Chapter 28

Question 1

Match the common welding issues with the cause of the problem.

Spatter and undercutting, deep crater

a.
Welding current too high
b.
Welding current too low
c.
Welding speed too fast
d.
Welding speed too slow

Answer 1

a
Welding current too high

Question 2

Match the common welding issues with the cause of the problem.

Irregular bead with skips

Answer 2

c
Welding speed too fast

Question 3

Match the common welding issues with the cause of the problem.

Bead too high, somewhat irregular, and porous; builds up too much metal and metal stays melted too long

Answer 3

d
Welding speed too slow

Question 4

Match the common welding issues with the cause of the problem.

Poor penetration with high narrow bead

Answer 4

b
Welding current too low

Question 5

Correctly match the arc striking method to the description.

Hold the electrode directly above the work. The rod is brought down and touches the base metal, but must be quickly brought up to prevent sticking.

a.
Scratching Motion Method
b.
Tapping Method

Answer 5

b
Tapping Method

Question 6

Correctly match the arc striking method to the description.

Generally easier for the beginning welder; bring the electrode down to the plate at an angle and scratch the plate like you are striking a match. When the arc is started, quickly raise the electrode so it doesn’t stick to the base metal.

a.
Scratching Motion Method
b.
Tapping Method

Answer 6

a
Scratching Motion Method

Question 7

After the skill of striking and maintaining an arc is mastered, what should a beginning welder practice?

Selecting electrodes

Adjusting the settings on the welder

Running beads

Chipping slag

Answer 7

Running beads

Question 8

The metal core of the electrode has to come in contact with the work piece in order to ____.

pre-heat the metal

turn the welder on

start the flow of electrons

Answer 8

start the flow of electrons

Question 9

How do you prevent a crater from forming at the end of your weld bead?

Turn up the amperage on your welder

Pick up your rod quickly at the end of the bead

Hold your rod briefly in place to allow the filler metal to fill in

Answer 9

Hold your rod briefly in place to allow the filler metal to fill in

Question 10

For beginners, he recommends setting your welder amperage to the _____.

high end of the range

low end of the range

Answer 10

high end of the range

Question 11

The two tips given to prevent sticking your rod to the work piece when striking an arc are . . .

be gentle and keep the rod moving

hover over work piece and slide rod back and forth

quick taps and then pull sharply away from work piece

Answer 11

be gentle and keep the rod moving

Question 12

Sometimes, with rods like the 7018, slag builds up on the tip and prevents you from being able to strike an arc. What tips are recommended to help with this issue?

Soak the tips in water to break up the slag

Flicking the rod when you finish a bead to get rid of the excess slag on the tip

Using sandpaper or a file to file the slag away from the tip

Throw the rod away as it can no longer be used

Answer 12

Flicking the rod when you finish a bead to get rid of the excess slag on the tip

Using sandpaper or a file to file the slag away from the tip