Lectures 7-8 Processes

Question 1

Advantages to SMAW

Answer 1

• portability
• versatility
• cheap compared to other high priced processes

Question 2

Disadvantages to SMAW

Answer 2

• electricity use
• ## harmful fumes released

Question 3

GMAW stands for

Answer 3

gas metal arc welding

Question 4

GMAW is a.k.a

Answer 4

MIG/MAG

Question 5

MIG/MAG stands for

Answer 5

Metal inert/active gas

Question 6

GMAW is ——- and ——— compared to SMAW

Answer 6

cheaper, quicker

Question 7

Advantages to GMAW

Answer 7

• versatility - can weld lots of metal types
• high weld speed
• automation
• better production efficiency due to not needing to replace the electrode

Question 8

Disadvantages to GMAW

Answer 8

-

Question 9

FCAW stands for

Answer 9

flux cored arc welding

Question 10

FCAW has two protection methods, what are they

Answer 10

• self-shielded method
• gas-shielded method

Question 11

Disadv. to FCAW

Answer 11

• filler metal is more expensive GMAW filler
• ## requirement to remove slag after welding

Question 12

Adv. to FCAW

Answer 12

-

Question 13

Most common method of non-consumable weld

Answer 13

• GTAW or gas tungsten arc welding

Question 14

Adv. to GTAW

Answer 14

• high quality weld finish
• no slag defects
• works well for complex geometries or sheets

Question 15

Disadv. to GTAW

Answer 15

• high level of skill required
• expensive due to use of inert gases
• slower production rates

Question 16

Resistance welding uses a combination of — and — to accomplish coalescence

Answer 16

heat and pressure

Question 17

How is the heat generated in the RW process.

Answer 17

generated by the electrical resistance to current flow through the two sheets of metal

Question 18

What is another type of RW?

Answer 18

Resistance spot welding

Question 19

Adv. to RW

Answer 19

• no filler material
• high production rates
• lower operator skill required

Question 20

Disadv. to RW

Answer 20

• high intial equipment cost
• limited to lap joints