Practice Tests Flashcards
List 3 types of measuring tools used in the shop:
Rules, tapes, specialty measuring devices
To adjust the blanks and patterns for growth, what do you remove ?
1/16th per joint
The net pattern lines are created on a blank that has been cut to size by:
Marking the allowances
What are the 2 adjustments that need to be checked when using the break?
The distance between the top leaf and folding leaf.
The clamping pressure
When using the box and pan break, the operator should always what?
Check the alignment of the fingers to ensure that’s they are straight
Over bending of material in the break is done to compensate for what?
Spring back
The allowances on curved cheeks are:
3/16”
Cheeks with straight sides may have the male Pittsburgh allowance of:
1/4”
To properly notch the allowance of a runner that will be broken, the notch should be:
To the net pattern
On a slip and roll forming machine, the roll is set to form the amount of curve is the:
Rear roll
Y-Branches and larger fittings may require a ____
2 piece heel
When folding the 1/2” fold on fittings to accept a drive cleat, a ______ may not be used
Cheek bender
To prevent damage to the folding leaf when forming a hammerlock, it is necessary to relieve the material used for the _____ of the Pittsburgh lock
What are 4 advantages that the proprietary duct connection offers over a standing drive connection
Fabrication is simplified.
The joint has more rigidity
The joint makes a better seal
Net patterns are only required
Before attempting to assemble the Pittsburgh lock, it is important to ensure that:
The lock is open and loose enough to accept the hook
