Test 4B - F/ 9 psi? 1 _/ Name: / flC/m' /:-. *3“!...

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Unformatted text preview: F/ 9 psi? 1 _/ Name: / flC/m' /:-. *3“! EftDttte: l u/ ) V . ( )3 Section / Ver 2 Read each question carefully, then print the letter offhe correct answer on the line next to the question. l . Which of the following operations can not be preformed with the workpiece between centers? Parting bi Facing- c. Knurling a. di Turninge 2. One advantage of working between centers is at that diameters can be turned concentrically b. the finish is much better c, heavier cuts are possible d. Work can be cut off at any point with a parting tool 3, a One method of accurately checking the alignment of lathe centers is by moving a dial indicator, securely mounted on a compound rest, betWeen two positions on a test bar. If the dial indicator reading on the tailstock end of the test bar shows a higher reading (plus) reading than the dial indicator reading at the headstock end, you should move the t ilstock __ 65) away from you to correct alignment 7 "b". toward you to correct alignment e. closer to the headstock to reduce offset d. away from the headstock to decrease misalignment headstock end and 2.220 at the tailstock end. To align the centers, the machinist should >< A trial cut was taken on the lathe. The reading on the work piece are 2.240” at the - adjust the tailstock: . i to inches toward the operator (1. .020 inches away from the operator ’“v 5‘ [3 , Identify the best method for aligning centers when turning \ V'lly alig e oints olthe lath ce - SW 7 ake a ma cut and measure eater en wwith a micrometer between centers: ‘9. e; se a testbmiid to dial inie I one on eac ' - d ‘d, Align the witness marks on the tailstoek 6i If you are machining work held between centers, and the lathe centers begin to squeal, ; you should first 21.x lubricate the centers 1 Ch}? stop the lathe t c. change the cutting bit ‘ (1. run the lathe at a slower speed K7 The feed rate for a finishing operation should be the feed rate for roughing. ‘ #743 0/! 8w 0‘ :$_,,, _ . ,._,‘ l, 8, ( Cg All of the following types of centers can be used in a tailstock except a (33 Soft dead center b. ball bearing center c. pipe center d. half center 9. {73“ Qxyfuel gas cutting is also known in the trade as {21.} Flame cutting v . b. Manual cutting c. Magnetic cutting d4 Electric motor cutting 10. k The included angle of a lathe dead center measures: a. 30 degrees @ 60 degrees c. 45 degrees d. 75 degrees e. 29 degrees )Q. & Which of the following devices is not used to guide a cutting machine along a line or pattern? b, A magnetic pattern '- c. A pre—drawn pattern - {d} A steel pattern \.. 7&2.\t If a positive pressure cutting torch is equipped with a cutting torch attachment, what a ditional step must be taken when shutting it down? "he acetylene valve on the cutting att - I : attachmnt must be close b c. "he acetylene valve on the cutting attachment must be closed (it "he oxygen valve on the cutting attachment must be opened (D 5 m B I: 55 CT“ w 0 - <1: 5 <12 m. shou d be set: GD Perpendicular to the lathe center axis b. On center c In a horizontal positicm d In a vertical position e a, b, and d R To a i gn lathe centers using a dial indicator and test bar, the plunger of the dial indicator xv l-l-i 9\ When cutting very thin metal, lower the torch angle to 15 7 20 deg. from horizontal to increase the thickness of the metal being cut True b. False 15. (X What are the two most commonly used fuel gasses in the industry Acetylene ans MPS b. MPS and hydrogen or Hydrogen and propane d7 Propane and natural gas 16. Q he ignition temperature of mild steel is. 1500 deg F br 2470 deg F c. 816 deg F d. 2470 deg C e. 1500 deg C 17. Which of the following is not 21 step in the preparation for oxyfuel gas cutting 9. Connect the selected cutting torch attachment to the hoses (ll?) Use the oxyfuel gas welding equipment including the regulator and the torch c. Check that all gas connections are tight and leak proof (it Select the proper size cutting tip 18. The slot that is produced during cutting is called the . a, tracer \‘9 @ kerf c. are d. head i OK As the thickness of the metal increases the cutting tip should be held closer to horizontal. a; s 20. 6 Cut quality can be affected by a. the welders skill cutting tip selected oxygen pressure used a & b only all of the above (vapor ...
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Test 4B - F/ 9 psi? 1 _/ Name: / flC/m' /:-. *3“!...

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