Distortion Flashcards

1
Q
```Temperature, expressed in degrees Fahrenheit or degrees Celsius, refers to the measure of the:
A)Intensity of energy
B)Amount of energy
C)Volume of energy
D) Quantity of energy```
A

A)Intensity of energy

2
Q
```The term heat expresses
A)Quantity
B)Degrees
C)Temperature
D) Intensity```
A

A)Quantity

3
Q
```What is a common cause of distortion
A)Using specified welding procedures
B)Unequal heating and cooling of welds
C)Free expansion and contraction
D) Equal heating and cooling of welds```
A

B)Unequal heating and cooling of welds

4
Q
```When heated evenly and without restraint in which direction does metal expand
A)Transversely across
B)Longitudinally lengthwise
C)Volumetrically in all directions
D) only upwards and downwards```
A

C)Volumetrically in all directions

5
Q
```Transitional expansion occurs when a metal changes from
A)A solid state to a liquid state
B)One crystalline structure to another
C)One colour to another
D) A liquid state to a solid state```
A

B)One crystalline structure to another

6
Q
```Which type of distortion results from shrinkage across the world’s at 10 to pull a member of a T joint towards the welded site
A)Transitional distortion
B)Transverse distortion
C)Longitudinal distortion
D) Angular distortion```
A

D) Angular distortion

7
Q
```What type of distortion results in an overall reduction in the length of the weld
A)Transitional distortion
B)Transverse distortion
C)Longitudinal distortion
D) Angular distortion```
A

C)Longitudinal distortion

8
Q
```Which type of distortion refers to the tendency for the plates to draw together down the length of the joint as you were welding?
A)Transitional distortion
B)Transverse distortion
C)Longitudinal distortion
D) Angular distortion```
A

B)Transverse distortion

9
Q

What causes angular distortion in a V groove weld if the plates are free to move?
A)The nonuniform contraction of the weld material
B)The rapid cooling of the weld metal
C)Making tacks too small on the end of the plate
D) The weld metal expanding when it’s cold

A

A)The nonuniform contraction of the weld material

10
Q
```What is the primary cause of distortion created from longitudinal shrinkage?
A)Welding at a slower rate of speed
B)Making tacks too small and the ends
C)Weld made using the wrong polarity
D) Weld beads contracting upon cooling```
A

D) Weld beads contracting upon cooling

11
Q
```What welding variable is more likely to have the plates of a butt joint draw together causing transverse distortion?
A)Welding at a faster rate
B)Using straight polarity
C)Using reverse polarity
D) Welding at a slower rate```
A

D) Welding at a slower rate

12
Q
```What is one method you can use to correct angular distortion on butt joints?
A)Weld with one pass
B)weld with many passes
C)weld on both sides
D) Allow the plates to move freely```
A

C)weld on both sides

13
Q
```How can you reduce longitudinal distortion
A)Keep weld reinforcement to a minimum
B)Weld on one side of the joint only
C)Use slow welding speeds
D) Avoid back stepping```
A

A)Keep weld reinforcement to a minimum

14
Q

What is one method to reduce transverse distortion?
A)Use a slow deposition rate
B)Use a fast deposition rate
C)Align the plates so the space between them decreases along the length of the wild
D) Before welding, set the plates closer together than you need for the finished weld

A

B)Use a fast deposition rate

15
Q

What is the disadvantage to rigid clamping and fixturing?
A)Set up time slows down production
B)Some distortion can occur after releasing the clamping
C)Rigid clamping and fixturing material is expensive
D) This message cannot be used on objects with square corners

A

B)Some distortion can occur after releasing the clamping

16
Q

What is one advantage of a jigging device
A)Prevent shrinkage of parts
B)It allows for welding in all positions and reduces productivity
C)It maintains accuracy of the finished product
D) It prevents uneven contraction

A

C)It maintains accuracy of the finished product

17
Q
```Pieces of metal place on either side of the joint that absorb heat of the world and help prevent distortion or called
A)Plate clamps
B)weld positioners
C)Chill strips
D) Back up bars```
A

C)Chill strips

18
Q

What is the purpose of balancing welds around the neutral access of a worn shaft?
A)To equalize the contraction stresses of the welds
B)To increase the heat buildup into the shaft
C)To get a more uniform wild build up
D) To allow the use of larger electrodes

A

A)To equalize the contraction stresses of the welds

19
Q
```How can you help control distortion when welding light gauge metal
A)Increase the preheat temperature
C)Increase the number of tacks
D) Maintain a 90° electrode inclination```
A

C)Increase the number of tacks

20
Q

What fillet weld application Produces the greatest amount of distortion
A)Staggered intermittent fillet weld
B)A small fillet weld with a concave profile
C)Fillet weld produced with one continuous pass
D) Multipass fillet weld with a convex profile

A

D) Multipass fillet weld with a convex profile

21
Q

What is one characteristic of a good welding design
A)Uses many rapid changes in cross-section
B)It uses formed or roll the sections
C)Uses as many small pieces as possible
D) It uses vertical an overhead position Wells as much as possible

A

B)It uses formed or roll the sections

22
Q

When several plates must be welded together with butt joints what is the best world sequence to control distortion?
A)Wild from the outside edges and toward the centre in both directions
B)Well from the corners and toward the centre in all directions
C)Weld and concentric circles toward the centre without backtracking
D) weld from the centre and toward the outside in both directions

A

D) weld from the centre and toward the outside in both directions