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Sheet Metal First Year > Laps And Seams > Flashcards

Laps And Seams Flashcards

1
Q

What is one of the most common joints in the sheet metal trade?

A

Lap

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2
Q

What is meant by a fastener pitch?

A

Spacing

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3
Q

How much must be deducted from an outside lap?

A

1 1/2 times the diameter of the rivet

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4
Q

Spot welding is also known as what?

A

Adhesion or fusion

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5
Q

When spot welding where should I place my first spot weld?

A

Center working outwards

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6
Q

Pop rivets are also known as?

A

Blind rivets

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7
Q

How much should the rivet shank protrude through the material before upsetting the rivet?

A

1 1/2 times the diameter of the rivet

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8
Q

What is the allowance for a grooved seam?

A

3w

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9
Q

What is another name for a hammerlock?

A

Tap in

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10
Q

What is allowance for a hammerlock?

A

3w

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11
Q

What is the most common longitudinal seam used on medium pressure duct?

A

Pittsburgh

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12
Q

What is the pocket depth on a Pittsburgh female portion of the seam?

A

3/8

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13
Q

What is minimum allowance to run through a Pittsburgh machine?

A

7 inch

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14
Q

The male hook for a Pittsburgh is what width for duct and fittings?

A

1/4 duct
3/16 fittings

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15
Q

What rotary machine is used to turn an edge up on a rectangular elbow fitting?

A

Easy edger

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16
Q

What power machine is used to turn a 3/16 flange?

A

Power flanger

17
Q

What bench machine is used to bend the male portion of a square throat elbow?

A

Cheek bender

18
Q

Where is button lock used?

A

Lower pressure duct residential

19
Q

What is the minimum edge distance for a fastener?

A

2 times the fastener diameter

20
Q

When running a piece of material through the Pittsburgh machine what side should you be looking at inside or outside?

A

Inside

21
Q

What seam is used in the field on round pipe to fasten to a piece of duct?

A

Dovetail

Sheet Metal First Year (31 decks)

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