Colorado State Blasters Exam Questions
& Answers Graded 100%
Deck - ANSWER -An explosive charge that is separated from the other charges in
the blast hole by stemming or air cushion
Deflagration - ANSWER -An explosive reaction such as a rapid combustion that
moves through an explosive material at a velocity less than the speed of sound in
the material.
Detonating Cord - ANSWER -A cordlike explosive containing a core of high-
explosive material, usually PETN; also called primacord.
Detonation - ANSWER -An EXPLOSION, a chemical reaction/burn that
SURPASSES THE SPEED OF SOUND, creating the detonation velocity which
ruptures the outer container of the explosive, if any.
Detonator - ANSWER -Any device containing initiating or primary explosive that
is used for initiating detonation. Commonly blasting caps and other replacements
for electric leg wires
Down Line - ANSWER -A line of detonating cord or plastic tubing in a blast
whole which transmits detonation from the trunk line to the primer
Electric Detonator - ANSWER -A detonator designed for, and capable of,
initiation by means of an electric current.
Electronic Detonator - ANSWER -A detonator that utilizes stored electrical
energy as a means of powering a electric timing delay to provide initiation energy
for firing the base charge
Emulsion - ANSWER -An explosive material containing substantial amounts of
oxidizers dissolved in water droplets surrounded by an immiscible fluid
, Explosive Oil - ANSWER -Liquid explosive sensitizers for explosive materials
(e.g. nitroglycerin, ethylene glycol dinitrate etc.)
Extraneous electricity - ANSWER -Electrical energy other than the required firing
current that is present at a blast site and that could enter a blasting circuit.
Firing Line - ANSWER -The wire(s) connecting the electrical power source with
the electric or electronic blasting circuit
Fly Rock - ANSWER -Rocks propelled from the blast area by the force of an
explosion.
Free Face - ANSWER -A rock surface exposed to air or water which provides
room for expansion upon fragmentation
Safety Fuse - ANSWER -A flexible cord containing an internal burning medium
by which fire or flame is conveyed at a continuous and uniform rate from the point
of ignition.
Blasting Cap - ANSWER -A detonator which is initiated by a safety fuse
Fuse Lighter - ANSWER -Pyrotechnic devices for the rapid and certain lighting
of a safety fuse
Loading Density - ANSWER -The weight of explosive per distance of borehole
High Explosives - ANSWER -Explosives which are characterized by a very high
rate of reaction and formation of a detonation wave
Low Explosives - ANSWER -Explosives which are characterized by deflagration
or a low rate of reaction
& Answers Graded 100%
Deck - ANSWER -An explosive charge that is separated from the other charges in
the blast hole by stemming or air cushion
Deflagration - ANSWER -An explosive reaction such as a rapid combustion that
moves through an explosive material at a velocity less than the speed of sound in
the material.
Detonating Cord - ANSWER -A cordlike explosive containing a core of high-
explosive material, usually PETN; also called primacord.
Detonation - ANSWER -An EXPLOSION, a chemical reaction/burn that
SURPASSES THE SPEED OF SOUND, creating the detonation velocity which
ruptures the outer container of the explosive, if any.
Detonator - ANSWER -Any device containing initiating or primary explosive that
is used for initiating detonation. Commonly blasting caps and other replacements
for electric leg wires
Down Line - ANSWER -A line of detonating cord or plastic tubing in a blast
whole which transmits detonation from the trunk line to the primer
Electric Detonator - ANSWER -A detonator designed for, and capable of,
initiation by means of an electric current.
Electronic Detonator - ANSWER -A detonator that utilizes stored electrical
energy as a means of powering a electric timing delay to provide initiation energy
for firing the base charge
Emulsion - ANSWER -An explosive material containing substantial amounts of
oxidizers dissolved in water droplets surrounded by an immiscible fluid
, Explosive Oil - ANSWER -Liquid explosive sensitizers for explosive materials
(e.g. nitroglycerin, ethylene glycol dinitrate etc.)
Extraneous electricity - ANSWER -Electrical energy other than the required firing
current that is present at a blast site and that could enter a blasting circuit.
Firing Line - ANSWER -The wire(s) connecting the electrical power source with
the electric or electronic blasting circuit
Fly Rock - ANSWER -Rocks propelled from the blast area by the force of an
explosion.
Free Face - ANSWER -A rock surface exposed to air or water which provides
room for expansion upon fragmentation
Safety Fuse - ANSWER -A flexible cord containing an internal burning medium
by which fire or flame is conveyed at a continuous and uniform rate from the point
of ignition.
Blasting Cap - ANSWER -A detonator which is initiated by a safety fuse
Fuse Lighter - ANSWER -Pyrotechnic devices for the rapid and certain lighting
of a safety fuse
Loading Density - ANSWER -The weight of explosive per distance of borehole
High Explosives - ANSWER -Explosives which are characterized by a very high
rate of reaction and formation of a detonation wave
Low Explosives - ANSWER -Explosives which are characterized by deflagration
or a low rate of reaction
