CWB Module 10 questions with complete solutions 2023/2024

CWB Module 10Where do transverse cracks occur? (a) weld metal and base metal (b) weld metal only (c) base metal only (d) weld craters - correct answer (a) weld metal and base metal Porosity may occur: (a) open to the surface of the weld only (b) in the heat-affected zone only (c) below the surface of the weld only (d) open to the surface and/or below the surface of weld - correct answer (d) open to the surface and/or below the surface of weld Discontinuities are... (a) unwanted defects (b) interruptions in the desirable physical structure of the weld (c) welds that are undesirable (d) welds that may cause harm to the structure - correct answer (b) interruptions in the desirable physical structure of the weld A defect is: (a) an undesirable interruption of a weld (b) a dimensional error that needs to be corrected (c) a discontinuity that represents a danger to fitness for service of weld or structure (d) an interruption in the desirable physical structure of the weld - correct answer (c) a discontinuity that represents a danger to fitness for service of weld or structure Fitness for service is a concept of weld evaluation that seeks a balance between (a) reliability and economy of welding procedure (b) quality of welding procedure (c) quality and reliability of welding procedure (d) quality, reliability and economy of welding procedure - correct answer (d) quality, reliability and economy of welding procedure Weld discontinuities are divided into these general classes (a) process or procedure related, metallurgical, and design related (b) process related, material, and conception (c) metallurgical and design related (d) procedure related, design related - correct answer (a) process or procedure related, metallurgical, and design related Dimensional errors are the direct result of (a) poor shop instructions (b) untrained employee (c) poor workmanship in operations (d) poor quality control - correct answer (c) poor workmanship in operations Working with CSA Standard W59 or AWS D1.1 a groove angle specified on a drawing as 60 degree is required to be between (a) 60 - 65 degree (b) 55 - 70 degree (c) 55 - 60 degree (d) 60 - 70 degree - correct answer (b) 55 - 70 degree Working with CSA Standard Z662 a groove angle specified on a drawing as 60 degrees is required to be between (a) 60 - 65 degree (b) 55 - 70 degree (c) 55 - 60 degree (d) 60 - 80 degree - correct answer (d) 60 - 80 degree CSA Z662 requires that abutting ends be aligned, the maximum allowable offset as specified for components with the same nominal wall thickness at the bevel is (a) 2 mm (b) 1.6 mm (c) 1 inch (d) 1/2 inch - correct answer (b) 1.6 mm Depending on the condition of the shear blades and lubricants used, various foreign materials may be entrapped leading to (a) porosity and incomplete joint penetration (b) insufficient effective throat thickness (c) porosity, slag entrapment and incomplete fusion (d) slag entrapment and incomplete fusion - correct answer (c) porosity, slag entrapment and incomplete fusion