W59 Rev.1 Questions and Answers 100% Pass

W59 Rev.1 Questions and Answers 100% Pass CSA Standard W59 contains provisions for which of the following welding processes? SMAW, GMAW, SAW, SW, FCAW, EGW, ESW, MCAW The provisions of CSA Standard W59 are not intended for use with steels having a specified minimum yield strength of over 700 Mpa (100,000 psi). True What is a low hydrogen electrode? An electrode depositing weld metal having a specified maximum limit to the diffusible hydrogen content. "Contractor" refers to: The fabricator or erector who performs the welding CSA W59 contains requirements for stud welding. True Clause 10 has details of joint geometry for joints, which are prequalified, providing that welding procedures also conform to Clauses 4, 5 & 10 of CSA W59. Prequalified joints are included in CSA W59 for which of the following welding processes? FCAW, SMAW, GMAW (spray transfer mode), MCAW (spray transfer mode), SAW, GTAW Steel based metals must conform to the requirements of CSA or ASTM standards or other recognized specifications of equivalent welding quality approved by the engineer. True What info must be included in design drawings? All info necessary for preparation of fabrication and erection drawings What info must be shown on erection and fabrication drawings? Location, type, size & length of all welds, Shop & field welds, Groove depth and geometry if the weld is a partial joint penetration groove weld, any special fabrication procedures required such as the welding sequence What types of welds does CSA w59 cover? Groove, Fillet Welds, Plug & Slot Welds What is a complete joint penetration groove weld? A weld having fusion of weld and base metal throughout the thickness of the joint A partial joint penetration groove weld is defined as one having joint penetration that is less than complete. True Single fillet and single partial joint penetration groove welds shall not be subjected to bending about the longitudinal axis of the weld if tension is produced at the root of the weld. True What is the effective weld length of any groove weld, perpendicular or skewed to the direction of stress? The width of the part joined All flare bevel groove welds in butt joints made from one side are classified as partial joint penetration grooves. False, the may be partial or complete What is the effective throat thickness for flare bevel groove welds on a solid bar when filled flush to the surface of the bar? Three-tenths of the radius of the bar What is the effective length of a fillet weld? The overall length of the full-size fillet including end returns What is the minimum fillet size required when joining a 12 mm (1/2") plate to a 20 mm (3/4") plate? 6 mm (1/4") What is the minimum effective length of a fillet weld? 38 mm (1 ½") or 4 times the fillet, whichever is larger What is the maximum fillet weld size that shall be detailed along the edges of a material? The thickness of the material, for materials less than 6 mm (1/4") thick and the thickness of the material less 2 mm (1/16"), for material 6mm or more in thickness that has not been detailed to be built to obtain the full throat thickness The operator and the work shall be adequately protected against the direct effect of the wind, rain, and snow and all necessary means shall be provided to enable the operator to work in reasonable comfort. True Below what ambient temperature shall no welding be done without the express consent of the engineer? -18°C (0°F) The size, length & location of welds shall be: Not less than those specified by design requirements & detail drawings, nor shall they be substantially in excess of those requirements without approval of the engineer. Back gouging shall conform to the geometry of prequalified single U joint. True Electrodes must: Conform to CSA W48 or the applicable AWS A5 Standard All low hydrogen electrodes shall be delivered in sealed containers? True A container of low alloy steel electrodes has been delivered in a damaged condition. What shall be done with the electrodes? They shall be baked for at least one hour at a temperature between 370°C & 430°C (700°F & 800°F) before being used A batch of low hydrogen electrodes has become wet. At what temperature must they be baked at to remove the moisture? Wet low hydrogen electrodes cannot be rebaked. They must be discarded At what minimum temperature shall low hydrogen electrodes be stored immediately after being removed from sealed containers or from drying ovens? 120°C (250°F) How many times can low hydrogen electrodes be rebaked? Once The separation between parts to be joined by fillet welds shall normally not exceed: 5 mm (3/16") What is the maximum gap permitted between faying surfaces of lap joints? 2 mm What is the workmanship tolerance on a groove angle of a joint? +10, -5 Tack welds that are incorporated into the final weld shall be made with electrodes meeting the requirements of the final welds and shall be cleaned thoroughly. True Shall Seal welds be included in any strength calculations. No A welding procedure sequence shall be such to minimize distortion and shrinkage when welding reinforcing parts to members. True The direction of general progression in welding on a member shall be from points that are relatively fixed to points that have greater relative freedom of movement. True Under what conditions may preheat temperatures that are above the minimum shown in Table 5.3 be required? For highly restrained welds, For High strength weld metal, For joints where transfer of tensile stress occurs in the through-thickness direction of the material Preheat temperatures lower than shown in Table 5.3 may be used. True What is the minimum preheat temperature required for welding a 40 mm (1 ½") thick 300W (44W) steel with a low hydrogen electrode? 10°C (50°F) What is the maximum allowable groove weld reinforcement on a butt joint? 3 mm (1/8") What corrective action must be taken for excessive convexity? Reduce by removal of excess weld Under what conditions may peening be used on a weld? Only under the supervision of the engineer responsible for welding Slag shall be removed from all finished welds and before welding over previously deposited metal. True Arc strikes outside of the area of permanent welds should be avoided on any materials. True The welding inspection organization shall be notified, in advance, of the start of any welding operations. True Who is responsible for all of the quality control requirements of this standard? The Contractor What type of weld is suitable for inspection by RT? Groove welds in butt joints What is the minimum recommended material thickness for which the radioactive isotope Ir192 may be used for RT on a steel weld? 12 mm (1/2") What is to be done before welding on existing structures? Clean thoroughly all foreign matter, including paint film in the area immediately adjacent to the weld Clause 10 contains provisions for prequalified joints for which of the following welding processes: SMAW, SAW, FCAW, GMAW (spray transfer mode), MCAW (spray transfer mode) What is the maximum size SMAW electrode that is permitted under any conditions for welding prequalified joints? 