API-577

When performing a carbon steel to carbon steel hot tap where the CE of one of the metals is greater than 0.42%, which of the following electrodes should be used?A . E7048-H4B . E7048C . E7018-A1D . E7018View AnswerAnswer: D

What is(are) the most appropriate action(s) to prepare an in-service carbon steel piping system that has been in caustic service for welding?A . Neutralize and clean the surface within 6 in. (150 mm) of weld bevelsB . Steam out the piping system and dryC . Verify with pH paper that...

Which of the following is a hazard associated with in-service welding on a carbon steel pipe containing chlorine?A . Explosion or unstable reaction with the addition of localized heat.B . Exothermic decomposition or explosion.C . Carbon steel will burn in the presence of chlorine and high heat.D . Hydrogen released...

Which of the following is a practical solution to eliminate or reduce porosity when welding carbon steel?A . Reduce travel speedB . Proper shieldingC . Lower heat inputD . Arc length controlView AnswerAnswer: B

What is the "area of interest" on a weld radiograph?A . The entire radiograph minus 2 in. (50.8 mm) from the edgesB . Only the area of contrasting densityC . The specific portion of a radiograph that needs to be evaluatedD . The portion that is less than 3t from...

What is the liquid flow rate range that should be maintained in piping to be hot tapped?A . 0.05 - 2.7 ft./sec (0.015 - 0.82 m/sec)B . 1.3 - 4.0 ft./sec (0.40 - 1.20 m/sec)C . 2.3 - 3.3 ft./sec (0.70 - 1.00 m/sec)D . 4.1 - 5.5 ft./sec (1.25...

What is the minimum liquid level that should be maintained above the area that is to be hot tapped on a storage tank or vessel?A . 1 ft. (300 mm)B . 2 ft. (600 mm)C . 3 ft. (900 mm)D . 4 ft. (1200 mm)View AnswerAnswer: B

For SMAW welding, the last number of the electrode identification identifies:A . Chemical composition.B . Electrode operating characteristics.C . Welding position.D . Coating operating characteristics.View AnswerAnswer: D

For what maximum outside diameter may a radiographic technique be used in which the radiation passes through two walls and the weld in both walls is viewed for acceptance?A . 1.5 in. (38.0 mm)B . 2.5 in. (63.5 mm)C . 3 in. (76.2 mm)D . 3.5 in. (90.0 mm)View AnswerAnswer:...

Which of the following is a commonly accepted advantage of flux core arc welding (FCAW)?A . Equipment is simple, inexpensive, and portable.B . The slag supports and shapes the weld bead.C . There is a reduced requirement for ventilation.D . There is minimal postweld cleanup.View AnswerAnswer: B