13-14. Which of the following rotary machine–rolling operations is generally the most difficult to perform? 1. Wiring 2. Beading 3. Burring 4. Crimping 13-15. When using flush-head rivets, you are required to have what minimum edge distance? 1. 1 1/2 times the rivet length 2. 2 1/2 times the rivet length 3. 1 1/2 times the rivet diameter 4. 2 1/2 times the rivet diameter IN ANSWERING QUESTION 13-16, REFER TO TABLE 13-2 IN THE TEXTBOOK. 13-16. To properly drill a hole for a 1/8-inch rivet, you should use what number drill bit? 13-17. You are using a CP350 blind rivet pull tool and want to change the rivets from universal heads to countersunk heads without changing the rivet diameter. Which of the following blind rivet pull tool components will you need to change? 1. The chuck jaws 2. The outer anvil 3. The inner anvil 4. The inner anvil thrust bearing 13-18. The installation, inspection, and removal procedures for cherrylock rivets are basically the same for which of the following types of rivets? 1. Huck 2. Flush 3. Solid 4. Hi-shear IN ANSWERING QUESTIONS 13-19 THROUGH 13-21, SELECT FROM COLUMN B THE TYPE OF DAMAGE THAT BEST DESCRIBES THE CAUSE LISTED IN COLUMN A. NOT ALL ITEMS LISTED IN COLUMN B WILL BE USED. A. CAUSE B. DAMAGE 13-19. Hard landings or 1. Combat violent maneuvers 2. Stress 13-20. Small cracks resulting from 3. Fatigue vibration 4. Foreign 13-21. Tools or hardware left adrift around turning engines 13-22. You are investigating the damage to an aircraft caused by a fire. To determine if the aircraft’s metal has lost any of its strength characteristics, you should use which of the following inspection methods? NDI Hardness testing Visual inspection Inspection for cracks IN ANSWERING QUESTIONS 13-23 THROUGH 13-25, SELECT FROM COLUMN B THE DAMAGE CLASSIFICATION THAT BEST MATCHES THE REPAIR LISTED IN COLUMN A. NOT ALL ITEMS LISTED IN COLUMN B WILL BE USED. 13-23. 13-24. 13-25. A. REPAIR Splice a new section in the damaged area Remove a small dent from the damaged area Install new metal to reinforce the damaged area B. DAMAGE 1. Negligible damage 2. Damage requiring replacement 3. Damage repairable by patching 4. Damage repairable by insertion 68