Deck 12: Gas Metal Arc Welding

Question 1

Vertical up welds require a forehand gun angle.

Answer 1

True

Question 2

The ____ is made by tack welding one piece of metal on another piece of metal at a right angle.

A) tee joint
B) butt joint
C) lap joint
D) outside corner joint

Answer 2

A

Question 3

If the wire feed speed is too high, the voltage is too high.

Answer 3

False

Question 4

One disadvantage of the backhand welding technique is limited visibility.

Question 5

When a weave is needed for better bead control, the weaves are usually fairly small.

Question 6

Butt joints are made by overlapping the edges of the two plates.

Question 7

A welded tee joint can be strong only if it is welded on both sides and has deep penetration.

Question 8

The disadvantages of using the forehand welding technique are: weld thickness, welding speed, and ____.

A) joint visibility
B) electrode extension
C) spatter
D) less weld penetration

Question 9

The wire feed speed is generally recommended by the electrode manufacturer and is selected in ____.

A) inches per second (ips)
B) revolutions per minute (rpm)
C) inches per minute (ipm)
D) impulses per second (ips)

Question 10

The advantages of the ____ are: weld bead visibility, travel speed, and depth of fusion.

A) forehand welding technique
B) backhand welding technique
C) tangential welding technique
D) perpendicular welding technique

Question 11

As the electrode extension is increased, there is a reduction in weld heat, penetration, and fusion, and an increase in ____.

A) tensile strength
B) solubility
C) sensible heat
D) buildup

Question 12

Usually, butt welds are made all the way along the length of the joint.

Question 13

The lap joint can be welded on one side or both sides with a ____.

A) fillet weld
B) root weld
C) grooved weld
D) GTA weld

Question 14

The horizontal tee and lap welds are almost as easy to make as the fillet welds.

Question 15

Changes in the electrode travel angle will affect the weld bead shape and ____.

A) cost
B) penetration
C) dimension
D) distortion

Question 16

____ are commonly used to join the edges of plates and structural members.

A) Plug welds
B) Spot welds
C) Fillet welds
D) Butt welds

Question 17

The higher the wire feed speed, the lower the welding current.

Question 18

The term perpendicular is used when the gun angle is at approximately ____ to the work surface.

A) 30°
B) 45°
C) 90°
D) 180°

Question 19

There are several reasons butt welds may be made as ____.

A) horizontal welds
B) spot welds
C) intermittent welds
D) plug welds

Question 20

Because a lap joint may not be as strong in all directions, it is important to weld all sides of the joint when possible.

Question 21

____________________ welds are used when the strength of a full-length weld is not required, to speed up the welding process and reduce welding cost, to reduce welding heat distortion, or to help stop weld bead cracking.

Question 22

The gun angle, work angle, and ____________________ are names used to refer to the relation of the gun to the work surface.

Question 23

Forehand, perpendicular, and ____________________ are the terms most often used to describe the gun angle as it relates to the work and the direction of travel.

Question 24

The joining of an I-beam and H-column in a building's construction is a good example of a(n) ____________________ joint.

Question 25

An outside corner joint is made by placing the plates at an angle to each other, with the edges forming a(n) ____________________.