Parallel Line Development

Question 1

A line used to divide an object into sections when developing patterns for round or irregular shapes, drawn on the elevation view at their true length-

Answer 1

Element line

Question 2

A pattern with allowances added for fabrication-

Answer 2

Gross pattern

Question 3

A line used to project an element point from one view to another-

Answer 3

Projection line

Question 4

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

Answer 4

Step off distance

Question 5

A pattern with no allowances added-

Answer 5

Net pattern

Question 6

Names used to identify extra element points related to another point-

Answer 6

Primes

Question 7

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

Answer 7

Miter line

Question 8

View of an object from the side-

Answer 8

Elevation view

Question 9

When top and bottom halves of a view are identical, this can be used as a shortcut for round layout?

Answer 9

Half plan view

Question 10

The actual length of a line usually found in elevation view?

Answer 10

True length line

Question 11

View of an object from above or below-

Answer 11

Plan view

Question 12

How many views are required to perform parallel line development?

Answer 12

2

Question 13

A projection line is drawn in __________________ weight?

Answer 13

Construction

Question 14

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

Answer 14

12

Question 15

What view is used to lay out a hole pattern?

Answer 15

Elevation view

Question 16

Another name for the length of a pattern?

Answer 16

Stretchout

Question 17

What method is used in parallel line development to divide the stretchout into 12 equal spaces?

Answer 17

Sloped rule

Question 18

What type of fitting is the intersection of two pipes at an angle?

Answer 18

Pipe tee

Question 19

What type of cylinder has the bases parallel to each other but the sides are not perpendicular to the bases?

Answer 19

Oblique cylinder

Question 20

Objects with a constant cross section can be developed with parallel line, true or false?

Answer 20

True

Question 21

When describing a pipe tee, you first state the ____________ size and then the main branch size?

Answer 21

Stub

Question 22

It is always best to start where when numbering the 12 equal divisions on a stub pattern?

Answer 22

At the seam

Question 23

When laying out a tee fitting, you start by drawing what view?

Answer 23

Side elevation

Question 24

Corresponding element lines from the end view and side elevation create what?

Answer 24

Mitre line

Question 25

The process for laying out a wye and a tee are the same, true or false?

Answer 25

True

Question 26

What is the purpose of an offset?

Answer 26

To bypass a permanent obstruction either vertically or horizontally

Question 27

When manufacturing an offset, the length should be a minimum of how long in relation to the offset amount?

Answer 27

Minimum twice as long as the offset amount

Question 28

Angle divided by the number of pieces x 2 -2 is what formula?

Answer 28

Mitre angle formula

Question 29

The most accurate method to establishing a mitre line is what?

Answer 29

Bisecting (trisecting) an angle

Question 30

After establishing a mitre line, what can be used to ensure the angle is correct?

Answer 30

Protractor

Question 31

3.14 x diameter =

Answer 31

Stretchout

Question 32

If your mitre line was developed at 15 degrees, what would be the included angle of a middle gore?

Answer 32

30 degrees

Question 33

How many methods are there to lay out an offset?

Answer 33

4, (given throat, given heel, given centreline, bisecting the centreline)

Question 34

What 3 pieces of information must you know to lay out an offset?

Answer 34

Offset amount, opening size and vertical height

Question 35

What method is used to transfer the length of the element lines on the elevation view to the stretchout in parallel line development?

Answer 35

Projection

Question 36

When calculating small end on a fitting, always round __________ when converting from decimal to fraction?

Answer 36

Up

Question 37

What is always marked on the pattern to aid in the fabrication process?

Answer 37

Centreline

Question 38

What is the stretchout for a 7" LE with a 1/2" lap seam?

Answer 38

22 1/2"

Question 39

How is the stub developed for a rectangular on round pipe tee?

Answer 39

Divide plan view into equal increments

Question 40

What is the minimum number of points required to develop a curve?

Answer 40

3

Question 41

How many supports does a roof jack require?

Answer 41

Three supports

Question 42

What method of development is used for oblique and right cylinders? Simple layout Parallel line development Triangulation Radial line development

Answer 42

Parallel line development

Question 43

How do you calculate the tee stub stretchout on a rectangular tee?

Answer 43

2L + 2W (length + length + width + width)

Question 44

Calculate the mitre angle for a 4 piece, 3", 90 degree elbow?

Answer 44

15 degrees

Question 45

Calculate the mitre angle for a 3 piece, 4", 45 degree elbow?

Answer 45

11.25 degrees