Demolition Exam Questions And Answers With Rationales (Verified Answers) |Already Graded A+

Demolition Exam Questions And Answers With Rationales (Verified Answers) |Already Graded A+ What are the two types of transmission lines used in demolition? - CORRECT ANSWER- line main- single line of det cord ring main- det cord looped back into a ring Internal priming for det cord - ANSWER- Uli knot Quad knot Whipping Methods for minimum of 8 turns ? - ANSWER- - 1.25 lbs of explosives 8 turns - 1.25 lbs of explosives 7 wraps on top of 9 wraps ( 16 total) What is sensitized set cord? - ANSWER- has non electric blasting cap crimped on the end and is used to direct prime explosives What is a galvanometer and what type of battery does it use? - ANSWER- - used to test continuity in firing cable and blasting caps -silver chloride dry cell batteries MK 6 MK 17 MOD 0 electric blasting caps (resistance and amperage)? - CORRECT ANSWER- -waterproof and can be used in underwater demolition -each cap has the resistance of 2.0 ohms -amperage to fire in series is 1.5 amps Parallel circuit amperage requirement per cap? - ANSWER- -will still detonate even if one of the caps were bad -0.6 amps per cap What is the splicing method to connect two or more caps in the same circuit? - ANSWER- western union splice (3 left, 3 right, hook splice excess_ Splicing method to connect lead wires to single strand firing wire? - CORRECT ANSWER- hook splice ( wrap lead then bend down fire wire) Splicing method to connect lead wires to multiple strand firing wire? - CORRECT ANSWER- Eye Splice Blasting machines - ANSWER- -MK1 MOD 1- squeeze the handle rapidly to charge -CD 450-4J - depress charge button, once light turns on press fire button M2 blasting cap crimper? - ANSWER- has a stop for preventing overcrimping of the cap Fuse igniter misfire procedures - ANSWER- Wait 60 minutes insert new fused blasting cap ignite new fuse NONEL components - ANSWER- - Initiator: MK 54 (single firing device) MK 55 (dual firing device) - Pyrotechnic: MK 23 MK 24 (WP to 200 fsw) - Shocktube - Factory crimped blasting caps - det cord or booster - Base charge Modern Demolition Initiator (MDI) Parts? - ANSWER- Priming system - Caps Transmission line - Shocktube Initiating system - M81 benefits of MDI? - ANSWER- cuts emplacement times by %50 improved reliability eliminates accidental initiations Depth limitation of MDI? - ANSWER- 70 fsw Function of M9 blasting cap and shock tube holder? - ANSWER- connects up to five shock tube components or lo strength det cord component to a high strength cap or booster MDI misfire procedure - ANSWER- Recock M81 and attempt to fire replace M81 if it fails second attempt allow a minimum of 30 min to ellipse before investigating downrange, plus the burn time of the secondary M14 and M18 Strain Relief of Det Cord - ANSWER- Every 3feet, 2-3" of catinary when do you have to double strand Det cord for undets? - ANSWER- deeper than 33' Wait time for UNDETs - ANSWER- 5 mins multiple undets should be less than 10s or more than 30 min apart Max NEW for 3rd fleet op area - ANSWER- 29# - SSTC Oceanside SWAG - SSTC Bayside 20# - all other socal and Hawaii ranges 500# - NW harbor 2.5# - NW Training complex Where is the demo pickup area for helicopters on North Island - ANSWER- Red Label Area Time to observe for mammals on SSTC Oceanside and exclusion zones - CORRECT ANSWER- 0-24fsw - 10mins /340m 25-72fsw - 30mins / 640m What distance should structures/roads be from burn sites (less than 450#) - CORRECT ANSWER- essential personnel k-24 or 1250' structures k40 How close can materials for same day disposal be stockpiled to an active burn pad - ANSWER- 500' minimum, ensure no possibility of frag from burnsite RCRA - ANSWER- Resource Conservation Recovery Act For Frag producing, how deep must the shot hole/barricade be? - CORRECT ANSWER- 4' minimum When do you give hazard control brief and operational brief? - ANSWER- Prior to being assigned as workers HAZ- annually it when hazards change OP - 30 days or hazard/mission change OIS NOSSA - ANSWER- Ordnance Information System