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Question 1

Grooved seam

Answer 1

22. Gauge and ticker is. 3W +4t
    Less than 22 gauge is 3W
    Most often used on round pipe

Question 2

Corner lap seem

Answer 2

Outside corner lap on heavier gauge material and 1T is deducted from net stretch out of the inside
Inside corner lamp on lighter gauge and 1/8should be added to the net get an off the outside plate

Question 3

A groover with an opening – larger than the required groove should be used

Answer 3

1/16

Question 4

Noyes groover are are used to form

Answer 4

Long seams or large, seen large number of seams

Question 5

Setting the fingers of a bar folder

Answer 5

Width of seem minus 2 metal thickness of

Question 6

To adjust the blanks and patterns for growth remove

Answer 6

1/16 per joint

Question 7

Stainless steel flux is

Answer 7

Lloyd’s flux

Question 8

Aluminum flux is

Answer 8

Kester special al

Question 9

Sal ammoniac is used to clean

Answer 9

Soldering copper

Question 10

Most important of all the soldering techniques, and will produce the strongest and most water tight seam

Answer 10

Sweating 

Question 11

Acme lock is

Answer 11

Double offset similar to grooved seam

Question 12

Depth of Notch for piece of duct is

Answer 12

3/4 and 30 degree