API-577 Welding Inspection and Metallurgy Exam Questions and Answers

MT

UT

ET

RT

1.0

2.0

3.0

4.0

A lighter density in the center of the width of the weld image, either extended along the weld or in isolated circular drops.

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

An abrupt density change across the width of the weld image with a straight longitudinal darker density line at the center of the width of the weld image along the edge of the density change.

A localized darker density with fuzzy edges in the center of the width of the weld image.

Chemical composition.

Tensile strength to be higher than the base metal.

Acceptability of physical properties.

Need for postweld heat treatment (PWHT).

Interpass temperature control is not needed.

There is less susceptibility to cracking from contaminants.

There is less susceptibility to lack of fusion.

The weld pool tends to be sluggish.

A definition of welds that should be inspected in refinery and chemical plant equipment.

A definition of specific techniques and practices that should be used for welding inspection.

Guidance on the extent and scope of inspection required for specific types of welds.

Guidance on welding inspection during the fabrication and repairing of refinery equipment and piping.

Nozzles, ring-grooves, and grind-out areas.

Lap joint welds and uphill welding.

Butt welds (single and double bevel) and plug welds.

Fillet welds, J-welds, and seal welds.

1 ft. (300 mm)

2 ft. (600 mm)

3 ft. (900 mm)

4 ft. (1200 mm)

Minimize the number of performance qualifications.

Minimize the number of welding procedure qualifications.

Define the welding characteristics.

Designate similar chemical compositions.

Yes, but only for thicknesses greater than .280"

No, the material thickness on the PQR should be .375"

Yes, the PQR qualifies the ranges as stated on the WPS

No, the PQR thickness should have been .560"

PQRs qualified on P8 materials also qualify for P1 materials.

Welding procedures must be supported by more than one PQR.

All PQRs must be qualified with impact testing.

One PQR may support several WPSs.

Chemical composition of the deposited weld metal.

Comparable base metal ultimate strength values.

Weldability characteristics of the metal.

Type and strength of base metal.

Voltage

Arc length

Heat

Travel speed

1050°F (556°C)

1150°F (621°C)

1250°F (677°C)

1350°F (730°C)

Ground to a smooth contour.

Cleaned down to the bare metal.

Cleaned to remove surface scale and flux.

Clean, flat area or even flush with the base metal.

WPS/PQR aspects of in-service welding.

Technical aspects of hot tapping.

Safety aspects of in-service welding.

Weldability aspects of in-service welding.

Impact testing

There is no single test

Weld tension tests

Bend testing

GMAW-S

GMAW-SF

FCAW

FCAW-SW

Pie gauge.

Magnetic-field-sensitive crayon.

Flux line sensitizer.

Calibration gauge.

Hammering

Mechanical stress relieving

Needle gunning

Peening

Re-qualify the PQR.

Re-qualify the WPS.

Record the change on the existing WPS.

List the change as a supplement to the WPS.

Longitudinal groove

Incomplete fusion

Under fill

Undercut

It is more sensitive to drafts and wind than GMAW.

It has lower deposition rates than SMAW.

Shielding must always be provided by an externally supplied gas.

Large volumes of welding fumes are generated.

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

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

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

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

Required welding procedure specifications.

Required welding procedure qualifications.

Required procedure and performance qualifications.

Required mechanical tests.

Parallel

Scarf

Flare

Bevel

Arc drift.

Arc strike.

Arc blow.

Arc deflection.

Deposition rates are lower than GMAW.

The process cannot be used in areas of limited access.

It has low tolerance for contaminants.

The process is sensitive to wind and draft.

Three out of four of the required test specimens must pass.

The test coupon fails and a new coupon is required.

Two additional test specimens from the coupon must be tested and pass.

The WPS fails.

bevel face.

bevel angle.

groove angle.

groove face.