Question 12

Round offsets are required when the pipe must ____ either horizontally or vertically.

Answer 12

Bypass a permanent obstruction.

Question 13

The ____ is the line where two gores of the round elbow meet at an angle.

Answer 13

Miter line.

Question 14

What is the formula used to calculate the miter angle?

Answer 14

Miter angle = Degree of the elbow divided by (2x number of pieces -2)

Question 15

What is the formula used to calculate the stretch out for pipe?

Answer 15

3.14 x diameter = Stretchout

Question 16

What are the two methods used to draw the miter line for a round elbow?

Answer 16

Basic geometry and a protractor.

Question 17

The plan view can be drawn either a ____.

Answer 17

Full plan view or half plan view.

Question 18

When calculating the miter line of a round offset, there are four possible methods which can be used depending on which criteria applies. State the four different possibilities.

Answer 18

1) with the throat given
2) with the centerline given
3) with the heal given
4) bisecting the centerline

Question 19

The development of a round offset is similar to that of a ____.

Answer 19

3 piece elbow.

Question 20

When the throat height is given when creating the miter line for a round offset, the arc will be drawn from ____.

Answer 20

The throat.

Question 21

What is the allowance for an elbow seam?

Answer 21

1/8”

Question 22

Using a ____ connects the points with curves to complete the first gore.

Answer 22

Flexible curve.

Question 23

What is the small end allowance?

Answer 23

7 x the material thickness.

Question 24

What is the allowance for a grooved seam?

Answer 24

3 x the grooved seam.