Machinist Quiz A quiz to assess a prospective CNC machinist’s knowledge and skill. Machinist Quiz Please fill out your name.* Please use the same first and last name on your job application. * Please fill out your name.* Please use the same first and last name on your job application. First First Last Last Please provide your email.* This should be the same email address you used for your job application. * 1. You determine that a Feed rate for a particular tool must be 5.0 inches per minute (or 5 millimeters per minute in the metric mode). The correct designation in the program would be:* * F0.5 S5.0 F5.0 F0.005 2. You are running a proven program (one run before) for the first time in a new setup. You are cautiously allowing the first tool to come into its approach position when you determine that the tool is not going where it is supposed to. The most likely reason is:* * The spindle speed is not correct The dry run switch should be turned on The programmed coordinates are not correct The program zero designation is not correct 3. What mode switch position allows programs to be modified?* * Jog Auto MDI (manual data input) Edit Zero Return 4. What mode switch position allows a program to be run from within the CNC control?* * Jog Auto MDI (manual data input) Edit Zero Return 5. What mode switch position lets you move the machine axes manually?* * Jog Auto MDI (manual data input) Edit Zero Return 6. Which on/off switch works in conjunction with an M01 in the program?* * Dry Run Optional Stop Optional Block Skip / Block Delete Single Block Machine Lock 7. The Feed rate Override switch lets the operator control the machine’s movement rate during cutting commands* * True False 8. The button used to temporarily stop the CNC cycle is:* * Reset Emergency Stop Coolant On Cycle Start Feed Hold 9. The button that will reactivate the CNC program after temporary stoppage is:* * Reset Emergency Stop Coolant Stop Coolant On Cycle Start Feed Hold 10. The display screen mode that lets the operator actually see the CNC program is the:* * Offset page Position page Alarm page Program page Program check page 23. You are running the first workpiece with a proven program. Tool number five is a milling cutter machining a pocket to a very tight depth tolerance. You should:* * Simply run the milling cutter. If the tool length compensation value, the program Z coordinates, and the program zero assignment in Z are correct, the pocket will come out right to size. Increase the tool length compensation value for tool five by a small amount. This will force excess stock to be left in the pocket. After machining, check the pocket depth and adjust the tool length compensation offset value accordingly and return the tool. 11. The display screen mode that lets the operator enter tooling related data is the:* * Offset page Position page Alarm page Program page Program check page 12. As part of the machine start up procedure, you must send the machine to its zero return (home) position:* * True False 13. There is always some way to adjust offsets to ensure that every tool in every program will machine with a little excess stock. Meaning (if the program is correct) there is never an excuse to scrap the first workpiece in a production run.* * True Fales 14. While there is never a good excuse for a crash, if you do have a mishap and your machine crashes, you should:* * Check visually to see that there is no damage and continue running production Immediately notify your supervisor Fix any damage and continue running production Stop running production for the balance of your shift 15. As you are verifying a new program that has never run before, you find what you consider to be a serious mistake in the program’s motions. You should:* * Do your best to fix the mistake and continue Notify your supervisor so the programmer can be contacted Assume that the program has been well checked by the programmer and run the program as it is 16. A program stop is encountered and the machine stops. However, you are not sure why the program stop is in the program. You should:* * Press cycle start to resume the programs execution Call up the program display screen mode and see if there is a message telling you what to do Turn on single block to cautiously step through the next few commands 17. Spindle speed for machining centers is always specified in:* * Surface feet or meters per minute RPM Inches per minute Inches per revolution 18. When viewing a vertical machining center from the front, the X Axis is forward/back, Y is left/right, and Z is up/down.* * True Fales 19. You need to manually make a tool change to place tool number one in the spindle. However, the machine has no manual buttons or switches for making tool changes. You must:* * Contact the machine tool builder to fix the machine Write a short program to make the tool change Use the MDI mode to command the tool change using program-like commands You cannot manually activate the tool changer with this machine 20. You are running the first workpiece with a proven program (one that has run before). The first four tools cut just fine. However, the fifth tool (an end mill machining a pocket) does not cut quite deep enough. It is most likely that:* * The program zero assignment is incorrect The tool length compensation offset for tool five is not correct The cutter radius compensation offset for tool five is not correct The program coordinates for tool five are incorrect 21. You are verifying a new program, cautiously allowing each tool to approach the workpiece using single block and dry run. Tools one and two run just fine. However, as tool three gets within about one inch of the work surface, you are worried that it may not stop in its correct position, so you press feed hold and check the DISTANCE-TO-GO page on the display screen. Sure enough, the distance to go reads a value of Z-3.5435 inches. It is likely that:* * Tool length compensation is not instated for this tool choice The tool length compensation offset value is incorrect The programmed Z approach coordinate for tool three is incorrect Any of the above 22. You are running the first workpiece with a proven program (one that has run before.) Tool number four is a milling cutter that machines a pocket. The pocket is supposed to be 0.5000 in +-0.001 deep. However, after tool four mills the pocket, you find the pocket to be 0.4970 deep. You must:* * Change the program to make the end mill plunge 0.003 in deeper Increase the tool length compensation value by 0.003 in Decrease the tool length compensation value by 0.003 in Increase the program zero designation Z value by 0.003 in Submit If you are human, leave this field blank.