467 PENNSYLVANIA PHILADELPHIA
DEMOLITION CLASS A 2026 COMPLETE EXAM
PREPARATION WITH VERIFIED QUESTIONS AND
ANSWERS
◉ Low Velocity Explosive. Answer: Explosives that change from a
solid to a gaseous state over a sustained period up to 400 m/sec.
This type of explosive is ideal for pushing
◉ High Velocity Explosive. Answer: Explosives that change to a
gaseous state almost instantaneously @ 1000 m/sec. This type of
explosive produces a shattering / cutting effect.
◉ Relative Effectiveness (RE) Factor. Answer: The shattering effect
of explosive in relation to that of TNT
◉ Military Explosives Block in form. Answer: -C4 (M112)
-TNT (1lb., 1/2lb.)
◉ Military Explosives Cylindrical in form. Answer: -M1 Dynamite
-TNT (1/4lb.)
-H6 Cratering Charges
,-Shaped Charge (15lb., 40lb.)
-Bangalore Torpedo (M1A2, M1A3)
◉ All Demolition Charges are considered to be _____________ but hold
different forms. Answer: Block Charges
◉ Basic Demolitions System. Answer: Initiation System > Firing
System > Priming Charge > Main Charge
◉ Initiation System. Answer: Ignites the firing system to create a
pressure wave
◉ Firing System. Answer: Carries the pressure wave from the
initiation system to the priming charge.
◉ Priming Charge. Answer: Explodes to blow main charge.
◉ Main Charge. Answer: Explodes to create the desired effect.
◉ Transmission Line. Answer: Carry charge from igniter to to
priming charge or main charge
◉ Line Main. Answer: A main line that is made of detonating cord
, In line shape
◉ Ring Main. Answer: A main line that is made of detonating cord
In a ring shape
◉ Priming Charges. Answer: Priming a charge is simply positioning
a suitable primer within a charge or column of explosives. The object
is to provide the primary-initiating explosion needed to detonate the
main charge efficiently.
A primer is a much more sensitive explosive that is used to detonate
the larger, but less sensitive explosives
Det Cord, MDI, Time Delayed
◉ Branch Line. Answer: Connects to the main line and branches off
to create initiation system (primer) for charges
◉ Time Fuse. Answer: Sends an initiating flame, but in a controlled
delay (time)
DEMOLITION CLASS A 2026 COMPLETE EXAM
PREPARATION WITH VERIFIED QUESTIONS AND
ANSWERS
◉ Low Velocity Explosive. Answer: Explosives that change from a
solid to a gaseous state over a sustained period up to 400 m/sec.
This type of explosive is ideal for pushing
◉ High Velocity Explosive. Answer: Explosives that change to a
gaseous state almost instantaneously @ 1000 m/sec. This type of
explosive produces a shattering / cutting effect.
◉ Relative Effectiveness (RE) Factor. Answer: The shattering effect
of explosive in relation to that of TNT
◉ Military Explosives Block in form. Answer: -C4 (M112)
-TNT (1lb., 1/2lb.)
◉ Military Explosives Cylindrical in form. Answer: -M1 Dynamite
-TNT (1/4lb.)
-H6 Cratering Charges
,-Shaped Charge (15lb., 40lb.)
-Bangalore Torpedo (M1A2, M1A3)
◉ All Demolition Charges are considered to be _____________ but hold
different forms. Answer: Block Charges
◉ Basic Demolitions System. Answer: Initiation System > Firing
System > Priming Charge > Main Charge
◉ Initiation System. Answer: Ignites the firing system to create a
pressure wave
◉ Firing System. Answer: Carries the pressure wave from the
initiation system to the priming charge.
◉ Priming Charge. Answer: Explodes to blow main charge.
◉ Main Charge. Answer: Explodes to create the desired effect.
◉ Transmission Line. Answer: Carry charge from igniter to to
priming charge or main charge
◉ Line Main. Answer: A main line that is made of detonating cord
, In line shape
◉ Ring Main. Answer: A main line that is made of detonating cord
In a ring shape
◉ Priming Charges. Answer: Priming a charge is simply positioning
a suitable primer within a charge or column of explosives. The object
is to provide the primary-initiating explosion needed to detonate the
main charge efficiently.
A primer is a much more sensitive explosive that is used to detonate
the larger, but less sensitive explosives
Det Cord, MDI, Time Delayed
◉ Branch Line. Answer: Connects to the main line and branches off
to create initiation system (primer) for charges
◉ Time Fuse. Answer: Sends an initiating flame, but in a controlled
delay (time)
