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Sheet Metal 4th Year > Radial Line Development > Flashcards

Radial Line Development Flashcards

1
Q

What step differentiates conical layout from radial line development?

A

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

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2
Q

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

A

Frustums of cones, cone intersections and point locations

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3
Q

When developing the full pattern stretch out for a cone what is used to measure the stretch out?

A

Pee wee tape

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4
Q

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

Below the elevation view?

A

Top view

Bottom view

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5
Q

What application uses pipe tees on cones?

A

Blow pipe/dust collection systems

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6
Q

When laying out a pattern for a truncated cone, always draw the entire cone first and cut it off later. True or false

A

True

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7
Q

When a cone is laid out and then truncated, what is the remaining portion called?

A

Frustum

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8
Q

Which way do element lines always run?

A

From apex to base or base to apex

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9
Q

An element line that falls on the outside sloped sides of a cone are true length or foreshortened?

A

True length

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10
Q

Pipe tee on cone fittings are sometimes referred to as?

A

Stub Y’s

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11
Q

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

A

30 degrees

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12
Q

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

A

Commercial air handling

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13
Q

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

A

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

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14
Q

The pipe tee stretch out is developed using radial line development?

A

No, parallel line development

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15
Q

For a horizontal pipe tee on cone, what shape will the hole pattern be?

A

It will be shaped like a shield

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16
Q

For a vertical pipe tee on cone, what shape will the hole pattern be?

A

It will be teardrop shaped

17
Q

For a 45 degree pipe tee on cone, what shape will the hole pattern be?

A

It will be a circle

18
Q

By adding a plan view to a pipe tee on cone fitting, along with the elevation view, you can develop what?

A

A mitre line

19
Q

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

A

A hole and stub pattern

20
Q

A cone on pitch is usually found where?

A

Residential sloping roofs

21
Q

Conical tees used in commercial applications usually accompany what other fitting?

A

Reducer

22
Q

What is another name for a pipe tee on cone?

A

Tee on taper

23
Q

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

A

Saddle take off

24
Q

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

A

One

25
Q

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

A

Two

26
Q

What is the formula for Vertical Apex?

A

VA=VH X LD divided by
LD - SD

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

27
Q

Sectional curves can be found in what fitting?

A

A 45° fitting

28
Q

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

A

3 points

29
Q

What view is developed from the sectional curves?

A

The hole mitre plan view

30
Q

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

A

The developed mitre

31
Q

When laying out an oblique cone which lines are used to develop the views and which lines are used to develop the pattern?

A

The element lines are used to develop the views and true length lines are used to develop the pattern

32
Q

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

A

True

33
Q

Slipping a pattern is commonly used for what 2 fittings?

A

Transitional elbows and offsets

34
Q

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

A

M= Offset x Width / Length

Sheet Metal 4th Year (5 decks)

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