AWS Welding Inspection, Testing & Quality Control 3

Question 1

According to AWS D1.1, what is the minimum preheat temperature typically required when welding ASTM A36 steel with a thickness greater than 1.5 inches using a low-hydrogen process?

Accepted Answer

150°F (66°C)

Answer

AWS D1.1 requires a minimum preheat of 150°F (66°C) for Group I steels like A36 when thickness exceeds 1.5 inches with low-hydrogen electrodes.

Question 2

What is the primary purpose of a weld procedure qualification test (PQR)?

Accepted Answer

To demonstrate that the welding process produces a joint with the required mechanical properties

Answer

The PQR is a record of actual test results used to prove that a welding procedure specification (WPS) will produce welds meeting specified mechanical requirements.

Question 3

In magnetic particle testing (MT), what type of discontinuity orientation produces the strongest indication?

Accepted Answer

Perpendicular to the magnetic field

Answer

Discontinuities oriented perpendicular to the magnetic field lines cause the greatest flux leakage, producing the strongest and most detectable MT indication.

Question 4

What does the letter 'E' designate in an electrode classification such as E7018?

Accepted Answer

Electrode (filler metal rod)

Answer

In the AWS electrode classification system, 'E' stands for electrode, indicating a coated filler metal rod used in SMAW.

Question 5

Which welding inspection method is classified as a volumetric examination technique?

Accepted Answer

Radiographic testing (RT)

Answer

Radiographic testing is a volumetric method that can detect discontinuities throughout the entire thickness of a weld, not just at the surface.

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AWS Practice Test

AWS Welding Inspection, Testing & Quality Control 3