Triangulation Part 1 Flashcards
Is a garbage chute a triangulated fitting?
Yes
The hypotenuse is a side in what kind of triangle?
Right angle triangle
What is the equation for Pythagorean?
A squared + B squared = C squared
Do you use a face line for triangulation a top takeoff?
No
A foreshortened line is __________
A line that appears shorter than it really is
The true length triangles horizontal leg is _________
A foreshortened dimension
Can the vertical height of a fitting include seams and allowances?
Yes
Does the face line run 90 degrees to the secondary Y branch opening
No
When determining the VH for a pattern, what must be subtracted
All seams and allowances
Cheek patterns for transitional Y-branches are developed from which view
Elevation view
On a transitional Y branch when calculating the amount of change at the crotch, you would
Determine whether the crutch changes dimension
On a transitional Y branch, what line do you use to swing the heel arc on the transitional check?
Face line
When triangulating a square to round, what view is primarily used to start this process?
Plan view
What line types are drawn from the divided round opening to the square corners during the develooment process for a square to round
Element
When fabricating a supply air plenum transition for a furnace replacement, the transition is ised to connect the new furnace to which existing component?
Existing plenum
What is the primary function of transitional offsets in HVAC systems?
To change the direction of airflow without significantly increasing friction.
When transferring a foreshortened line and using the known vertical height of a fitting to a true length triangle, what is the developed hypotenuse called?
Triangulated lengthi
What type of fitting utilizes a “face line” to develop the heel arc on a sloped cheek patter?
Y-branch
What must be subtracted from a fitting being developed using a true length triangle and a
vertical height?
Seams and allowances
What view is typically laid out prior to developing patters for an on centre transition?
Plan
If the vertical height (V.H.) is 9-½ and the distance between two points in plan view is 6, how long would the net pattern be?
11-1/4”
When developing a pattern for a transitional elbow, which view is typical drawn first?
Elevation
What is the result of a property designed Y-branch?
Achieves the splitting of airflow with minimal turbulence.
