Initiating sets, Firing systems, and Priming methods

Question 1

what does a non electric initiating set consist of

Answer 1

M60/M81 initiator- source of ignition

M700 time fuse- time blasting fuse

M7 non electric blasting cap

Question 2

how do you determine time fuze length

Answer 2

conduct 3’ test burn to determine ABR

convert desired burn time to seconds

divide DBT by ABR

multiply the two decimals by 12 to get inches

multiply the two decimals by 16 to 16 of inch

if your ABR is less than 35 seconds or more than 45 seconds start over, if second ABR is within 2 seconds of first then keep and use M700, if not get a new roll

Question 3

what does an electric initiating set consist of

Answer 3

power source- CD450

firing wire

electric blasting cap- M6

Question 4

what must you do when checking continuity on M6

Answer 4

always ground yourself before unshunting wire

M6 should be under a sandbag or demo bag w/o demo in it

Question 5

with a misfire on an electrical initiating set how do you clear misfire

Answer 5

use a new power source, clear misfire WITH power source

misfires may be investigated immediately