8 mm (5/16') Clause 11 supplements Clauses 1 through 10 and covers the: Design and construction of statically loaded steel structures Side or end fillet welds terminating at ends or sides, respectively, of parts or members shall, wherever practicable, be returned continuously around the corners for a distance of at least twice the nominal size of the weld. True Under clause 11 extensions or run off bars used at termination of a groove welds need not be removed unless required by the engineer. True Under Clause 11 steel backing in groove welds need not be removed unless required by the engineer. True The visual inspection of completed welds is optional. False Craters are not considered a weld defect in statically loaded structures. False Clause 12 supplements clauses 1 through 10 and covers the: Design and construction of cyclically loaded steel structures Under Clause 12 extensions or run off bars used in groove welds shall be removed upon completion of welding. True Under Clause 12, steel backing of welds that are transverse to the direction of the applied load shall be removed and the joint shall be ground or finished smooth. True Visible porosity in groove welds is not a consideration in cyclically loaded structures. False This Standard (W59) applies to the welding of base metals: 3 mm (1/8 in) and thicker. In cases where base metals less than 3 mm (1/8 in) thick are to be welded to base metals 3 mm (1/8 in) and thicker, the requirements of __________________________ apply. AWS D1.3/AWS D1.3M and this Standard. Steel base metal to be welded under this Standard (W59) shall conform to the requirements of: CSA G40.21 Can Groove and fillet welds be used to transmit any combination of loads using the factored resistances as defined in Clause 11.3 for statically loaded structures or as defined in Clause 12.3 for cyclically loaded structures. Yes Fillet welds may be used in joints with fusion faces forming an included angle of what °? 60° to 135° Can Angles less than 60° be used? Yes, however, in such cases the weld shall be considered to be a partial joint penetration groove weld. Shall angles over 135° be relied upon to transmit calculated loads. No Temporary welds shall be in accordance with approved welding procedures. When shall they be removed? When required by the engineer. When temporary welds are removed, shall the surface be made flush with the original surface. Yes The classification and size of electrode, arc length, voltage, and amperage shall be suited to the thickness of the material, type of groove, welding position, and other circumstances associated with the assembly. True or False? True Before the start of welding on a member or structure in which shrinkage stresses or distortion are likely to affect the adequacy of the structure, a program for welding sequence and distortion control shall be developed by who? The contractor For fillets with unacceptable weld profiles. Except at outside corner joints, the convexity shall not exceed what value? 0.07W + 1.6 (W is the actual face width of the weld in mms) How much should each spot radiograph show of weld length with the weld image centered on the spot? At least 100 mm (4 in) When a spot radiograph, representative of a given unit length of weld, shows a defect(s). Defect(s) shall be traced for repair. How many additional spots on the same unit length of weld shall be selected to properly sample the remainder of the original unit length of weld? 2 Personnel performing ultrasonic examination shall be certified to Level 1, 2, or 3 in ultrasonic testing in accordance with CAN/CGSB 48.9712. Who shall Level 1 certified personnel operate under? Only under the supervision of Level 2 or 3 certified personnel. The Angle Beam search unit shall produce a sound beam in the material being tested within what degree of the following proper angle: 70°, 60°, or 45°? ±2° All surfaces to which an Angle Beam search unit is applied shall be free from weld spatter, dirt, grease, oil, and loose scale and shall have a contour permitting intimate coupling. Are tight layers of paint to be removed? Not unless the thickness exceeds 0.25 mm (10 mils). Are all provisions of this Standards (W59), applicable to new welded structures, apply equally to the strengthening and repairing of existing structures, except as modified in Clause 9? Yes This plan shall include, but not be limited to, design, workmanship, inspection, and documentation. Who shall prepare a comprehensive plan for the work? The engineer Where shall you find the maximum size of electrode, the maximum thickness of layers and the maximum size for one pass fillet welds? Table 10.1. Shall ordinary bolts or high strength bolts used in bearing-type connections be considered as sharing the load in combination with welds in the same shear plane?-No, Welds, if used, shall be provided to carry the entire load in the connection. The size of fillet welds on top of groove welds, when required for smoother transition in T and corner joints, shall be not less than what?-t/4 but need not be more than 10 mm (3/8 in). A weld subject to visual inspection shall be considered acceptable if visual inspection shows that frequency of visible porosity in fillet welds does not exceed one in each (a)_________ of length and the maximum diameter does not exceed (b)___________. (a)100 mm (4 in) (b) 2.5 mm (3/32 in) Independent of the requirements of Items a), b), and c), the sum of the greatest dimensions of porosity and fusion type defects less than 2 mm (1/16 in) in greatest dimension shall not exceed _________ in any linear 25 mm (1 in) of weld? 10 mm (3/8 in) Except with the express consent of the engineer, there shall be no temporary welds in fracture critical members and primary tension members. When such temporary welds have been used, they shall be removed, ground smooth, and examined using magnetic particle or liquid penetrant inspection methods. Temporary welds at other locations shall be shown on fabrication and erection documents and shall be made with E49XX low hydrogen electrodes or electrodes with diffusible hydrogen designators of H16 or less. True or False? True