Questions with 100% Correct
Answers | Latest Update
Does the mixing of ammonium nitrate and fuel oil to form an explosive
require any legal approval? - 🧠 ANSWER ✔✔Yes, only if the user has
received written approval of the Chief Inspector of Explosives
"What three methods may be used to destroy AN/FO explosives?" - 🧠
ANSWER ✔✔"-By emptying the containers into a large body of stagnant
water
,-By emptying them into a pit and pouring water of them
-By scattering them on the ground and then covering them with dirt.
""How is primacord destroyed?""" - 🧠 ANSWER ✔✔The preferred method is
by burning in the same manner as dynamite. It must not be burned on the
spool, but strung out in parallel lines at least 1cm apart.
"What is primacord?" - 🧠 ANSWER ✔✔It is detonating cord consisting of
high explosive core contained in a waterproof textile covering.
"What is the proper method of attaching a blasting cap to a line of
primacord?" - 🧠 ANSWER ✔✔The cap is attached to the side of the
primacord by means of friction tape or other suitable material.
"What is a "Nonel" assembly?" - 🧠 ANSWER ✔✔A plastic shock tube
coated inside with finely powdered explosive and securely crimped to a
high strength (12 grain PETN) non-electric delay detonator.
"Can a "Nonel" cap be used to detonate all types of explosives that are cap
sensitive?" - 🧠 ANSWER ✔✔Yes, the shock tube will not disturb any
column of powder as the shock tube does not explode.
,"How would you hook up "Nonel" caps?" - 🧠 ANSWER ✔✔Hook up Nonel
to a b-line trunk line pulling excess tubing through the plastic connector,
then attach a cap to b-line trunk line and blast.
"Would you trim off excess Nonel tubing?" - 🧠 ANSWER ✔✔No, each
Nonel is a sealed unit. One end of the tube is sealed by means of heat
seals, the other end by the detonator. If excess tubing is cut off moisture
may enter and cause malfunction.
"Can Nonels be used in areas of possible stray current?" - 🧠 ANSWER
✔✔Yes, Nonels are not a conductor of electricity.
"What is the recommended exposure time for a Nonel detonator assembly
in n explosive that uses fuel oil as a component?" - 🧠 ANSWER ✔✔6 days
(15 days for Nonel XT)
"How should a blasting cap be attached to a detonator cord such as
primacord?" - 🧠 ANSWER ✔✔It should be taped into position and the end
of the cap must be positioned with the base of the cap pointing in the
direction of initiation.
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, "How should a blasting cap be attached to a procore primer or other high
strength cast primer?" - 🧠 ANSWER ✔✔The end of the cap should be
positioned within the primer, pointed in the direction of the main charge.
"What is the detonation velocity of detonating cord?" - 🧠 ANSWER
✔✔~22,000f/s or 6,075m/s
"Can detonating cord be lit with a match?" - 🧠 ANSWER ✔✔Detonating
cord cannot be lit with a match.
"What is the chemical composition of the explosive used in detonating
cord?" - 🧠 ANSWER ✔✔Pentaerythritol tetranitrate.
"How is the explosive strength of detonating cord usually expressed?" - 🧠
ANSWER ✔✔In grams of PETN per meter of foot of cord.
"What is a detonating connector relay?" - 🧠 ANSWER ✔✔A detonating
connector relay is a nonelectric device which provides a short interval delay
in a detonation cord circuit. It is also known as a delay connector, MS
connector, or a relay.
"How is a pigtail detonating connector attached to detonating cord?" - 🧠
ANSWER ✔✔By a square knot or by taping together, with 4 overlap."