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API API-577 - Welding Inspection and Metallurgy Exam

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Total 110 questions

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.

Which of the following is a hazard associated with in-service welding on a carbon steel pipe containing chlorine?

A.

Explosion or unstable reaction with the addition of localized heat.

B.

Exothermic decomposition or explosion.

C.

Carbon steel will burn in the presence of chlorine and high heat.

D.

Hydrogen released during welding process can initiate hydrogen-assisted cracking.

In magnetic particle examination, the yoke is placed parallel to the weld to detect cracks:

A.

In the undercutting.

B.

Parallel to the weld.

C.

Transverse to the weld.

D.

In the HAZ.

The weld symbol represents which type of weld groove?

A.

Parallel

B.

Scarf

C.

Flare

D.

Bevel

The direction of magnetic flux can be confirmed by the use of a:

A.

Pie gauge.

B.

Magnetic-field-sensitive crayon.

C.

Flux line sensitizer.

D.

Calibration gauge.

One of the main differences between welding nickel alloys and austenitic stainless steels is that with nickel alloys:

A.

Interpass temperature control is not needed.

B.

There is less susceptibility to cracking from contaminants.

C.

There is less susceptibility to lack of fusion.

D.

The weld pool tends to be sluggish.

What increases when a welder increases the amperage?

A.

Voltage

B.

Arc length

C.

Heat

D.

Travel speed

A limitation of a stud arc welding (SW) process is:

A.

Welding rates are significantly lower than those obtained with SMAW.

B.

Process is primarily suitable for only carbon steel and low alloy steels.

C.

Process is limited to a flat position.

D.

Weld is not visible during the welding process.

Items to be included in the WPS for GMAW process are:

A.

Joint design and test coupon thickness.

B.

Base metal P-number and deposited metal thickness.

C.

Type of welding process and test coupon thickness.

D.

Electrode-flux class and electrical characteristics.

When radiographic examination is used for welder qualification utilizing the GMAW-S process, the minimum length of the test coupon to be examined is:

A.

Radiographic examination is not allowed.

B.

The entire weld circumference for pipe coupon.

C.

36 in. for welder operator qualification.

D.

6 in. for welder qualification.