Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
Where is a protractor used?
|
for constructing lines for angles other than 45 or 90 degrees
|
|
How is a point marked with a prick punch?
|
By using light taps with a small ball peen hammer.
|
|
WHat is used to scribe a circle with a radius larger than dividers?
|
Trammel points
|
|
Where are dividers used?
|
To scribe arcs and circles, to transfer measurements from a scale to the layout, and to transfer measurements from one part of the layout to another.
|
|
What is a stretchout?
|
A pattern on a flat sheet which has not been formed into a three dimensional object.
|
|
How do you compute circumferance?
|
multiply the diameter by PI or 3.1416
|
|
Why are edges formed?
|
To improve the appearance of the work, to strengthen the piece or to prevent a sharp edge
|
|
How are sheetmetal edges formed?
|
form the metal itself by inserting wire, or by attaching a band or angle iron.
|
|
Name the three kinds of lap seams?
|
plain, offset, and corner.
|
|
How are lap seams joined?
|
By drilling and riveting , by soldering or by a combination of both riveting and soldering.
|
|
What is the rivet allowance for a lap seam?
|
5 times the diameter of the rivet.
|
|
Where are grooved seams used?
|
In the construction of cylindrical shapes.
|
|
What are the two types of grooved seams?
|
Outside and inside.
|
|
What is the allowance for a grooved seam?
|
3 times the width of the lock.
|
|
What is the pittsburgh lock seam?
|
A corner seam which is used to advantage in rectangular ventilation lines, elbows and boxes.
|