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Free API API-577 Practice Exam with Questions & Answers

Questions 1

What increases when a welder increases the amperage?

Options:
A.

Voltage

B.

Arc length

C.

Heat

D.

Travel speed

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Questions 2

Remote examination of welds may use aids such as telescopes, borescopes, fiberscopes, cameras, or other suitable instruments provided they have:

Options:
A.

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

B.

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

C.

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

D.

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

Questions 3

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

Options:
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.

Questions 4

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

Options:
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.

Questions 5

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

Options:
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.

Questions 6

In alloy steel, a high hardness measurement could indicate:

Options:
A.

A correlation to a low tensile strength.

B.

The presence of untempered martensite.

C.

The Brinell test device was struck too hard with the hammer.

D.

The presence of tempered martensite.

Questions 7

What does an AWS classification number identify?

Options:
A.

Electrode diameter and strength

B.

Electrodes and welding rods

C.

Chemical composition of the deposited weld metal

D.

Base metal and group number

Questions 8

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

Options:
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.

Questions 9

Which welding process produces a fast-freezing weld pool and is generally suited for joining thin sections or root passes?

Options:
A.

GMAW-S

B.

GTAW

C.

GMAW

D.

FCAW

Questions 10

A-number groupings are based upon the:

Options:
A.

Chemical composition of the deposited weld metal.

B.

Comparable base metal ultimate strength values.

C.

Weldability characteristics of the metal.

D.

Type and strength of base metal.

Exam Code: API-577
Certification Provider: API
Exam Name: Welding Inspection and Metallurgy Exam
Last Update: Mar 26, 2025
Questions: 110

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