CWB 2 Module 12 well answered graded A+ 2023/2024

CWB 2 Module 12 When a metal is subjected to load, it will be resisted by internal forces within the metal. The intensity of these forces through a given plane is known as ___________. - correct answer Stress Select the three ways in which a load can act on a cross-sectional area in a body. A) Perpendicular B) Tension C) Angular D) Compression E) Helixial F) Shear - correct answer B) Tension, D) Compression, F) Shear True or False? "Strain is the extension divided by the original length." - correct answer True The modulus of elasticity, E, for steel is usually taken as: A) 2,000 MPa B) 200,000 MPa C) 200 MPa D) 2,000,000 MPa C) 29,000 MPa - correct answer B) 200,000 MPa If a plot of stress against strain is made for a bar that undergoes plastic deformation, the stress at which a permanent set is first recorded when the bar is unloaded is known as: A) Permanent set B) Strain C) The elastic limit D) The proportional limit - correct answer C) The elastic limit True or False? "Stress is the load divided by the original cross-sectional area." - correct answer True To carry out tensile test, special machines are needed to exert the necessary force. They are generally two types: _______________ and ______________. - correct answer Mechanical and Hydraulic If it is desired to measure the strain during a test, an ____________ is placed on the specimen. - correct answer Extensometer Name the three types of guided bend test. - correct answer Face Bend, Root Bend, Side Bend After bending, the welds are examined for flaws or cracks. It is a condition of almost all codes that the specimens shall be considered to have failed if, on examination of the convex surface after bending, there is a crack or open defect exceeding _____ mm in length measured in any direction - correct answer 3mm What is the purpose of a nick-break test? - correct answer To reveal internal weld defects True or False? "A hardness test indicated whether the material may be readily weldable." - correct answer True Name three types of hardness testing machines. - correct answer Brinell, Rockwell, Vickers