Chapter 6

The cover pass should not be more than ____________________ inch(es) wider than the groove opening

1/8 inch

Wagon tracks are ____. a-discontinuities resulting from failure to clean the convex root weld b-the small amount of metal deposited during the hot pass c-pinholes left in the root pass d-the weave pattern of a hot pass

a

Which of the following is true of open root welds? a-The face side is not as important as the root surface on the back or inside. b-The face side is just as important as the root surface on the back or inside. c-The face side is more important than the root surface on the back or inside. d-The back and inside of the root surface are not important.

a

Which of the following is true of the cover pass? a-It should be neat looking. b-It should be more than 1/8 inch wider than the groove opening. c-It need not be free of defects such as porosity or overlap. d-It should not be uniform in reinforcement.

a

How can a small gap between the plate and backing strip be removed? a- By heating the plates with a torch and squeezing them together in a vise. b- By making another larger tack weld so it will pull the plates together. c- There is no reason to remove these gaps, the weld will fill them up. d- By placing it on an anvil and striking it with a hammer.

d

Raising the end of the electrode too high or moving it too far ahead of the molten weld pool can cause ____. a-burn-through b-slag and metal to be deposited ahead of the weld bead c-all of the shielding gas to be blown away from the molten weld pool d-the weld pool to harden

c

The best way(s) to remove slag between filler weld passes is (are) ____. a-using an open root weld b-using a cover pass c-using a hot pass d-chipping, wire brushing, and grinding

d

The distance an electrode is moved from the molten weld pool and the length of time in the molten weld pool are found by watching the____. a-keyhole b-length of the arc c-electrode d-molten weld pool

d

The hot pass uses ____ to reshape the bead a-lower-than-normal amperage and a fast travel rate b-higher-than-normal amperage and a slow travel rate c-lower-than-normal amperage and a slow travel rate d-higher-than-normal amperage and a fast travel rate

d

To pass visual inspection prior to preparation for bend testing, which of the following is true of undercut? a- It must exceed 10% of the base metal or 1/32 in., whichever is greater. b- It must exceed 1/32 in. c- It must exceed 10% of the base metal. d- It must not exceed 10% of the base metal or 1/32 in., whichever is less.

d

What can be done to prevent the weld bead becoming too built up when restarting a weld? a- Use a long arc on the starting electrode and hold the arc in one place so it melts the buildup down before restarting the weld. b- Make an electrode change before the rod gets too short so you see the weld better. c- Tapering the weld down before stopping to make the restart more even. d- Start the next weld slightly in front of the ending point of the last weld.

d

What is the maximum width of the root face? a-3/32 in (2.4 mm) b-5/32 in (4 mm) c-1/16 in (1.6 mm) d-1/8 in (3 mm)

d

Which of the following is true of the hot pass? a-The hot pass is designed to be used on critical, high-strength code welds. b-The hot pass is ideal for covering bad welds or repairing welds of a less skilled welder. c-The hot pass may not be used to fill small spots or pinholes left in the root pass. d-A very small amount of metal should be deposited so that the resulting weld is concave

d

To keep a molten weld pool from becoming too large, ____ the travel speed, ____ the angle, shorten the arc length, or lower the amperage a-increase, increase b-decrease, increase c-increase, decrease d-decrease, decrease

c

What are backup tapes made from? a- high temperature carbon strips b- the same metal as the test plates c- high-temperature ceramics d- carbon

c

____________________ is the temperature of the metal during welding

interpass temperature

In the ____ method, the electrode is moved in and out of the molten weld pool as the weld progresses along the joint a-root gap b-Multipass c-key hole d-open root weld

c

A ____ arc prevents metal from being deposited ahead of the weld bead a-long b-short c-short to medium d-medium to long

a

A weld likely will fail testing if the weld contains ____. a- a long string or large pieces of slag inclusions b-slag inclusions that are too small c-too few slag inclusions d-any slag inclusions

a

How much of the plate surface next to the weld groove must be mechanically cleaned to a bright finish before welding begins? a- 1 in. (25 mm) b- 1/2 in. (13 mm) c- 2 in. (50 mm) d- 3/4 in. (19 mm)

a

If all of the shielding gas is blown away from the molten weld pool, ____. a-oxides can cause porosity b-excessive slag will result c-excessive spattering can result d-the weld will have burn-through

a

When making a root weld with a straight step or "T", how do you get good root fusion to the backing strip? a-By pushing the electrode into the root opening. b-By changing from DCEP to DCEN or AC current. c-By holding the electrode at a steep leading angle. d-By using a long arc with high amperage.

a

The ____ fuses the two parts together and establishes the depth of weld metal penetration. a- hot pass b- root pass c- cover pass d- backing strip

b

The last weld bead on a multipass weld is the ____. a-root weld b-cover pass c-hot pass d-filler pass

b

What are some of the defects that the root weld face may have that are acceptable as long as the root surface is correct? a- cracks and porosity b- undercut and overlap c- arc strikes and worm holes d- None of the above

b

What is the maximum root opening? a-3/32 in (2.4 mm) b-1/8 in (3 mm) c-5/32 in (4 mm) d-1/16 in (1.6 mm)

b

What may need to be done to the root surface of a weld that is prepared on both sides before the next weld pass(es)? a-Re-tack welded b-ground or gouged clean c-Nothing, it will be on the back anyway d-sanded smooth

b

____________________ is a process of cutting a groove in the back side of a joint that has been welded.

back gouging

A key hole can be used ____. a-only on narrow joints b-only on joints with a varying root gap c-only on wide joints d-on joints with wide, narrow, or varying root gaps

d

As the trailing angle of an electrode is ____, penetration, depth, and burn-through ____. a-increased, increase b-decreased, increase c-flatter, increase d-decreased, decrease

d