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23 Cards in this Set
- Front
- Back
List 3 types of measuring tools used on the shop |
Rules Tapes Specialty measuring devices |
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To adjust the blanks and patterns for growth remove: |
1/16" per joint |
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The net pattern lines are created on a blank that has cut to size by: |
Making the allowances |
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What are 2 adjustments that needs to be checked when using a brake? |
A) the distance between the top leaf and the folding leaf. B) the clamping pressure. |
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When using the box-and-pan brake, the operator should always: |
Check the alignment of the fingers to ensure that they are straight. |
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Over-bending of material in the brake is done to compensate for: |
Spring-back |
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The allowances on the curved cheeks will normally be: |
3/16" |
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Cheeks with straight sides may have the male Pittsburg allowance of: |
1/4" |
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To properly notch the allowance of a runner that will be broken, the notch should be: |
To the net pattern line. |
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On a slip roll forming machine, the roll that is set to form the amount of curve is the: |
Rear Roll |
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Y branches and larger fittings may require a: |
2 piece heel. |
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When folding 1/2" fold on a fitting to accept the drive cleat _____ ____ may not be used. |
Cheek bender. |
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To prevent damage to the folding leaf when forming a hamerlock, it is necessary to relieve the material used for the ______ of the Pittsburgh lock. |
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List 4 advantages that the proprietary duct connection offers over a standing drive connection. |
*Fabrication of fittings and ductwork is simplified *Net patterns only are required on the duct joint ends. *The joint provides more rigidity *The joint makes better seal. |
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Before attempting to assemble the Pittsburgh lock, it is important to ensure that: |
The female side of the lock is open and loose enough to accept the male. |
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Tacking a Pittsburgh seam refers to: |
Folding the flange over at intervals. |
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If the Pittsburgh lock seam is forced all the way close in one pass, it will save time and look neater. T/F |
False. It will make wrinkles and have room for air to move. |
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When assembling a slip-and-drive joint, the drive cleat goes on the: |
Vertical side of the fitting. |
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When bending over the hammerlock flange, the flange should be_____ by placing the project on a bench. |
Backed-up |
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Flexible duct connection is used for : |
Isolate HVAC equipment from ductwork . |
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What is the maximum length of a fire damper sleeve with breakaway connections? |
Fire separation wall + 6" on both sides. |
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Fire damper may be adjusted or modified to fit odd sized ductwork |
Not at all. They are ULC rated. |
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If fire damper sleeve is required for 8" ×8" ductline, what size does the fire damper needs to be? |
8"×8" |