PD TQ Prep

Question 1

What step differentiates conical layout from radial line development?

Answer 1

Both use a vertical apex and elevation view but radial adds the use of a plan view

Question 2

When is a branch mitre developed?

Answer 2

Two or more oblique cones intersect, creating one primary opening and multiple secondary openings

Question 3

Is a full pattern necessary when developing a pattern for an oblique three-way?

Answer 3

False

Question 4

Is it necessary to create a plan view when developing an oblique three-way Y Branch?

Answer 4

True

Question 5

What is an apex in plan view B used to accomplish?

Answer 5

Swing true length lines

Question 6

Which pipe tee on cone fitting is most preferred on a dust collection system?

Answer 6

30 degree

Question 7

What other application is the preferred pipe tee on cone fitting used?

Answer 7

Commercial air handling

Question 8

Where is a conical tee on round pipe typically found?

Answer 8

Commercial HVAC

Question 9

Is a side elevation view necessary when developing a 90° conical tee fitting?

Answer 9

No

Question 10

Is a side elevation view necessary when developing a 30° conical tee fitting?

Answer 10

Yes

Question 11

What size of pattern is necessary to develop a 90° conical tee fitting?

Answer 11

¼ view

Question 12

Where are boot tees commonly found?

Answer 12

Dust collection systems

Question 13

What application is a tee on taper commonly used in?

Answer 13

Blow pipe system

Question 14

What other fitting usually accompanies a commercial conical tee?

Answer 14

Reducer

Question 15

Where can sectional curves be found?

Answer 15

45° fitting

Question 16

What is the minimum number of points needed to develop sectional curves?

Answer 16

3

Question 17

What view is developed from the sectional curves?

Answer 17

Hole miter plan view

Question 18

What must be developed on the elevation view prior to creating the hole pattern stretchout?

Answer 18

The developed miter

Question 19

What method is used to develop the hole pattern for a 45° pipe tee on cone?

Answer 19

Radial line development

Question 20

What is a residential conical tee fitting commonly called?

Answer 20

Saddle takeoff

Question 21

What type of fitting do boot tees commonly replace?

Answer 21

45° Tee

Question 22

What is the shape of the mitred end of a right cylinder?

Answer 22

Elliptical

Question 23

What method is used to develop an oblique cylinder pattern?

Answer 23

Line to line

Question 24

The oblique cylinder ½ pattern curved stretch out equals ½ the cylinder’s mitred _____?

Answer 24

Circumference

Question 25

What method is used to develop the pipe tee stretch out?

Answer 25

Parallel line development

Question 26

What does the plan view in radial line help to develop?

Answer 26

Frustums of cones, cone intersections and point locations

Question 27

What is used to measure the stretch out when developing the full pattern stretch out for a cone?

Answer 27

Pee wee tape

Question 28

If the plan view is above the elevation view, what view are you looking at?

Answer 28

TOP VIEW

Question 29

If the plan view is below the elevation view, what view are you looking at?

Answer 29

BOTTOM VIEW

Question 30

What application uses pipe tees on cones?

Answer 30

Blow pipe/dust collection systems

Question 31

When laying out a pattern for a truncated cone, what should you do first?

Answer 31

Always draw the entire cone first and cut it off later.

Question 32

What is the remaining portion called when a cone is laid out and then truncated?

Answer 32

Frustum

Question 33

Which way do element lines always run?

Answer 33

Apex to base or base to apex ABBA

Question 34

Are element lines that fall on the outside sloped sides of a cone true length or foreshortened?

Answer 34

True length

Question 35

What are pipe tee on cone fittings sometimes referred to as?

Answer 35

Stub Ys

Question 36

What is the preferred pipe angle on a pipe tee fitting?

Answer 36

30 degrees

Question 37

Besides dust collection systems, where else are pipe tee on cone fittings found?

Answer 37

Commercial air handling units

Question 38

How many plan views are needed to develop all patterns for a pipe tee on cone fitting?

Answer 38

2 - The pipe tee plan view and the conical fittings plan view

Question 39

What shape will the hole pattern be for a horizontal pipe tee on cone?

Answer 39

Like a shield

Question 40

What shape will the hole pattern be for a vertical pipe tee on cone?

Answer 40

Teardrop shaped

Question 41

What shape will the hole pattern be for a 45 degree pipe tee on cone?

Answer 41

A circle

Question 42

What can be developed on a cone fitting once you have the mitre line?

Answer 42

Hole and stub pattern

Question 43

Where is a cone on pitch usually found?

Answer 43

Residential sloped roofs

Question 44

What other fitting usually accompanies conical tees used in commercial applications?

Answer 44

Reducer

Question 45

What is another name for a pipe tee on cone?

Answer 45

Tee on taper

Question 46

What is a conical tee fitting used in residential commonly called?

Answer 46

Saddle take off

Question 47

How many views are required for developing a pattern for a 90 degree conical tee?

Answer 47

One

Question 48

How many views are required when developing a pattern for a conical tee that is not 90 degrees?

Answer 48

Two

Question 49

What is the formula for Vertical Apex?

Answer 49

Vertical apex = vertical height x large diameter divided by large diameter - small diameter

Question 50

What view is developed from the sectional curves?

Answer 50

The hole, mitre plan view

Question 51

What must be developed on the elevation view prior to creating a whole pattern stretch out?

Answer 51

The developed mitre

Question 52

When constructing an oblique three-way Y branch, are both plan and elevation views necessary?

Answer 52

True

Question 53

What two fittings is slipping a pattern commonly used for?

Answer 53

Transitional elbows and offsets

Question 54

What is the formula for calculating a mitre in the field?

Answer 54

M = Offset x Width / Length

Question 55

What type of layout is used for a cylinder intersecting a cone?

Answer 55

Radial Line & Parallel Line

Question 56

What method of pattern development may be applied to a project using the gore method?

Answer 56

Parallel Line development

Question 57

When laying out the pattern for a tee stub at 45 degrees, where are the true lengths for the stub taken from?

Answer 57

Side Elevation view

Question 58

How could you layout a taper if the apex is off the work surface?

Answer 58

Triangulation

Question 59

To develop a pattern by means of parallel lines, what must you first draw?

Answer 59

Plan and elevation views

Question 60

What is a Right cone?

Answer 60

Has tapering sides and a cutting plane at 90 degrees to the axis would be a circle

Question 61

What is an oblique cone?

Answer 61

Has tapering sides and a cutting plane at 90 degrees to the axis would not be a circle

Question 62

What views are needed to make an off center right angle boot?

Answer 62

Side and end view

Question 63

Is an oblique cylinder laid out by parallel line development?

Answer 63

True

Question 64

When developing a pattern for a 6pc. 90 degree round elbow, how many parts would the elbow be divided into?

Answer 64

12 parts

Question 65

When using parallel line development of right cylinders, will the stretch-out line always be at right angles to the element lines?

Answer 65

True

Question 66

What is the centerline radius equal to?

Answer 66

2½ times the diameter of the elbow

Question 67

Can a round funnel be laid out with parallel line development?

Answer 67

No

Question 68

When developing a pattern for a right angle boot, where are the 1/12 spacings taken from?

Answer 68

The collar