120102e Joint and Weld Types

Question 1

The five (5) basic types of joints are:
a) butt, edge, Tee, lap and groove.
b) butt, Tee, lap, comer and groove.
c) butt, Tee, lap, edge and corner.
d) butt, groove, Tee, edge and corner.

Answer 1

c) butt, Tee, lap, edge and corner.

Question 2

What type of joint is shown in Figure 27?
a) plug
b) tee
c) butt
d) lap

Answer 2

d) lap

Question 3

A butt joint is a welded joint where the joined parts:
a) lie in the same plane.
b) form a comer.
c) lie at right angles to each other.
d) form a Tee.

Answer 3

a) lie in the same plane.

Question 4

The four (4) main types of welds are:
a) groove, fillet, plug and surfacing.
b) fillet, Vee, bevel and groove.
c) Vee, bevel, bead and fillet.
d) groove, Vee, bevel and plug or slot.

Answer 4

a) groove, fillet, plug and surfacing.

Question 5

Name the five (5) types of groove welds.

Answer 5

a) square
b) bevel
c) Vee
d) J
e) U

Question 6

On what type of joint would you most likely find groove welds?
a) edge
b) butt
c) fillet
d) lap

Answer 6

b) butt

Question 7

The root bead of a groove weld is the:
a) last pass of the finished weld.
b) widest space between two pieces to be welded.
c) layer of weld metal which is intended to fill up the joint.
d) first pass or penetration bead.

Answer 7

d) first pass or penetration bead.

Question 8

Name the four (4) types of fillet welds.

Answer 8

a) continuous
b) intermittent
c) chain intermittent
d) staggered intermittent

Question 9

On what joints would you find a fillet weld?
a) edge, corner, butt
b) butt, lap, Tee
c) Tee, lap, corner
d) edge, lap, Tee

Answer 9

c) Tee, lap, corner

Question 10

The size of a fillet weld is determined by:
a) leg length of the largest equal leg triangle that may be drawn within the cross section of the weld.
b) measuring across the face of the weld.
c) a certified welding inspector.
d) the thickness of the material being welded.

Answer 10

a) leg length of the largest equal leg triangle that may be drawn within the cross section of the weld.

Question 11

To check the size of a convex fillet weld, you would measure:
a) leg length of the largest equal leg triangle that may be drawn within the
cross-section of the weld.
b) thickness of the material being welded minus 10% to account for weld metal convexity.
c) across the face.
d) length of the weld.

Answer 11

a) leg length of the largest equal leg triangle that may be drawn within the
cross-section of the weld.

Question 12

The size of groove welds is determined by the:
a) width between toes.
b) throat dimension.
c) included angle.
d) root radius.

Answer 12

b) throat dimension.

Question 13

What is the size of the groove weld in Figure 28?
a) 9.6 mm (3/8”)
b) 13 mm (1/2”)
c) 14 mm (9/16”)
d) 16 mm (5/8”)

Answer 13

b) 13 mm (1/2”)

Question 14

What may be done to reinforce welds made on a lap joint?
a) Place one more pass over the finished weld.
b) Avoid penetrating the root of the joint with weld metal.
c) Produce a concave-finish fillet weld.
d) Place plug or slot welds along the joint.

Answer 14

d) Place plug or slot welds along the joint.

Question 15

Why is it sometimes necessary to bevel joint edges prior to welding?
a) to prevent distortion
b) to obtain complete penetration
c) to make the job last longer
d) to provide a clear line to follow when welding

Answer 15

b) to obtain complete penetration

Question 16

Edge joints are most often used on:
a) sheet metal.
b) pipe.
c) sheet steels over 13mm (‘A”) thick.
d) castings.

Answer 16

a) sheet metal.

Question 17

Which of the following joint preparations on a given material thickness would
require the least amount of filler metal?
a) double U
b) double Vee
c) single Vee
d) single U

Answer 17

a) double U

Question 18

List three (3) reasons why excessive convexity on a fillet weld is considered a weld fault.

Answer 18

a) costly over welding which adds no strength to the joint
b) notch effect
c) can contribute to excessive distortion

Question 19

Which types of groove welds require only one member of the joint to be prepared?
a) square and bevel
b) Vee and J
c) bevel and J
d) U and J

Answer 19

c) bevel and J

Question 20

What is the main advantage of the lap joint?

Answer 20

No edge preparation is required.

Question 21

When using edge, comer and Tee joints, when should you consider preparing the joint edges?
a) when working with light-gauge sheet metal
b) when fabricating only with non-ferrous metals
c) when working with thicker materials where full penetration is desired
d) when preparing to weld the joint with GMAW

Answer 21

c) when working with thicker materials where full penetration is desired

Question 22

What does the G stand for when interpreting the 2G position?
a) grind before welding
b) groove weld
c) gas-shielded wire is required
d) see note G on the drawing for welding procedure details

Answer 22

b) groove weld

Question 23

What does the 3 stand for when interpreting the 3F position?
a) 3 passes required
b) overhead position
c) a 3rd year apprentice is allowed to weld this joint
d) vertical position

Answer 23

d) vertical position

Question 24

What is the primary factor in the selection of the joint type?
a) accessibility for welding
b) carbon content of the base metal
c) strength and loading requirements
d) available welding and cutting processes

Answer 24

c) strength and loading requirements

Question 25

Selecting a joint preparation that requires the least amount of filler metal would:
a) put welders out of business.
b) result in poor penetration.
c) make it very difficult to weld.
d) minimize distortion and lower cost factors.

Answer 25

d) minimize distortion and lower cost factors.