Sheet Metal Homework 2

Front 1

A non-sparking metal

Back 1

Alluminum

Front 2

This metal is slightly soft with a rough finish

Back 2

hot-rolled

Front 3

This word commonly refers to the thickness of metal

Back 3

Guage

Front 4

These substances form when metal is exposed to oxygen

Back 4

patina

Front 5

This metal is nearly indestructible

Back 5

Stainless Steel

Front 6

This metal is gauged by ounces per square foot

Back 6

copper

Front 7

This metal contains a low carbon content

Back 7

Mild steel

Front 8

This word often refers specifically to copper oxide

Back 8

patina

Front 9

This is the chemical change that occurs when a small electrical current is passed through a substance

Back 9

Electrolysis

Front 10

This substance forms instantly when aluminum is exposed to air.

Back 10

Aluminum oxide

Front 11

10 gauge metal is

Back 11

1/8" thick

Front 12

16 gauge metal is

Back 12

1/16" thick

Front 13

22 gauge metal is

Back 13

1/32" thick

Front 14

The range of gauges used for copper sheet in the sheet metal shop are

Back 14

10 to 48 ounces

Front 15

Lead is gauged by

Back 15

pounds per square foot

Front 16

Brass is gauged by

Back 16

ounces per square foot

Front 17

The type of aluminum most often used in architectural sheet metal work is called

Back 17

half hard

Front 18

Black iron, glavanized iron and stainless steel are gauged by a system called the U.S.

Back 18

standard gauge

Front 19

An ______ is a combination or compound of metals fused together.

Back 19

Alloy

Front 20

Aluminum ______ forms immediately after being exposed to weather, which makes aluminum resistant to most chemicals

Back 20

oxide

Front 21

_____ finish is the most common finish used for aluminum in the sheet metal shop

Back 21

mill

Front 22

When gauge measurement is critical, a sheet and plate ____ is used.

Back 22

Gauge

Front 23

Terne coated stainless steel is gauged by U.S. standard gauge or

Back 23

Decimals of an Inch

Front 24

____ refers to metals thicker than 1/4"

Back 24

Plate

Front 25

Aluminum is often _____ which means it is fused together with other metals

Back 25

Alloyed

Front 26

________ is a process that builds a natural oxide coating on aluminum

Back 26

Anodizing

Front 27

Soft copper is often used for intricate ornament work because it is extremely ______

Back 27

malleable

Front 28

And unsulator (such as building paper or ____ paint) can be used between copper and another metal in or to protect the other metal from being eaten away

Back 28

asphalt

Front 29

Chromium and nickel alloys increase steel's resistance to

Back 29

corrosion and heat

Front 30

______ is a grayish-white metal that is fusible and oxidizes very easily.

Back 30

Manganese

Front 31

______ is used to strengthen steel, is chemically nonreactive, and is not affected by most acids.

Back 31

Molybdenum

Front 32

______ means the aluminum is not heat-treatable

Back 32

H

Front 33

A threaded sleeve is driven in and a bolt is threaded into a

Back 33

drop-in anchor

Front 34

_____ is a light duty anchor

Back 34

nail-in anchor

Front 35

____ can be attached to beams.

Back 35

Clamps

Front 36

This force pulls straight down.

Back 36

Tensile load

Front 37

A bold with an anchor attached is a

Back 37

stud anchor

Front 38

Anchors driven in with explosive charges are

Back 38

powder-actuated fasteners

Front 39

This force is at right angles to the fastener

Back 39

Shear load

Front 40

Anchors installed using a cartridge containing two liquids that must be mixed are

Back 40

epoxy anchors

Front 41

This anchor is placed in the form before the concrete is poured.

Back 41

hangar insert

Front 42

This horizontal bar supports large ducts.

Back 42

Trapeze hangers

Front 43

____ is often used as window screen

Back 43

Screen cloth

Front 44

The most commonly used screen in a sheet metal shop is

Back 44

hardware cloth

Front 45

Sheet metal screw sizes are identified by a number that indicates the outside diameter of the screw head and a

Back 45

length

Front 46

A lag bolt is a large _____ with a square or hex head that can be turned with a wrench

Back 46

wood screw

Front 47

______ are used to hang all types of HVAC components

Back 47

Anchors

Front 48

The manufacturer's rated load capacity should be divided by _______ to determine the safe working load of an anchor

Back 48

four

Front 49

nail in anchors are _____-duty anchors

Back 49

light

Front 50

Stud anchors are _______-duty anchors

Back 50

medium

Front 51

Holes for anchors are usually _____ out from the side of the duct.

Back 51

1/2"

Front 52

Hangers are attached to duct with

Back 52

Sheet metal screws

Front 53

Sizes of op rivets are identified by

Back 53

grip and diameter

Front 54

______ are used to seal joints in metals that are difficult to solder

Back 54

Sealants