Demolition Procedures-Electric Flashcards
What 3 components make up an electric firing system
electric initiator, fire wire, blasting machine
When unraveling wires from a blasting cap what should you consider doing
using a stress relief to keep from pulling the wires from the cap
What electric blasting cap is used by the military
m6 blasting cap
What civilian blasting cap is equivalent to the m6 military cap
civilian #8 cap
Should you mix blasting cap sizes or manufacturers
no blasting caps must be of the same size and manufacturer
What resistance must your fire wire possess
4.3 Ohms per 1000ft of wire, fire wire is rated at ohms per linear ft, most spool come in 500ft lengths
When using electric blasting caps is it okay to check continuity with a multi meter
no! there is there is enough electricity in a multi meter to fire a cap
When using a digital galvanometer 0 means
you have continuity, a 1 reading means no continuity
How are blasting machines rated
By the number of caps in series that it can reliably detonate
How is the Galvanometer used during electric demolition operations
To check continuity in both electric caps and the firing wire
What is the wait time for an electrical misfire
30 minutes
What is the main advantage of electrical donation procedures
Maintaining positive control over detonation
What are the three steps to conduct for electrical donation procedures
Step one conduct continuity check of firing wire
Step two unwind cap wires and test blasting caps
Step three follow electrical procedures for building a circuit
Where must blast in caps be temporary stored while preparing a demolition shot
At least 25 feet away from explosives until final priming
