Seams, Fasteners, Sealants And Insulation (110101k)

Question 1

What are sheet metal seams?

Answer 1

Sheet metal seams are how two or more pieces, parts or sections of sheet metal are fastened together

Question 2

What are standing seams used on?

Answer 2

Items such as metal roof panels, large air ducts, fittings and plenums

Question 3

What is another name for single seam?

Answer 3

Peened seam

Question 4

What is a double seam?

Answer 4

A single seam that is hammered over to form the double seam

Question 5

What is an elbow seam used for?

Answer 5

Joining individual sections of round elbows to the bodies of fittings such as square to round

Question 6

What is a dovetail seam?

Answer 6

A field fabricated seam used in place of a hammer lock seam

Question 7

Why is a drip edge used?

Answer 7

To divert the flow of water away from the structure it is attached to

Question 8

What is a flanged edge used for?

Answer 8

It gives a means to attach it to something else as well as strengthing the edge

Question 9

What lock is used on round and oval pipe?

Answer 9

Snap lock

Question 10

What lock is used on lighter gauge residential installations?

Answer 10

Button lock

Question 11

What is most used lock in sheet metal?

Answer 11

Pittsburgh lock

Question 12

Where is a hammerlock used?

Answer 12

On the ends of rectangular and round take offs used for branch lines of main ducts.
Pto, top takeoffs, side takeoffs etc

Question 13

What is a joint?

Answer 13

Joints can be defined as the means to connect ductwork and fittings together

Question 14

What are slip and drives for?

Answer 14

These are used to attach ductwork and fittings together

Question 15

What does TDC mean?

Answer 15

Transverse Duct Connector which is a patented duct connection system that you will never see in real life

Question 16

What is notching for?

Answer 16

To remove areas of metal that interfere with bending and forming

Question 17

What are some different types of notches?

Answer 17

Straight notch
Square notch
Slant notch
Full v notch
V notch

Question 18

What is a fastener?

Answer 18

A mechanical device designed to hold, join, assemble or secure various components of an object or structure

Question 19

Why are they called blind rivets?

Answer 19

Because they can be set from one side of the work they don’t need access to both sides

Question 20

Is a weather tight seal waterproof?

Answer 20

No

Question 21

What are three types of blind rivet heads?

Answer 21

Dome head
Countersunk
Large flanged

Question 22

What are the two basic types blind rivets come in?

Answer 22

Open end
Closed end

Question 23

Why should acrylic caulking not be used indoors?

Answer 23

These have a strong odour

Question 24

What is thermal insulation used for?

Answer 24

To slow down the rate of heat transfer from inside the duct to surrounding atmosphere.
Prevent heat loss

Question 25

What is the difference between self tapping and self piercing?

Answer 25

Self tapping has a drill bit in the end
Self piercing makes a smaller hole and can be reused in same hole