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Welding Inspection and Metallurgy Questions 36–40 (page: 9)

Updated On: 10-Feb-2026

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QUESTION: 36

Which of the following is a hazard associated with in-service welding on a carbon steel pipe containing chlorine?

Explosion or unstable reaction with the addition of localized heat.
Exothermic decomposition or explosion.
Carbon steel will burn in the presence of chlorine and high heat.
Hydrogen released during welding process can initiate hydrogen-assisted cracking.

Answer(s): A

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QUESTION: 37

What increases when a welder increases the amperage?

Voltage
Arc length
Heat
Travel speed

Answer(s): C

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QUESTION: 38

What term is used to describe the mechanical working of metals using impact blows?

Hammering
Mechanical stress relieving
Needle gunning
Peening

Answer(s): D

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QUESTION: 39

A limitation of a stud arc welding (SW) process is:

Welding rates are significantly lower than those obtained with SMAW.
Process is primarily suitable for only carbon steel and low alloy steels.
Process is limited to a flat position.
Weld is not visible during the welding process.

Answer(s): C

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QUESTION: 40

Which of the following statements is true?

PQRs qualified on P8 materials also qualify for P1 materials.
Welding procedures must be supported by more than one PQR.
All PQRs must be qualified with impact testing.
One PQR may support several WPSs.

Answer(s): D

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