CWB Level 2 Closed Book Questions and Answers 100% Pass

CWB Level 2 Closed Book Questions and Answers 100% Pass To measure the strength of a welded joint what mechanical test would you prescribe? a) A transverse weld tension test. b) A charpy test. c) A CTOD test. d) An all weld metal tension test. e) A side bend test. a) A transverse weld tension test. Select the cutting process that would provide the narrowest heat affected zone when cutting 12.5 mm (0.5 in) thick carbon steel. a) Oxy-acetylene cutting. b) Air-carbon arc cutting. c) Oxy-propane cutting. d) Plasma arc cutting. e) Laser beam cutting e) Laser beam cutting Which of the following refers to a welder test where a pipe assembly is placed vertically and the joint welded in the horizontal position without rotating the assembly? a) 1G b) 2G c) 3G d) 5G e) 6G b) 2G Which of the following imperfections is normally considered as unacceptable regardless of size or location? a) Porosity. b) Crack. c) Inadequate penetration. d) Lamination. e) Burn-through. b) Crack. Select the correct penetrameter thickness for 2% sensitivity when radiographing a weldment 1.25 inches in thickness. a) 0.012 in. b) 0.015 in. c) 0.025 in. d) 0.030 in. c) 0.025 in. Which of the following statements concerning porosity is true? a) Porosity cannot be trapped within a weld. b) Porosity moves up through later passes and will show only in a final pass. c) Porosity is restricted to the centre line of a weld. d) Porosity can result from faulty welder technique. e) Porosity can be dissipated by an appropriate heat treatment. d) Porosity can result from faulty welder technique. An irregular, dense white spot is seen on the radiograph of a weld. Assuming it was caused by the welding process used, which one of the processes below would be responsible? a) SMAW process. b) GTAW process. c) GMAW process. d) ST process. e) ESW process. b) GTAW process. Which of the following operations is known to result in the emission of ionizing radiation at levels dangerous to human health? a) Shielded metal arc welding. b) Plasma arc welding. c) Operation of high voltage portable generator sets. d) Radiographic inspection. e) Electroslag and electrogas welding. d) Radiographic inspection. The ultrasonic transducer is pressed against the plate of a welded joint. The sound travels longitudinally through the plate to the opposite side. The signal seen on the UT screen that comes from this opposite side of the plate: a) Is the initial pulse signal. b) Is the back reflection signal. c) Is the front reflection signal. d) Must be equal in amplitude to any defect signal. e) Cannot be used for establishing the thickness of the material under test. b) Is the back reflection signal. Which of the following is a stainless steel electrode? a) E4918-1 b) E4918-A1 c) E4818 d) E308-16 e) E4111 d) E308-16 Reverse polarity refers to the use of a: a) AC power source, electrode + b) DC power source, electrode + c) AC power source, electrode - d) DC power source, electrode - b) DC power source, electrode + Which welding process(es) can result in metallic inclusions in the weld? a) SMAW. b) FCAW. c) GMAW. d) GTAW. e) SAW d) GTAW. In producing a drawing for a scale of 1:50, what would be the distance represented by a distance on the drawing of 6 cm? a) 12 cm. b) 30 cm. c) 50 cm. d) 240 cm. e) 300 cm. e) 300 cm. As a general rule, weld discontinuities detected by ultrasonic testing are accepted or rejected on the basis of: a) Vertical linearity. b) Time base analysis. c) Horizontal response data. d) Noise to signal ratio. e) Signal amplitude. e) Signal amplitude. An advantage of an AC welding circuit is: a) It is best used with large electrodes on thin materials. b) It is best used with small electrodes on thin sections. c) It helps to eliminate arc blow. d) It minimizes internal undercut. c) It helps to eliminate arc blow. The resistance of steel to failure by brittle fracture is commonly assessed by conducting a: a) Rockwell C hardness test. b) Tensile test. c) Chemical analysis. d) Hydrogen embrittlement test. e) Notched bar impact test. e) Notched bar impact test. Which one of the following SMAW electrodes is restricted to horizontal and flat position welding? a) EXX18 b) E4916 c) EXX10 d) E4924 e) E4914 d) E4924 The mechanical test used to determine the ability of a material to resist failure by brittle fracture requires the use of: a) A tensile test specimen. b) A bend test specimen. c) A compression test specimen. d) An impact test specimen. e) A spectrographic test. d) An impact test specimen. Select the electrode that would be best suited for welding high sulphur steels in the flat position: a) E4924 b) E4914 c) E4927 d) E4918 d) E4918 Two steel plates are to be welded together. Each plate has a bevel cut on the face to be welded. What type of weld will be made? a) Double bevel groove weld. b) Double vee groove weld. c) Single bevel groove weld. d) Vee groove weld. e) Flare bevel groove weld. d) Vee groove weld. Which side of a fillet weld gauge is used for measuring the size of a concave faced fillet weld? a) Leg side. b) Straight side. c) Throat side. d) Face side. e) Toe side. c) Throat side. A backing gas is used to: a) Prevent root burn-through. b) Reduce root concavity. c) Support the molten root metal. d) Prevent root oxide contamination. d) Prevent root oxide contamination. A crack perpendicular to the length of the weld is called a: a) Transverse crack. b) Longitudinal crack. c) Throat crack. d) Underbead crack. a) Transverse crack. Which of the following electrodes is classified as a basic electrode: a) E-6010 b) E4914 c) All cellulosic electrodes. d) Electrodes containing titania. e) E4916 e) E4916 Constant potential power sources with the slope control are used for which type of mode of transfer? a) Globular transfer. b) Spray transfer. c) Pulsed current transfer. d) Short circuit transfer. e) Axial spray transfer. d) Short circuit transfer.