PD TQ Prep 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

When is a branch mitre developed?

A

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

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3
Q

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

A

False

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4
Q

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

A

True

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5
Q

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

A

Swing true length lines

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6
Q

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

A

30 degree

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7
Q

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

A

Commercial air handling

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8
Q

Where is a conical tee on round pipe typically found?

A

Commercial HVAC

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9
Q

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

A

No

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10
Q

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

A

Yes

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11
Q

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

A

¼ view

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12
Q

Where are boot tees commonly found?

A

Dust collection systems

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13
Q

What application is a tee on taper commonly used in?

A

Blow pipe system

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14
Q

What other fitting usually accompanies a commercial conical tee?

A

Reducer

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15
Q

Where can sectional curves be found?

A

45° fitting

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16
Q

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

A

3

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17
Q

What view is developed from the sectional curves?

A

Hole miter plan view

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18
Q

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

A

The developed miter

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19
Q

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

A

Radial line development

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20
Q

What is a residential conical tee fitting commonly called?

A

Saddle takeoff

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21
Q

What type of fitting do boot tees commonly replace?

A

45° Tee

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22
Q

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

A

Elliptical

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23
Q

What method is used to develop an oblique cylinder pattern?

A

Line to line

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24
Q

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

A

Circumference

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25
Q

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

A

Parallel line development

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26
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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27
Q

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

A

Pee wee tape

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28
Q

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

A

TOP VIEW

29
Q

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

A

BOTTOM VIEW

30
Q

What application uses pipe tees on cones?

A

Blow pipe/dust collection systems

31
Q

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

A

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

32
Q

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

A

Frustum

33
Q

Which way do element lines always run?

A

Apex to base or base to apex ABBA

34
Q

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

A

True length

35
Q

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

A

Stub Ys

36
Q

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

A

30 degrees

37
Q

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

A

Commercial air handling units

38
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

39
Q

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

A

Like a shield

40
Q

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

A

Teardrop shaped

41
Q

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

A

A circle

42
Q

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

A

Hole and stub pattern

43
Q

Where is a cone on pitch usually found?

A

Residential sloped roofs

44
Q

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

A

Reducer

45
Q

What is another name for a pipe tee on cone?

A

Tee on taper

46
Q

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

A

Saddle take off

47
Q

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

A

One

48
Q

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

A

Two

49
Q

What is the formula for Vertical Apex?

A

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

50
Q

What view is developed from the sectional curves?

A

The hole, mitre plan view

51
Q

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

A

The developed mitre

52
Q

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

A

True

53
Q

What two fittings is slipping a pattern commonly used for?

A

Transitional elbows and offsets

54
Q

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

A

M = Offset x Width / Length

55
Q

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

A

Radial Line & Parallel Line

56
Q

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

A

Parallel Line development

57
Q

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

A

Side Elevation view

58
Q

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

A

Triangulation

59
Q

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

A

Plan and elevation views

60
Q

What is a Right cone?

A

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

61
Q

What is an oblique cone?

A

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

62
Q

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

A

Side and end view

63
Q

Is an oblique cylinder laid out by parallel line development?

A

True

64
Q

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

A

12 parts

65
Q

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

A

True

66
Q

What is the centerline radius equal to?

A

2½ times the diameter of the elbow

67
Q

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

A

No

68
Q

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

A

The collar