Cwb module 12 Study guides, Class notes & Summaries

MODULE 20, CWB: STRUCTURE and PROPERTIES of METALS1 The electron can be shared between two atoms. - correct answer 1. COVALENT BOND, pg 6 2. In a welding arc a large number of ions are created, certain elements with low ionization potential can be added to facilitate establishing a stable arc, or plasma. Among all these elements which one is the most presence in many electrode coatings? a. Helium b. Oxygen c. Aluminum d. Potassium - correct answer 2. answer D, table 3.1 3. An atom in t...

CWB 2 Module 17 Questions The property of liquids that makes them try to reduce their surface area is known as: A) Capillary action B) Surface tension C) Viscosity - correct answer B) Surface tension True or False? "The ability of a liquid to wet a solid surface can be measured in terms of the contact angle." - correct answer True The phenomenon by which water rises up a narrow tube or by which liquid can penetrate a crack is known as: A) Capillary action B) Surface tension C...

MODULE 20, CWB: STRUCTURE and PROPERTIES of METALS EXAM QUESTIONS WITH VERIFIED ANSWERS 11. Which alloy elements used in steel that has the highest strengthening effect ? a. Chromium b. Copper c. Carbon d. Nickel - Answer-11. answer C, fig 8.2 12. Of all the strengthening methods available which one that simultaneously improves strength and toughness ? a. Grain refinement b. Precipitation hardening c. Strain aging d. Solid solution stregthening - Answer-12. answer A, sect 8.4.1 ...

CWB Module 10 Questions and Answers Rated A+ Where do transverse cracks occur? (a) weld metal and base metal (b) weld metal only (c) base metal only (d) weld craters (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 (d) open to the surface and/or below the surface of weld Discontinuities are... (a) unwanted defects ...