Certified Welder Welding Codes and Standards 2

Question 1

Under AWS D1.1, what is the minimum preheat temperature required for ASTM A36 steel with thickness greater than 1.5 inches when welding with SMAW?

Accepted Answer

150°F (65°C)

Answer

AWS D1.1 Table 4.5 requires a minimum preheat of 150°F for A36 steel over 1.5 inches thick when using SMAW.

Question 2

Which ASME code section specifically governs the welding of pressure vessels?

Accepted Answer

Section VIII

Answer

ASME Section VIII covers unfired pressure vessels, while Section IX covers welding and brazing qualifications.

Question 3

What does the term 'essential variable' mean in the context of a Welding Procedure Specification (WPS)?

Accepted Answer

A variable whose change requires requalification of the procedure

Answer

An essential variable is one whose change beyond allowed limits requires a new procedure qualification record (PQR).

Question 4

According to AWS D1.1, visual inspection of a weld must be performed by a person with minimum vision of:

Accepted Answer

20/40 corrected or uncorrected vision in at least one eye

Answer

AWS D1.1 requires the inspector to have 20/40 minimum vision (corrected or uncorrected) in at least one eye.

Question 5

A Procedure Qualification Record (PQR) documents the:

Accepted Answer

Variables used and test results from a qualification weld

Answer

A PQR records the actual welding variables used during qualification testing and the test results that support the WPS.

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