ABT52 (2020) FINAL HW (5 Pages, 2 Sided) STUDENT’S NAME: Paul Carey DUE DATE: 3/20/2020 (Final Exam Day) PART A: TRUE OR FALSE? DRAW A CIRCLE AROUND THE CORRESPONDING ONE. T F 1- In braze welding the parts do not fuse together. T F 2- Soldering needs more heat than brazing. T F 3- In MIG welding, the current type is DCEN. T F 4- In TIG welding the current is DCEN T F 5- In MIG welding a constant voltage (CV) power supply is used. T F 6- In TIG welding a constant current (CC) power supply is used. T F 7- MIG welding is not a semiautomatic welding process. T F 8- Shielding gas is never used in Flux-cored arc welding. T F 9- MIG welding is also used for aluminum and stainless steel welding. T F 10- A common fluid is used for both drilling and tapping. T F 11- Tapered taps are the same as machine taps. T F 12- Drilling speed reduces with increase in metal thickness. T F 13- Drilling speed increases as the drill size decreases. T F 14- TIG welding is an arc welding process. T F 15- Plasma is not conductive. T F 16- Plasma cutter could be used for non ferrous materials. T F 17- Water jet cutting is only used for ferrous materials. T F 18- The “initialize” command in plasma cam sets all of the variable factors on the preset value. T F 19- The E6011 type of electrode is used for root welding. T F 20- The E6011 type of electrode is preferred for vertical welding. T F 21- Metalworking and fabrication are two independent processes. T F 22- A counter bore could also be used for deburring the drilled holes. T F 23- Layout is part of the fabrication process. T F 24- Center punch and transfer punch have different applications. T F 25- Step drills are only recommended for sheet metal. T F 26- Hard facing is only an arc welding process. T F 27- In stick welding we cannot control the output voltage T F 28- For more penetration of the weld we replace E6011 electrode with E6013. T F 29- E 70T-6 is a regular MIG welding wire T F 30- DCEP also means direct current reverse polarity
1 SEE THE BACK SIDE PART B: ANSWER EACH SECTION (a, b, c …) OF EACH QUESTION, SEPARATELY 1. What are the SPECIFIC APPLICATIONS of the following tools? a) Tapered Drill Bits: Taper Point Drills were engineered to be used to pre drill the pilot holes for the shank and threaded portion of a wood screw. The object, of course, is to use the proper size drills and drill to the proper depth to insure the best holding power from the wood screw. b) Machine Taps: can be be used to start the thread in a blind hole for another tap to finish or used to cut threads all the way on a through hole. c) Starter Taps: to finish or used to cut threads all the way on a through hole d) Tapping Block- to keep materials level and flush with what needs to be worked on e) Dies used to weld similar or dissimilar materials together to create the function of a product.
- Fall '08
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