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VT Theory Questions (Level II)

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VT Theory Questions (Level II) Localized reduction in an area of a bolt that is under overload conditions is referred to as: a. sizing b. necking down c. erosion d. elongation - ✔✔b The least common location for fastener failure is: a. in the head to shank fillet b. throughout the first thread inside the nut on threaded fasteners c. in the mid grip d. at the transition from the thread to the shank - ✔✔c Discontinuities that are produced during the hot or cold working of the ingot into rod or bar to make studs are called: a. inherent discontinuities b. primary processing discontinuities c. secondary processing discontinuities d. service-induced discontinuities - ✔✔b Service-induced discontinuities in bolting systems may be produced by: a. vibration b. over-tensioning c. corrosion d. all of the above - ✔✔d The fillet weld size is based on the: a. effective fillet weld throat. b. length of fillet weld. c. theoretical throat. d. length of fillet weld leg. - ✔✔d A convex weld surface: a. curves inward b. curves outward c. contains a hollow d. does both a and c - ✔✔b During the solidification of metal, a hole produced due to escaping gases is called a: a. burst b. cold shut c. flaking d. blow hole - ✔✔d Weldments might contain: a. shrinkage b. incomplete penetration c seams d laps - ✔✔b A discontinuity typically found in forgings is: a. shrinkage b. bleed-out c laps d undercut - ✔✔c Embrittlement, caused by a physical or chemical change in the metal, is a reduction in: a. ductility b. hardness c. hydrogen d. all of the above - ✔✔a The deterioration of a metal by chemical or electrochemical reaction with its environment is called: a. corrosion. b. erosion. c. IGSCC. d. none of the above. - ✔✔a The roughest surface finish is indicated by a measurement of: a. 64 µin. b. 150 µin. c. 250 µin. d. 380 µin. - ✔✔d A basic metallurgical joint configuration that is used for complete joint penetration is called: a butt joint. b. a fillet joint. c. a lap joint. d. none of the above. - ✔✔a The welding process that is sometimes referred to as "stick welding" is: a. SAW b. SMAW c. GMAW d. GTAW - ✔✔b The welding process in which there is a higher degree of probability of entrapping slag is: a. GMAW b. GTAW c. SMAW d. all of the above - ✔✔c Tungsten inclusions arc found during: a. GMAW. b. GTAW. c. SMAW. d. none of the above. - ✔✔b The portion of base metal that has not been melted but where mechanical properties or microstructure have been altered by the heat of welding is defined as:

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