Seams, Fasteners, Sealants, and Insulation (110101k)

Question 1

What is a sheet metal seam?

Answer 1

Seam is how two or more pieces of Sheetmetal are fastened together.

Question 2

Standing seams

Answer 2

They are great no mater the thickness as they are great at reinforcing the material

Question 3

What is peen seam AKA?

Answer 3

A single seam (3W)

Question 4

What is a double seam?

Answer 4

Single seam that is hammer over after the fact (3w)

Question 5

What is a dovetail seam?

Answer 5

Dovetail seam is fabricated on site and they are use in place of a hammerlock

Question 6

What is a hemmed edge used for?

Answer 6

They are use as a safety edge and the also add stiffness

Question 7

What is the use of a drip edge?

Answer 7

Use to divert the water away from the flashing

Question 8

What is a wired edge used for?

Answer 8

Used as a safety edge and for strength

Question 9

What is the most common type of pipe?

Answer 9

Snap lock

Question 10

What is a joint described as?

Answer 10

The means used to connect duct work and fittings together

Question 11

What are common types of joints in Sheetmetal trade?

Answer 11

Slip and drive

Question 12

What is TDC

Answer 12

Transverse duct connector

Question 13

What is a propiatary connector?

Answer 13

Produced to replace angle iron frames on medium and tight pressure duct

Question 14

What is a straight notch?

Answer 14

Just a straight cut in the material up to the joint allowance

Question 15

What is a square notch?

Answer 15

A notch that removes the square excess from the allowance

Question 16

What is a slant notch?

Answer 16

A notch that is cut a 45 degrees to prevent overlaying g with hems

Question 17

What is a full v notch?

Answer 17

A notch that is cut at exactly at 45 degrees. Used for bending 90s

Question 18

What is a v notch?

Answer 18

A notch that is used at any angle

Question 19

What is a fastener?

Answer 19

A device designed to join or assemble two or more pieces of something

Question 20

What is a blind rivets two main types?

Answer 20

Open type and closed type

Question 21

Are rivets water proof?

Answer 21

No but they are wether proof

Question 22

What are three types of blind rivet heads?

Answer 22

Dome, countersink, large flange rivet

Question 23

What is a rivet burr?

Answer 23

This is washer like pice that is used to back a pop rivet

Question 24

What is the pop rivet code

Answer 24

The number gives us the diameter first and then the length

Question 25

What are the five main types of screw heads for Sheetmetal trade?

Answer 25

Slotted
Robertson
Phillips
Hex
Combination

Question 26

What is the difference between self tapping and self piercing?

Answer 26

Self tapping have a drill bit in the end allowing it to easily enter the metal self piercing make less of a big hole and therefore can be removed and re enter multiple times

Question 27

What is a disadvantage of using a anchor?

Answer 27

The hole made must be critically sized

Question 28

How much of the duct must be coved with duct liner when insulating?

Answer 28

90% coverage

Question 29

When is a metal nosing used?

Answer 29

When the air velocity exceeds 4000 feet per minute