API 577 PRACTICE EXAM QUESTIONS AND CORRECT ANSWERS

None! Number of welds to RT is established by the primary code - correct answers How many welds does 577 require to be RT'd Arc blow - correct answers Deflection of an arc from normal path because of opposing magnetic forces Arc length - correct answers Distance from the tip of the welding electrode to the adjacent surface of the weld pool Autogenous - correct answers Welds made without filler metal Backing - correct answers Material or device placed on back side of a joint, to support and retain weld metal Defect - correct answers A discontinuity that does not meet acceptance criteria, term designates rejecability Discontinuity - correct answers The interruption of the typical structure of a material, discontinuity not necessarily a defect Inclusion - correct answers Entrapped foreign solid material, such as slag, flux, tungsten, or oxide Undercut - correct answers A groove welded into the base metal adjacent to the weld toe or weld root and left unfilled by weld metal Based on nature of the non-conformance - correct answers Corrective action of non-conformance SMAW - correct answers Which welding process is most widely used SMAW process - correct answers Arc between a covered electrode and weld pool. Heat of arc comes from tip of a consumable covered electrode. Shielding comes from decomposition of the electrode coating. SMAW (basic functions of electrode coating) - correct answers Shielding gas, prevent excessive grain growth, slag blanket to protect weld, sometime provides alloy elements GMAW-short circuit - correct answers Which welding process is "fast freezing and prone to have LOF" GMAW-spray transfer - correct answers Which welding process uses a direct stream of discrete drops Essential & Non essential, Supp Essential when toughness testing required - correct answers Variables required on WPS Essential, non essential are optional - correct answers Variables required on PQR Manufacturer or contractor (owner of procedure) - correct answers Who supervises the testing of PQR coupon (per section IX) Base metal, filler metal, fluxes & gases - correct answers What are welding materials To reduce # of PQR's - correct answers What is the purpose of P-numbers Usability characteristics - correct answers What is the basis for F-numbers Qualified with all electrodes with the same F-number, with CS also qualifies with other F-numbers - correct answers A welder who qualifies for a specific F-number is also qualified for what Titanium - correct answers What alloy is P-53 Analysis of chemical composition of the weld - correct answers What is the A-number Warm holding ovens - correct answers Some electrodes are stored in Separate from other electrodes - correct answers Low hydrogen electrode storage Discard - correct answers What to do with wet fluxes or electrodes Welder requalification - correct answers A change in WPQ essential variable requires Overlap, undercut also would be correct but not 1 of the 4 choices - correct answers Which discontinuity is at the toe of the weld UT - correct answers How best to find side wall LOF VT - correct answers Most extensively used NDE method for welds 6"-24" - correct answers VT visual exam distance 30 degrees - correct answers VT visual exam minimum angle 100 foot-candles - correct answers VT needed light intensity Perpendicular to discontinuity - correct answers MT-flux direction to best see discontinuity Deflect arc "Arc Blow" - correct answers Result of MT residual magnetism Chlorine & fluorine (code mention chlorine, sulfur and halogens) - correct answers PT on SS watch for Thickness of base metal plus reinforcement - correct answers What determines which IQI should be used Perpendicular across weld - correct answers Placement of wire type IQO Iridium 192 & Cobalt 60 - correct answers Typical RT sources .250-3" - correct answers Iridium 192 used on what thicknesses 1.5"-7.0" - correct answers Cobalt 60 used on what thicknesses Before and after use - correct answers When to calibrate for UT W/in 25 degrees of part examined - correct answers UT calibration block temp should be At least 30 minutes - correct answers Pressure test typical holding time per 577 Castings - correct answers Weld metal is similar to that of Portion of base metal that has not been melted but who's mechanical properties have been altered - correct answers What is the HAZ 1350 F - correct answers The HAZ for CS is parent metal not melted but exceeding what temp Toughness - correct answers Ability of material to absorb energy and deform plastically before fracturing Charpy impact test - correct answers One of most common tests for toughness