Deck 19: Gas Tungsten Arc Welding Plate and Pipe Aws Sense Certification

Question 1

​How much of the surface beside a weld groove must be cleaned for the AWS SENSE workmanship samples?

A) ​½ in.(13 mm)
B) ​1 in.(25 mm)
C) ​¾ in.(19 mm)
D) ​2 in.(50 mm)

Answer 1

B

Question 2

​What is the minimum acceptance criteria for root face concavity for visual inspection of tubing welds?

A) ​3/32 in (2.4 mm)
B) ​1/16 in (1.6 mm)
C) ​1/8 in (3.2 mm)
D) ​no concavity allowed

Answer 2

B

Question 3

​What is the minimum acceptance criteria for undercut for visual inspection of tubing welds?

A) ​1/64 in (0.4 mm)
B) ​1/32 in (0.8 mm)
C) ​1/16 in (1.6 mm)
D) ​no undercut allowed

Answer 3

B

Question 4

​What is the minimum acceptance criteria for the depth of porosity for visual inspection of tubing welds?

A) ​no porosity allowed
B) ​1/64 in (0.4 mm)
C) ​25% of the base metal thickness
D) ​Ok as long as the weld does not leak

Question 5

​When the parts are clamped in place for the AWS SENSE workmanship samples, what must you check before making the tack welds?

A) ​The proper root gap.
B) ​The tightness of the clamps to prevent movement of the parts during tack welding.
C) ​That the next pieces of the workmanship sample are available to complete the job.
D) ​That you have a long enough piece of filler metal to complete the tack.

Question 6

​What is the minimum acceptance criteria for porosity for visual inspection of lap welds?

A) ​one porosity per 1 in.(25 mm) of weld
B) ​one porosity per 2 in.(50 mm) of weld
C) ​one porosity per 1 1/2 in.(36 mm) of weld
D) ​no porosity is allowed

Question 7

​How should the stainless steel be cleaned before starting to weld an AWS SENSE workmanship sample?

A) ​acid
B) ​alkaline
C) ​detergent
D) ​All of the above

Question 8

​After the surface of an aluminum AWS SENSE workmanship sample has been cleaned, it should be welded within ____ minutes.

A) ​10
B) 20​
C) ​1 hour
D) ​8 hours

Question 9

​What materials must be cleaned off of the stainless steel AWS SENSE workmanship samples during preparation of the base metal?

A) ​cutting fluids
B) ​grease
C) ​primers
D) ​All of the above

Question 10

​What is the maximum diameter of tungsten that can be used on the AWS SENSE workmanship samples?

A) ​no restrictions on size
B) ​1/16 in (1.6 mm)
C) ​1/8 in (3.2 mm)
D) ​3/32 in (2.4 mm)

Question 11

​What is the minimum acceptance criteria for cracks for visual inspection of butt welds?

A) 3/32 in (2.4 mm)
B) ​1/16 in (1.6 mm)
C) ​1/8 in (3.2 mm)
D) ​​no cracks allowed.

Question 12

​How can tungsten be conserved if it accidentally becomes contaminated?

A) ​Break off only the smallest possible piece of the contaminated tungsten.
B) ​Strike an arc on a scrap piece of stainless steal and burn off the contamination.
C) ​As long as you can keep an arc you can continue welding without stopping to clean the tip.
D) ​Carefully grind off the contamination.

Question 13

​What is the maximum interpass temperature allowed for the plain carbon steel AWS SENSE workmanship samples?

A) ​120°F (49°C)
B) ​100°F (37°C)
C) ​150°F (65°C)
D) ​135°F (57°C)

Question 14

​Before welding on the AWS SENSE workmanship sample, what temperature must a plain carbon steel part be above?

A) ​32°F (0.0°C)
B) ​100°F (37°C)
C) ​50°F (9.4°C)
D) ​0.0°F (-18°C)

Question 15

​What is the minimum acceptance criteria for root reinforcement for visual inspection of butt welds?

A) ​3/32 in (2.4 mm)
B) ​1/16 in (1.6 mm)
C) ​1/8 in (3.2 mm)
D) ​no reinforcement allowed

Question 16

Why might it be necessary to reclean the surface of an aluminum AWS SENSE workmanship sample?

A) ​The surface oxides have reformed.
B) ​The surface has become contaminated.
C) ​It has been too long since the surface was cleaned.
D) ​All of the above

Question 17

​What is the minimum acceptance criteria for undercut for visual inspection of butt welds?

A) ​greater in depth than 15% of the base metal thickness
B) ​greater in depth than 5% of the base metal thickness
C) ​greater in depth than 10% of the base metal thickness
D) ​no undercut allowed

Question 18

​What is the minimum acceptance criteria for face reinforcement for visual inspection of tee welds?

A) ​3/32 in (2.4 mm)
B) ​1/16 in (1.6 mm)
C) ​1/8 in (3.2 mm)
D) ​no reinforcement allowed

Question 19

​Which mechanical test(s) are required for the GTAW AWS SENSE 18 gauge through 10 gauge sheet metal qualification tests?

A) ​No mechanical test required
B) ​guided bend
C) ​free bend test
D) ​guided bend and tensile test

Question 20

​What is the maximum overlap of the cover weld allowed along the edge of the weld groove on a 2G pipe weld?

A) ​no overlap is allowed
B) ​1/16 in (1.6 mm)
C) ​1/8 in (3.2 mm)
D) ​3/32 in (2.4 mm)

Question 21

​Why is it very important that the pipe welding test specimen be mounted so it does not move or vibrate during welding?

Question 22

Describe the metal preparation procedure for the plain carbon steel AWS SENSE workmanship samples.
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Question 23

​List the visual inspection criteria for the stainless steel AWS SENSE workmanship samples.

Question 24

​Sketch the front view layout for the AWS SENSE GTA practice welds for the butt, lap, and tee joints.

Question 25

​After passing a visual inspection, what mechanical test is next used on the 2G or 6G pipe test specimen?

A) ​X-ray
B) ​dye penetrant
C) ​guided-bend test
D) ​nick break test

Question 26

​Describe how the free bend test is performed.