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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

Radial line development adds the use of a plan view

Conical layout and radial line development both utilize a vertical apex and elevation 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

What is used to measure the stretch out for a cone?

A

Pee wee tape

Pee wee tape is a specialized measuring tool used in various applications, including measuring the stretch out for cones.

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4
Q

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

A

M = Offset x Width / Length

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5
Q

What is slipping a pattern commonly used for?

A

Transitional elbows and offsets

Slipping a pattern refers to the method of adjusting or modifying the layout of fittings in piping systems.

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6
Q

What are the two fittings associated with slipping a pattern?

A

Transitional elbows and offsets

These fittings help in directing fluid flow and accommodating changes in direction.

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7
Q

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

A

True

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8
Q

What lines are used to develop the views of an oblique cone?

A

Element lines

Element lines help in visualizing the shape and orientation of the cone in various views.

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9
Q

What lines are used to develop the pattern of an oblique cone?

A

True length lines

True length lines are essential for accurately representing the dimensions and shape of the cone when creating a pattern.

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10
Q

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

A

The developed mitre

The term ‘developed mitre’ refers to the necessary preparation or layout of angles and edges in design before proceeding with further pattern work.

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11
Q

What view is developed from the sectional curves?

A

The hole mitre plan view

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12
Q

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

A

3 points

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13
Q

Sectional curves can be found in what fitting?

A

A 45° fitting

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14
Q

What is the formula for Vertical Apex?

A

VA = VH x LD / (LD - SD)

Where VA is Vertical Apex, VH is vertical height, LD is large diameter, and SD is small diameter.

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15
Q

What does VA stand for in the formula for Vertical Apex?

A

Vertical Apex

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16
Q

What does VH represent in the formula for Vertical Apex?

A

Vertical height

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17
Q

What does LD refer to in the formula for Vertical Apex?

A

Large diameter

18
Q

What does SD signify in the formula for Vertical Apex?

A

Small diameter

19
Q

Fill in the blank: The formula for Vertical Apex is VA = VH x LD divided by _______.

A

LD - SD

20
Q

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

A

Two

21
Q

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

A

One

22
Q

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

A

Saddle take off

23
Q

What is another name for a pipe tee on cone?

A

Tee on taper

24
Q

What fitting usually accompanies conical tees in commercial applications?

A

Reducer

25
Q

A cone on pitch is usually found where?

A

Residential sloping roofs

26
Q

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

A

A hole and stub pattern

27
Q

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

A

A mitre line

28
Q

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

A

It will be a circle

29
Q

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

A

Teardrop shaped

30
Q

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

A

It will be shaped like a shield

This refers to the specific geometric configuration of the hole pattern in relation to the design of the pipe tee.

31
Q

What type of development is used for the pipe tee stretch out?

A

Parallel line development

Radial line development is not used for this process.

32
Q

Is the pipe tee stretch out developed using radial line development?

A

No

The correct method is parallel line development.

33
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

34
Q

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

A

Commercial air handling

Pipe tee on cone fittings are also utilized in various commercial air handling applications.

35
Q

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

A

30 degrees

36
Q

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

A

Stub Y’s

Stub Y’s are specific types of fittings used in piping systems.

37
Q

An element line that falls on the outside sloped sides of a cone is described as what?

A

True length

This means that the element line maintains its actual dimension without distortion.

38
Q

What term describes the shortening of an object when viewed at an angle?

A

Foreshortened

Foreshortening occurs when the perspective causes an object to appear shorter than it is.

39
Q

Which way do element lines always run?

A

From apex to base or base to apex

40
Q

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

A

Draw the entire cone first and cut it off later.

41
Q

True or false: You should cut off the cone before drawing the pattern.

A

False

42
Q

What application uses pipe tees on cones?

A

Blow pipe/dust collection systems

Sheet Metal 4th Year (7 decks)

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