Question 1: What is the primary reason we pre-heat the tool joint before welding? a. To burn off any contamination on the surface of the tool joint b. To ensure the weld pool stays liquid for longer c. To aid in slow cooling d. To reduce spatter

Question 2: What is the preheat temperature range of a 6 5/8" O.D. Tool Joint? a. 300-400F / 149-204C b. 500-600F / 260-316C c. 600-650F / 316-343C d. 550-600F / 288-316C

Question 3: What's the best way to ensure you have a soak heat (pre-heat through the wall thickness of the tool joint)? a. Remove from heat, measure the temperature, leave in still air for 4 minutes, measure again. b. Apply temperature sticks on both OD and ID simultaneously c. Run heated water through the drill pipe while heat is applied d. Heat at least 4" either side of the weld area

Question 4: What is the maximum interpass temperature for a standard drill pipe tool joint? a. 800F / 426C b. 850F | 454C c. 900F / 482C d. 950F / 510C

Question 5: Where do you check interpass temperature? a. In the middle of the first hardband b. In the gap between the first and second hardband c. At the toe of the final band applied d. 1" from the final band applied

Question 6: Why do we slow-cool after welding?' a. To ensure the Heat Affected Zone (HAZ) does not become hard and brittle b. To ensure there is no hydrogen entrapment in the weld c. To give the weld and the base material time to bond d. To discourage stress cracking

Question 7: What is the maximum acceptable cooling rate per hour? a. 125F / 52C b. 50F / 10C c. 75F / 24C d. 150F / 65C

Question 8: What is the maximum temperature allowed when slow cooling protection can be removed? a. 400F / 204C b. 200F / 93C c. 100F / 38C d. 300F / 149C

Question 9: What is the appropriate range for the angle of the welding torch in degrees? a. 3-7 degrees b. 7-12 degrees c. 10-17 degrees d. 16-25 degrees

Question 10: Duraband can be utilized in which welder polarity setups? a. Electrode Positive b. Electrode Negative c. Neither Setting d. Both Electrode Negative and Electrode Positive

Question 11: What is the typical minimum voltage needed to achieve a spray arc with Duraband NC a. 21v b. 21v c. 27v d. 30v

Question 12: What is the recommended rotational speed for a typical hardband deposit? a. 4 seconds per inch of diameter b. 7 seconds per inch of circumference c. 12 seconds per inch of circumference d. 15 seconds per inch of diameter

Question 13: Where on the tool joint would you typically start the first hardband? a. On the straight edge of the 18-degree taper b. At the end of the threads c. Minimum 3" from the 18-degree taper d. Minimum 3/8" from the 18-degree taper

Question 14: With dilution, on first application, what % of the hardband is typically Duraband/Base Material a. 85% DB / 15% Base b. 70% DB / 30% Base c. 60% DB / 40% Base d. 40% DB / 60% Base

Question 15: What is the only type of cracking that is acceptable with a reapplication of Duraband over itself? a. Circumferential cracks no more than 1/18" in length b. Longitudinal cracks no more than 1/8" in length and less then 4 per band c. Surface cracking that does not propagate into the base material d. No cracks are allowed

Question 16: Which of these can cause porosity in the weld? a. Lack of shielding gas cover b. Oil or dirt on the tool joint c. Improper welding parameters d. All of the above

Question 17: Which one of the following statements is true? a. Voids in the weld are cause for rejection and the hardband must be completely removed b. Voids smaller than 1/8" in diameter are deemed acceptable c. Voids greater than 1/16" in diameter are unacceptable, but can be repaired with spot welding if pre-heat and slow cool procedures are followed d. Voids between bands are expected and acceptable

Question 18: How should the geometry of the hardband appear? a. Flat or slightly convex, with 1/16" gap between bands b. Flat or slightly concave, with less than 1/16" deep depressions between bands c. Flat or slightly concave, with 1/16" gap between bands d. Flat or slightly convex, with less than 1/16" deep depressions between bands

Question 19: Industry casing wear testing has shown which of the following to be true? a. Tungsten carbide hardbanding is so abrasive it will wear a hole in the casing after 15 minutes of an 8 hour test b. Duraband NC will actually reduce wear on the casing by around 50% compared to a bare tool joint c. Oil-based/synthetic mud will reduce wear on hardband and casing compared to water based mud d. All of the above

Question 20: A welder certification for the application of Duraband is valid for how long? a. 1 Year b. 3 Years c. 90 days d. Lifetime