Free API API-577 Exam Dumps Questions & Answers

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

• A.The welding inspector can simply make the change on the WPS and initial as proof of acceptance.
• B.Impact testing must be performed at the discretion of the welding engineer.
• C.It may be changed on the WPS without requalifying the welding procedure.
• D.The welding procedure will need to be requalified by performing mechanical testing.

Which of the following is a practical solution to eliminate or reduce porosity when welding carbon steel?

• A.Proper shielding
• B.Lower heat input
• C.Arc length control
• D.Reduce travel speed

General awareness of metallurgy is important to the welding inspector because:

• A.A thorough knowledge of weld metal structures is necessary to understand weldability.
• B.The crystalline structure of base metals affects the resulting structure of the weld.
• C.Physical properties of the final weldment can be significantly affected by preheat and postweld heat treatment (PWHT).
• D.Welding processes can affect both mechanical and corrosion properties of a weldment.

Eddy current can be used to measure the:

• A.Thickness of surface coatings or cladding thickness.
• B.Extent of bonding of coatings or claddings.
• C.Holidays in coatings or claddings.
• D.Thickness of parent metal below alloy metal claddings.

Steels usually require both preheat and PWHT if they have a carbon equivalent higher than:

• A.0.55
• B.0.35
• C.0.45
• D.0.50