Parallel Line Development

Question 1

What is standard practice for dividing a circle?

Answer 1

Dividing it into 12 equal pieces

Question 2

The quadrant lines for locating the center of a circle give you what? What gives you the rest?

Answer 2

4 element lines, bisecting the quadrants

Question 3

Another name for side view

Answer 3

Elevation view

Question 4

A “bird’s eye” view or top-down view is called what?

Answer 4

Plan view

Question 5

One way of indicating element points behind one another is?

Answer 5

Put the hidden points in brackets

Question 6

Element points go in clockwise or counterclockwise around the circle

Answer 6

Clockwise

Question 7

Extra element points are named? What are they for

Answer 7

Primes identify points related to another point to indicate different ends of a line.

Question 8

What is a step off distance.

Answer 8

Distance on a stretch out line representing distance between element points

Question 9

What is a net pattern

Answer 9

A pattern without allowances

Question 10

What is a gross pattern

Answer 10

A pattern with allowances for fabrication

Question 11

The element lines of what view are generally true lengths?

Answer 11

Elevation

Question 12

How do the element lines on plan views appear to look like?

Answer 12

Points

Question 13

If the top and bottom of the view are identical what can be used?

Answer 13

Half plan view

Question 14

Intersection of two pipes at an angle is known as what?

Answer 14

Pipe tee

Question 15

What is developed for objects cut off at an angle? What is the line that represents it?

Answer 15

Miter and miter line

Question 16

What is a stretch out

Answer 16

Is the length of any pattern.

Question 17

Why is it common practice to put the stretchout line at right angles of the element lines.

Answer 17

So that it shows the element lines in true length.

Question 18

Min views required to develop pattern with PLD.

Answer 18

2

Question 19

The perimeter of a pattern is found in what view? Formula for the perimeter.

Answer 19

Plan view, diameter times pie. Perimeter=stretchout

Question 20

What is the view that shows height and length, true lengths of elements representing the height is what?

Answer 20

Elevation view, usually the quickest and most accurate place to start.

Question 21

Lines projected from view to view or view to pattern are called? Drawn in _____weight?

Answer 21

Projection lines
construction

Question 22

PLD uses the same steps for any object developed with this method? True or false

Answer 22

False

Question 23

You can develop patterns for spherical objects using PDL

Answer 23

True

Question 24

To properly develop a PDL pattern, you must have the true length of what?

Answer 24

Element lines

Question 25

What info is needed to develop a pipe tee

Answer 25

Angle, height, and diameter of stub
Diameter length of body

Question 26

Tee and wye’s on center means?

Answer 26

The intersection in the middle of the duct

Pipe stub on center of main branch

Question 27

Tee’s or wye’s off center means

Answer 27

The intersection of the pipes is off to one side

The stub is off to one side of the main branch

Question 28

Formula for developing a retangluer stretch out

Answer 28

2L+2W
2×Length + 2×width