API-577 Welding Inspection and Metallurgy Exam Questions and Answers

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.

ONCE

TWICE

THREE TIMES

FOUR TIMES

0.05 - 2.7 ft./sec (0.015 - 0.82 m/sec)

1.3 - 4.0 ft./sec (0.40 - 1.20 m/sec)

2.3 - 3.3 ft./sec (0.70 - 1.00 m/sec)

4.1 - 5.5 ft./sec (1.25 - 1.68 m/sec)

Longitudinal groove

Incomplete fusion

Under fill

Undercut

GMAW-S

GMAW-SF

FCAW

FCAW-SW

An area next to the heat-affected zone that has suffered some softening and loss of strength.

The microstructure of the weld that has been melted and will therefore have properties more like a casting than the base metal.

An area near the heat-affected zone affected by welding that may experience intergranular corrosion.

The high residual stress zone adjacent to the weld fusion line that will have higher hardness than the weld or base material.

The bevel angle be wide enough to allow oscillation of welding torch.

The cooling rate be controlled in order to prevent rapid cooling.

Preheating is always performed to prevent hot cracking.

A wide face and thinner bevel be used.

Porosity and slag inclusions of the weld.

Cracking and corrosion resistance of the weld.

Strength and ductility of the weld.

Ductility and hardness of the weld.

The properties of the base metal.

The thickness of the metal.

The residual hardness of the weld joint.

The heat input during welding.

Groove angle

Joint penetration

The weld body

Complete penetration

Non-load-bearing welds.

Insulation and refractory pins.

Flat position welds.

Non-pressure-containing welds.

0.25 inch on either side of the fusion zone

0.25 inch away from the toe of the weld into the base metal

1 inch on either side of the centerline of the weld

Just adjacent to the toe of the weld

root opening.

root weld size.

groove weld size.

root face.

More susceptible to distortion during welding.

Less susceptible to cracking during welding.

More susceptible to brittle fracture.

Less susceptible to brittle fracture.

6 in. (150 mm)

12 in. (300 mm)

24 in.(600 mm)

36 in. (900 mm)

E7048-H4

E7048

E7018-A1

E7018

1.0

2.0

3.0

4.0

WPS/PQR aspects of in-service welding.

Technical aspects of hot tapping.

Safety aspects of in-service welding.

Weldability aspects of in-service welding.

Yield strength.

Hardness.

Ultimate tensile strength.

Toughness.

Chemical composition.

Strength of the electrode.

Coating characteristics.

Operating characteristics.

Good perception and the inspection would be approximately equal to a direct visual exam.

Sensitivity to find possible defects that a direct visual exam would produce.

A resolution at least equivalent to that which is attained by direct visual examination.

A greater acuity than the eye and the inspection would be better than a direct visual.

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.

Lamellar tearing

Hydrogen cracking

Sulfite stringers

Hot cracking

Excessive distortion

Tendency of weld pool to be sluggish

Deflection of the weld arc

Solidification cracking

Short circuiting transfer

Pulsed droplet transfer

Globular transfer

Spray transfer

Chemical composition of the deposited weld metal.

Comparable base metal ultimate strength values.

Weldability characteristics of the metal.

Type and strength of base metal.

Coating characteristics.

Chemical composition.

Strength of the filler metal.

Welding position.

Re-qualify the PQR.

Re-qualify the WPS.

Record the change on the existing WPS.

List the change as a supplement to the WPS.

The surface of a joint member included in the groove.

A separation at the joint root between the work pieces.

The beveled surface of the joint members.

That portion of the groove face adjacent to the joint root.

GMAW-S

GTAW

GMAW

FCAW