Free Practice Questions for API-577 Exam

Question 1

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

ARadiographic examination is not allowed.

BThe entire weld circumference for pipe coupon.

C36 in. for welder operator qualification.

D6 in. for welder qualification.

Correct Answer: D. 6 in. for welder qualification.

Question 2

Rules for qualifying welding operators using radiography on a production weld require what minimum weld length to be examined?

A6 in. (150 mm)

B12 in. (300 mm)

C24 in. (600 mm)

D36 in. (900 mm)

Correct Answer: B. 12 in. (300 mm)

Question 3

In alloy steel, a high hardness measurement could indicate:

AA correlation to a low tensile strength.

BThe presence of untempered martensite.

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

DThe presence of tempered martensite.

Correct Answer: B. The presence of untempered martensite.

Question 4

What does an AWS classification number identify?

AElectrode diameter and strength

BElectrodes and welding rods

CChemical composition of the deposited weld metal

DBase metal and group number

Correct Answer: B. Electrodes and welding rods

Question 5

Items to be included in the PQR for the SMAW process are:

AWelding process used and AWS classification numbers.

BWelding process used and P-numbers of coupon welded.

CP-numbers of coupon welded and AWS classification numbers.

DElectrode-flux class and electrical characteristics.

Correct Answer: B. Welding process used and P-numbers of coupon welded.

Question 6

What is the maximum temperature at which ACFM may be used?

A300F (150C)

B500F (260C)

C900F (480C)

D1000F (540C)

Correct Answer: B. 500F (260C)

Question 7

Heating a round bar to an elevated temperature and then quenching one end is a test method to determine:

AHardenability.

BTemper embrittlement.

CHeat treatability.

DThermal conductivity.

Correct Answer: A. Hardenability.

Question 8

The change in shape (deformation) that a test specimen experiences when it is stressed or loaded is called:

AYield.

BStrain.

CStress.

DPlasticity.

Correct Answer: B. Strain.

Question 9

What is(are) the most appropriate action(s) to prepare an in-service carbon steel piping system that has been in caustic service for welding?

ANeutralize and clean the surface within 6 in. (150 mm) of weld bevels

BSteam out the piping system and dry

CVerify with pH paper that any surface liquid is ''basic'

DGrind the surfaces near the bevel to remove contaminants

Correct Answer: A. Neutralize and clean the surface within 6 in. (150 mm) of weld bevels

Question 10

As a result of welding, metals with a high coefficient of thermal expansion are:

AMore susceptible to distortion during welding.

BLess susceptible to cracking during welding.

CMore susceptible to brittle fracture.

DLess susceptible to brittle fracture.

Correct Answer: A. More susceptible to distortion during welding.