Certification Exam Practice Questions And

ASME Pressure Vessel Welding Inspector Certification Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which ASME code section primarily governs the construction of

pressure vessels?

• Section IX
• Section V
• Section VIII
• Section II

Rationale: Section VIII of the ASME Boiler and Pressure Vessel Code

provides rules for the design, fabrication, inspection, and testing of pressure vessels.

• What is the primary purpose of a weld procedure specification (WPS)?
• To detail employee responsibilities 1 / 4

• To provide a detailed plan for welding to ensure quality
• To list the materials used
• To outline the inspection frequency

Rationale: The WPS is a document that guides welders in performing

welds correctly, specifying parameters such as technique, materials, and pre/post-weld requirements.

• Which type of NDT is most effective in detecting surface-breaking

cracks?

• Radiographic Testing (RT)
• Liquid Penetrant Testing (PT)
• Ultrasonic Testing (UT)
• Magnetic Particle Testing (MT)

Rationale: PT is designed to detect surface defects by using a

penetrant liquid that enters cracks and becomes visible after developer application.

• Which welding process is commonly used for pressure vessel

fabrication?

• Oxyacetylene Welding
• Shielded Metal Arc Welding (SMAW)
• Friction Welding
• Resistance Spot Welding

Rationale: SMAW is widely used in pressure vessel fabrication due to

its versatility and suitability for carbon and low alloy steels. 2 / 4

• What is the minimum required visual inspection of a weld?
• Checking weld color only
• Checking weld strength only
• Checking weld size, shape, and surface defects
• No inspection required

Rationale: Visual inspection ensures that welds meet code

requirements for size, contour, and surface defects such as cracks or porosity.

6. The term “PWHT” stands for:

• Pre-Weld Heat Treatment
• Post Weld Heat Treatment
• Pressure Welded Heat Test
• Partial Weld Heat Technique

Rationale: PWHT is performed after welding to relieve residual stress

and improve mechanical properties.

• Which NDE method uses high-frequency sound waves?
• Radiographic Testing
• Magnetic Particle Testing
• Ultrasonic Testing
• Liquid Penetrant Testing

Rationale: Ultrasonic Testing uses high-frequency sound waves to

detect internal flaws in materials. 3 / 4

• What is the primary purpose of a filler metal?
• To change the color of the weld
• To reduce welding heat
• To add material to the joint for strength
• To coat the surface

Rationale: Filler metal is used to fill the joint and ensure the weld has

sufficient strength and ductility.

• Which gas is commonly used for shielding in GMAW welding of carbon

steel?

• Oxygen
• Helium
• Argon-CO2 mixture
• Nitrogen

Rationale: An argon-CO2 mixture provides proper shielding to

protect the weld pool from atmospheric contamination during GMAW.

• What is the maximum allowable undercut depth for ASME

Section VIII welds?

• 1/32 inch
• 3/32 inch
• 1/16 inch
• 1/8 inch
• / 4