P10-1 task 1

Question 1

GTAW is similar in technique to

1. OFC
2. FCAW
3. SMAW
4. GMAW

Answer 1

1. OFW

Question 2

The GTAW electrode is made from

1. magnesium of magnesium alloys
2. titanium or titanium alloys
3. copper or copper alloys
4. tungsten or tungsten alloys

Answer 2

d. tungsten or tungsten alloys

Question 3

GTAW is especially useful for welding light gauge materials because

1. heat input is higher than with other processes
2. less voltage is required than with other processes
3. heat input is lower than with other processes
4. the problem of burn-through is eliminated

Answer 3

c. heat input is lower than with other processes

Question 4

In the GTAW process, the base metal is protected from the atmosphere by the

1. radiation from the arc
2. electrode coating
3. sheilding gases
4. water vapour

Answer 4

c. sheilding gases

Question 5

Which of the following is an advantage of GTAW over other processes?

1. higher deposition rate
2. minimal afterweld cleanup
3. higher heat input
4. highly portable equipment

Answer 5

b. minimal afterweld cleanup

Question 6

Which of the following is another advantage of GTAW over SMAW?

1. It can join a great variety of metals
2. Training time for operations is minimal
3. The electrode coating provides 100% protection against contamination.
4. It has a very high deposition rate.

Answer 6

a. It can join a great variety of metals

Question 7

Which of the following is a disadvantage of GTAW compared the SMAW and other processes?

1. It is limited to joining carbon steels.
2. It produces a great deal of slag and spatter
3. It has a slower deposition rate
4. It has a higher heat input

Answer 7

c. It has a slower deposition rate

Question 8

1. Match the letters from figure 1 with the correct components of a GTAW workstation listed below.
2. inert gas supply
3. GTAW torch
4. flowmeter and regulator
5. power source
6. work lead
7. filler rod

Answer 8

1. inert gas supply e
2. GTAW torch b
3. flowmeter and regulator d
4. power source c
5. work lead f
6. filler rod a