Demolition Procedures Flashcards
How are blasting machines rated?
Rated in number of caps in series the machine will reliably detonate
Where must blasting caps be temporarily stored while preparing a demolition shot?
At least 25 feet away from explosives until final priming
What is the misfire wait time for an electrical misfire?
30 Minutes
How many holes are necessary for a lacing technique?
4 holes
How many wraps are needed for a hasty whip (Minimum)?
Four
Which knots could you use to attach two pieces of det cord together?
Square knot or modified girth hitch
Which knot would you use to initiate C-4 with unsensitized det cord?
Double overhand knot or uli knot
Which knot would you use to tie two pieces of det cord together to form a longer length?
Square knot
Which knot could you use to attach det cord to dynamite?
Lace or hasty whip
True or False: An electrical firing system consists of an electric blasting cap, firing wire, galvo, and a M81 igniter?
False
What would you use a galvanometer for?
To check firing wire and electric blasting caps for continuity
True or False: A crimper should be used to cut det cord?
False (No metal on metal cutting)
What knot would you use to attach a branch line to either a ring main or a main line?
Modified girth hitch
After connecting two caps in a series circuit, what step must be done next?
Check circuit for continuity
How many twists of an electrical blasting cap leg wires will provide a proper shunt?
MINIMUM of three twists
When connecting two pieces of det cord together with tape, what is the minimum length of surface area that the det cord should contact with eachother?
18 inches
To properly electrically dual prime an explosive, the bomb tech will have to…?
Prime the explosive with two electric caps in parallel
What is the purpose of performing the close-open-close test on the firing wire after it is laid out?
To ensure that there are not shorts or breaks in the wire
When lacing explosives, what is the minimum length of the pigtails?
6 inches
