Cutting Chapter 9

Question 1

What percent carbon , steel develops weak and brittle properties?

Answer 1

Above 1.4 percent

Question 2

!.4 percent carbon, steel develops weak and brittle properties similar to those of what?

Answer 2

Cast Iron

Question 3

The AISI and SAE designations are essentially different.

Answer 3

F

Question 4

What is the only difference between AISI and SAE?

Answer 4

AISI systems sometimes use letter prefix to indicate the manufacturing process that produced the steel.

Question 5

A

Answer 5

Open hearth steel

Question 6

B

Answer 6

Acid Bessemer carbon steel

Question 7

C

Answer 7

Basic open-hearth carbon steel

Question 8

D

Answer 8

Acid open-hearth carbon steel

Question 9

E

Answer 9

Electric furnace steel

Question 10

Nonmagnetic in the annealed condition and nonhardenable by heat treatment.

Answer 10

Austenitic stainless steels

Question 11

Austenitic steels can be hardened significantly by cold working.

Answer 11

T

Question 12

Austentic steels can combine ——- —— + ——– ——- with good ——- ——- over a broad ———— ——–

Answer 12

excellent corrosion

heat resistance

mechanical properties

broad temperature range

Question 13

Austentic stainless steel make up the largest of the 3 common grade stainless steels

Answer 13

T

Question 14

The force or load applied to a specimen that causes it to deform.

Answer 14

Stress

Question 15

Maximum tensile stress a material can withstand with out exceeding its elastic limit.

Answer 15

Tensile Strength

Question 16

Tensile Strength AKA

Answer 16

Yield Strength

Question 17

Rolled metal

Answer 17

Sheet metal

Question 18

What is the uniform thickness of sheet metal

Answer 18

less than 3/16 in

Question 19

U-shaped forms made of 2 flanges connected by a common web.

Answer 19

Channels

Question 20

The channel C8 X 11.5 is a channel having a normal depth of?

Answer 20

8 inches

Question 21

The channel C8 X 11.5 has a weight of?

Answer 21

11.5 pounds per foot of length

Question 22

Most common method of removing surface contamination?

Answer 22

Mechanical cleaning

Question 23

Tools used for mechanical cleaning include…. 3

Answer 23

Hand Tools
Power Tools
Special Sandblasting Equipment

Question 24

The welding position is important because some electrodes such as E7024 & E7028, can only be used in the ——– and ———– fillet weld positions

Answer 24

Flat

Horizontal

Question 25

You can attempt to weld in vertical or overhead positions with electrodes over 3/16 inches.

Answer 25

F except for low hydrogen electrodes

Question 26

The recommended limitation for low-hydrogen is

Answer 26

5/32 inch

Question 27

Performed by printing the ASTM number on the material (shape or plate) with an indelible marker or paintstick.

Answer 27

Labeling

Question 28

involves assigning a color to a base metal type and then spraying that color in the material

Answer 28

Color-coding

Question 29

Because it is difficult to identify base metal types, most sites have a system to ---------- or --------- the various types of metals being used.

Answer 29

Label | Color code

Question 30

Largest group of stainless steels

Answer 30

Austenitic Stainless Steels

Question 31

Austenitic Stainless Steels are

Answer 31

nonmagnetic.

Question 32

Also non magnetic

Answer 32

Nonferrous metals | Manganese Steels

Question 33

Both hot-rolled and cold-finished carbon steel are milled in ---- --- ---

Answer 33

standard structure shapes

Question 34

standard structure shapes such as 5

Answer 34

``` Rods Bars Beams Channels Angles ```

Question 35

Has a blue-gray, smooth to scaly surface, but oxidizes to a rough, red brown rust when exposed to weather.

Answer 35

Hot-rolled carbon steel

Question 36

Has a smooth, gray finish that oxidizes to a fine red brown rust when weathered

Answer 36

Cold-rolled carbon steel

Question 37

Mass (weight) of a specific volume of metal

Answer 37

Density

Question 38

Density is aka 2 things

Answer 38

Specific gravity | Specific density

Question 39

The weight of a metal compared to the weight of an equal volume of water

Answer 39

Specific gravity

Question 40

Inverse of conductivity

Answer 40

Resistivity

Question 41

Calculated from its measured resistance to current flow

Answer 41

Electrical conductivity of a metal

Question 42

The lower the resitivity value, the higher the conductivity value and the more current a metal can carry for it's size

Answer 42

T

Question 43

The resistivity of any material increases and it's conductivity decreases as its temperature....

Answer 43

rises