Forming Test Review

Question 1

Why is there a minimum bend radius established when forming metals?

Answer 1

To prevent critically weakening the metal at the bend

Question 2

What is Springback related to sheet metal forming?

Answer 2

The natural tendency for a piece of metal being cold formed to slightly return back to the original form when force is removed

Question 3

What is the minimum size drill bit used on Relief holes

Answer 3

1/8 or #30

Question 4

Figure
(SB)
(BA)
(TL)

Answer 4

(SB) .0525322
(BA) .089799
(TL) 6.984746

Question 5

Aluminum should be bent ________ the grain

Answer 5

Against

Question 6

What is the purpose of a Relief Hole?

Answer 6

It prevents cracking or tearing at the intersection of two bends

Question 7

What is closed angle?

Answer 7

Acute or less than 90 degrees when measured

Question 8

What type of brake is used to bend flat sheet metal into boxes?

Answer 8

Box and Pan Brake

Question 9

What tool is used to make folds along only the edge of the metal?

Answer 9

Bar Folder

Question 10

A bend tangent line is?

Answer 10

The line where the metal starts to bend and where it stops bending

Question 11

What tool is used to make cylinders?

Answer 11

Slip Form Roller

Question 12

What is the short part of a formed angle called?

Answer 12

Flange

Question 13

An open angle is?

Answer 13

Obtuse or more than 90 degrees

Question 14

What is the purpose of a Joggle?

Answer 14

To prove clearance for a sheet or extrusion

Question 15

Where is the radius of a bend measured?

Answer 15

Inside the bend or curve

Question 16

Where is the sight line placed if we bend metal 90 degrees from flat

Answer 16

Within the bend allowance area one bend radius from the bend tangent line

Question 17

What is the function of a lightning hole?

Answer 17

To reduce the overall weight of the part

Question 18

What is the Cornice brake designed for use in?

Answer 18

Making folds in metal

Question 19

Holes are drilled at their intersection of two bends to prevent cracking, what are these holes called?

Answer 19

Relief Holes

Question 20

Would you use conventional hand shears on Magnesium

Answer 20

Never

Question 21

The distance from one bend tangent line to the other bend tangent line is called?

Answer 21

Bend Allowance

Question 22

When bending metal the area not affected by either compression or stretching is called?

Answer 22

Neutral Line

Question 23

What does crimping do to a piece of metal being worked?

Answer 23

It shortens the piece of metal by creating a series of folds, pleating or corrugating the metal.

Question 24

What is the long part of a formed angle called?

Answer 24

Leg

Question 25

Lightning holes should never be cut into structure unless authorized?

Answer 25

True

Question 26

A piece of flat stock that is bent to 37 degrees what type of angle is this?

Answer 26

Closed or Acute

Question 27

What would be the bend allowance for a piece of stock to be bent at 90 degrees, 1/4 Radius, .040 thickness

Answer 27

.421

Question 28

What is the maximum working pressure for Acetylene gas?

Answer 28

15 PSI

Question 29

What is Backfire?

Answer 29

Momentary backward flow of the gasses at the tip

Question 30

What is the purpose of the inert gas that is used to TIG weld?

Answer 30

It creates a shield to keep oxygen away from the weld puddle so oxides cannot form

Question 31

What determines the amount of heat that is applied to the metal?

Answer 31

Size of torch tip opening

Question 32

An oxidizing flame consist of too much what?

Answer 32

Oxygen

Question 33

What determines the size of the torch tip?

Answer 33

Thickness of the mental being welded

Question 34

What is flashback?

Answer 34

Overheating of the torch

Question 35

What voltage and amperage setting is used in electrical resistance welding?

Answer 35

Low voltage, High Amperage

Question 36

What are the characteristics of a good weld?

Answer 36

It should taper off smoothly into the base metal