Deck 14: Back or Backing and Melt Thru Welds

Question 1

A back or backing weld is easily distinguished when a multiple ____ line is used.

A) dimension
B) join
C) reference
D) extension

Answer 1

C

Question 2

When a backing weld or a melt-thru weld is to have a(n) ____________________ finished convex contour, this is indicated by adding the convex contour symbol and the finish abbreviation to the backing, back, or melt-thru symbol.

Answer 2

mechanically

Question 3

The ____________________ weld is applied first and then the groove weld is made.

Answer 3

backing

Question 4

The melt-thru symbol is used in the same manner and has the same significance for flange welds as it does for groove welds.

Question 5

A height of reinforcement dimension is placed to the ____ of the melt-thru symbol.

A) left
B) right
C) bottom
D) top

Question 6

In the case of a back weld, the back weld is made first and then a groove weld is applied.

Question 7

A ____ of reinforcement dimension may be applied to the melt-thru symbol.

A) degree
B) height
C) level
D) depth

Question 8

The melt-thru symbol differs from the backing symbol in that it is shown as a solid.

Question 9

A ____ weld is distinguished from a backing weld only by its sequence of application with respect to the face side of the groove weld.

A) front
B) back
C) fill
D) groove

Question 10

Back or backing and melt-thru welds are frequently used with groove welds to strengthen the weld on the opposite side of the joint.

Question 11

The melt-thru symbol cannot be used for flange welds.

Question 12

The ____ symbol is included with the study of the back or backing symbol because of its similarity in shape and the way in which it is applied.

A) melt
B) blend-thru
C) join-thru
D) melt-thru

Question 13

The back and backing welds are the same and are shown by the same symbol and either is specified by including a reference in the ____________________ of the welding symbol,