202d

Question 1

How should you lay the beads when surface welding for buildup work?

A. space them so that they are 3.2 mm (1/8”) apart
B. blend them together so they form a solid layer of weld metal
C. space them so that they are 6.4 mm (1/4”)
D. the toe of one bead should meet the toe of the next bead

Answer 1

B. blend them together so they form a solid layer of weld metal

Question 2

is it necessary (Yes or no) to remove the following from mild steel base metal before welding with GMAW?

A. mill scale _________
B. loose rust ________
C. oil _________
D. varnish ________
E. soapstone markings _________

Question 3

identify the following for GTAW on mild steel.

A most common electrode type:
_____________________
B electrode preparation shape:
_____________________
C current type :
______________________

Question 4

what shielding gas is most often used for GTAW on mild steel?

_____________________________

Question 5

What size of gas nozzle bis recommended for any GTAW application?
___________________________________

Question 6

An appropriate electrode stickout for GTAW:

A. prevents good visibility in all positions
B. allowed you to maintain a long arc
C. causes atmospheric contamination of the electrode
D. maintains a gas shield around the electrode and molten welding metal.

Question 7

name two techniques used for adding filler rod with GTAW.

Question 8

Changing the inclination of the holder in relation to the direction of travel:

A changes the depth of penetration
B has no effect on the weld
C causes the filler rod to freeze in the puddle
D causes the filler rod to melt prematurely

Question 9

in what position(s) can you do surface welding with GTAW?

A. vertical position only
B. flat and horizontal positions
C. all positions except vertical
D. all possessions

Question 10

how is the work positioned for a 1f tee joint?

A. 90 deg and 0 deg relative to the horizontal plane
B 180 deg and 360 deg relative to the horizontal plane
C. 120 deg and 60 to the horizontal plane
D. each member at 45 deg to the horizontal plane

Question 11

given the choice, what position should you use for the most productive fillet welding?

A. 4F
B. 3F
C. 1F
D. 6F

Question 12

what is the recommended electrode angle for a 2F weld on 10 gauge material

A. 90 deg to the vertical plane
B. 90 deg to the horizontal angle for a 2F weld on 10 gauge material
C. 45 deg to the vertical and horizontal planes
D. 270 deg to the welders initial position prior to the arc ignition

Question 13

what is the likely weld progression for a single pass 3f weld on 10 gauge material with GTAW?

A. uphill
B. downhill
C. saw tooth weave
D. back step

Question 14

AS a general rule, at what thickness of material should joint preparation be consider for full penetration groove welds using GTAW?

A. 2.5 mm (3/32”)
B. 4.8 mm (3/16”)
C. 6.4 mm (1/4”)
D. 9.6 mm (3/8”)

Question 15

how long should the tack welds be for the plate weld projects in this model?

A. 2.5 mm - 3.2 mm (3/32”- 1/8’’)
B. 3.2 mm - 4 mm (1/8” - 5/32”)
C. 6.4 mm - 9.6 mm ( 1/4” - 3/8’’ )
D. 12.8 mm -19mm ( 1/2” - 3/4” )

Question 16

what is the recommended electrode inclusion for the 1G weld?

A. 0 - 15 deg forehand
B. 0- 15 deg backhand
C. 20 -30 deg forehand
D. 20 - 30 deg backhand

Question 17

describe the dip technique adding filler rod.

_____________________________________________

Question 18

what is fall-through?

A. a technique for adding filler rod in the root bead
B. a low crater at the end of the weld
C. a localized area of excessive penetration
D. crater cracking as the result of failing to tail out

Question 19

what is the maximum electrode extension used for GTAW? why?

______________________-

Question 19

what is likely to happen if a keyhole forms in the 1G position?

A. full fusion and penetration
B. lack of fusion
C. the electrode melts off into the puddle
D. fall-through

Question 20

what is meant by suck-back and how may it occur?

Question 21

state 3 actions that may be used to increase root bead penetration

A _________________
B _________________
C _________________

Question 22

in a multi pass welds, which pass is more susceptible to cracking?

A. the first filler pass
B. the cap pass
C. the second filler pass
D. the root pass

Question 23

a procedure used to help prevent weld bead crater cracking is :

A. tailing out prior to breaking the arc
B. using a shorter arc
C. increasing the electrode angel
D. breaking the arc and removing the filler road as quickly as possible

Question 24

what is the purpose of pre-setting the 2G weld on plate? A. it makes them easier to tack. B. it compensates for shrinkage caused by stringer bead on multi-pass welding C. it makes the groove wider for better penetration D. the weld edges can be seen more clearly

Question 25

what is the recommended bevel angle for a bevel angel range for a single vee groove weld preparation on pipe? A.10 - 15 deg B. 15 - 22.5 deg C. 30 - 37.5 deg D. 60 - 75 deg

Question 26

how many tacks are recommended for joining 150 mm (6") normal pipe size? A 2 B 3 C 4 D 6

Question 27

if the gap is uneaqual after the first to tacks have been placed on pipe joint, you should: A. cut the joint apart and start the joint preparation all over again B. place the third tack on the tight side to even out the gap C. place the third tack at the widest location to even out the gap D. use a sledge hammer to even out the gap

Question 28

which of the following would be most effective in reducing accidents caused by portable grinders kicking back? A keep both hands on the grinder and clamp the work B keep the grinder in contact with the work from the start to stop C place the grinder on a flat surface until it stops rotating D keep one hand on the grinder while holding onto the work with others