Free API API-577 Exam Questions

Become API Certified with updated API-577 exam questions and correct answers

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Total 112 Questions | Updated On: Jun 17, 2026

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Question 1

Crater cracks typically occur:

A : In weld metal at the point where the arc terminates.

B : In the HAZ at the point where the arc initiates.

C : In weld metal at the point where the arc initiates.

D : In the HAZ at the point where the arc terminates.

Answer: A

Question 2

A-number groupings are based upon the:

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.

Answer: A

Question 3

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.

Answer: D

Question 4

To reduce the possibility of cracking, which of the following maximum hardness levels is required for weldments in wet H2S service?

A : HRC 20

B : HRC 22

C : HRC 25

D : HRC 32

Answer: B

Question 5

What is the purpose of the IQI?

A : Determining that the required sensitivity of the radiograph is achieved

B : Marking the radiographs with a definite identifying characteristic

C : Ascertaining how much radiation the source has penetrated the material

D : Establishing the depth that the radiation source penetrates

Answer: A

Page: 1 / 23

Total 112 Questions | Updated On: Jun 17, 2026

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