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When welding using the GTAW process, which of the following best describes the appearance of a transverse crack on a radiograph?

A.

A feathery line of longitudinal orientation located at the center of the weld image.

B.

Elongated lines of darker density, irregular in width, and slightly winding in the lengthwise direction.

C.

A feathery, twisted line of darker density running across the width of the weld.

D.

An irregular darker line near the center of the width of the weld image along the edge of the root pass image.

If a nonessential variable is changed on a WPS, which of the following actions must occur?

A.

The welding inspector can simply make the change on the WPS and initial as proof of acceptance.

B.

It may be changed on the WPS without requalifying the welding procedure.

C.

The welding procedure will need to be requalified by performing mechanical testing.

D.

Impact testing must be performed at the discretion of the welding engineer.

For what maximum outside diameter may a radiographic technique be used in which the radiation passes through two walls and the weld in both walls is viewed for acceptance?

A.

1.5 in. (38.0 mm)

B.

2.5 in. (63.5 mm)

C.

3 in.(76.2 mm)

D.

3.5 in. (90.0 mm)

When performing a carbon steel to carbon steel hot tap where the CE of one of the metals is greater than 0.42%, which of the following electrodes should be used?

A.

E7048-H4

B.

E7048

C.

E7018-A1

D.

E7018

Codes/standards sometimes specify impact testing of weldments at minimum design metal temperatures to:

A.

Assure that the welded material has sufficient yield strength to avoid brittle fracture.

B.

Assure that the welded material has sufficient ductility to assist brittle fracture.

C.

Assure that the welded material has sufficient toughness to resist brittle fracture.

D.

Assure that the welded material has sufficient tensile strength to avoid failure at design loads.

Which term is used to describe a groove melted into the base metal adjacent to the weld toe or weld root and left unfilled by weld metal?

A.

Longitudinal groove

B.

Incomplete fusion

C.

Under fill

D.

Undercut

At least how far on each side of the weld should preheat be maintained?

A.

2 in. (5.1 cm)

B.

3 in. (7.6 cm)

C.

4 in. (10.2 cm)

D.

6 in. (15.2 cm)

Hot tapping and in-service welding should be carried out only with:

A.

Steels that have a carbon equivalent below 0.30.

B.

Cellulosic-type electrodes to reduce penetration.

C.

Low-hydrogen consumables and electrodes.

D.

Low-hydrogen root pass and cellulosic weld out.

Which welding process has been associated most with lack of fusion with shop-fabricated piping?

A.

GMAW-S

B.

GMAW-SF

C.

FCAW

D.

FCAW-SW

What is the minimum liquid level that should be maintained above the area that is to be hot tapped on a storage tank or vessel?

A.

1 ft. (300 mm)

B.

2 ft. (600 mm)

C.

3 ft. (900 mm)

D.

4 ft. (1200 mm)