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AMMO 63 U.S. ARMY EXPLOSIVES SAFETY FAMILIARIZATION
(AMMO-63-DL) — COMPREHENSIVE EXAM QUESTION BANK V2.0
Defense Ammunition Center | U.S. Army Explosives Safety
Certification | 2026 Updated Standards
TABLE OF CONTENTS
Section Topic Area Questions
I Hazard Classification, Divisions & Explosive Types 1–20
II Ammunition Identification, Marking & Documentation 21–30
III Magazine Storage Operations & Safety Protocols 31–45
IV Quantity-Distance (QD) Principles & Calculations 46–65
V Transportation Safety & Hazardous Materials Shipping 66–80
VI Net Explosive Weight (NEW) & Complex Calculations 81–95
VII Electromagnetic Radiation (EMR), EEDs & Lightning Protection 96–110
VIII Standard Operating Procedures (SOPs) & Risk Management 111–125
Regulatory Framework, References & Certification
IX 126–140
Requirements
X Scenario-Based Applied Safety Situations 141–150
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SECTION I: HAZARD CLASSIFICATION, DIVISIONS & EXPLOSIVE TYPES
1. Which of the following statements accurately distinguishes between HD 1.1 and HD 1.2
explosives regarding their blast and fragmentation effects?
• A) HD 1.1 produces primarily fragmentation with minimal blast overpressure, while HD
1.2 produces primarily blast effects
• B) HD 1.1 produces a mass explosion with both blast and high-velocity fragmentation
affecting the entire load, while HD 1.2 produces primarily fragment-producing hazards
without mass detonation
• C) HD 1.1 and HD 1.2 both produce mass explosions, but HD 1.2 has a smaller radius of
effect
• D) HD 1.1 produces only thermal effects, while HD 1.2 produces blast effects
CorreCt Answer: B — HD 1.1 is characterized by a mass explosion hazard affecting
the entire load virtually instantaneously with both blast and fragmentation. HD 1.2 presents a
projection/fragment-producing hazard without mass detonation. This fundamental distinction
drives storage and quantity-distance requirements.
2. A pyrotechnic flare produces illumination through a chemical reaction that propagates
at subsonic speeds. This reaction is properly classified as:
• A) Detonation
• B) Deflagration
• C) Sublimation
• D) Combustion without gas production
CorreCt Answer: B — Pyrotechnics deflagrate (burn at subsonic speeds) rather than
detonate. Deflagration is a subsonic combustion reaction that propagates through the material
at speeds below the speed of sound, distinguishing it from detonation which is supersonic.
3. An explosive train sequence for a typical projectile consists of which of the following
components in the correct order?
• A) Primer → Main charge → Booster → Detonator
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• B) Primer → Booster → Main charge
• C) Detonator → Primer → Booster → Main charge
• D) Main charge → Booster → Primer
CorreCt Answer: B — The explosive train progresses from primer (most sensitive) to
booster to main charge. This ensures reliable initiation while maintaining handling safety. The
primer initiates the booster, which provides sufficient energy to detonate the relatively
insensitive main charge.
4. Which hazard division is characterized by a mass fire hazard with minor blast or
fragment effects?
• A) HD 1.1
• B) HD 1.2
• C) HD 1.3
• D) HD 1.4
CorreCt Answer: C — HD 1.3 presents a mass fire hazard with minor blast or
fragment effects. These materials burn vigorously and may produce some blast or
fragmentation, but the primary hazard is thermal (fire) rather than explosion. Pyrotechnic items
and some propellants commonly fall into this division.
5. An item classified as HD 1.4 presents which of the following hazard profiles?
• A) Mass explosion hazard with severe structural damage
• B) Projection hazard with significant fragmentation
• C) Mass fire hazard with minor blast
• D) Moderate fire hazard with no significant blast or fragment effects, confined to the
package
CorreCt Answer: D — HD 1.4 presents a moderate fire hazard with no significant
blast or fragment effects, with any effects typically confined to the package. This makes HD 1.4
materials the least hazardous in the Class 1 division system for storage and transportation.
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6. The term "mass explosion" in the context of HD 1.1 means:
• A) A series of explosions occurring sequentially over time
• B) The entire explosive contents explode virtually instantaneously
• C) An explosion that occurs in multiple stages
• D) A fire that eventually causes a single explosion
CorreCt Answer: B — Mass explosion means the entire explosive contents explode
virtually instantaneously. This distinguishes HD 1.1 from other divisions where explosion may be
partial, sequential, or primarily thermal.
7. Which of the following is NOT a recognized Hazard Division for Class 1 explosives?
• A) HD 1.1
• B) HD 1.2
• C) HD 1.5
• D) HD 1.7
CorreCt Answer: D — Class 1 explosives are divided into divisions 1.1 through 1.6.
HD 1.7 does not exist in the standard hazard classification system. The six recognized divisions
are 1.1 (mass explosion), 1.2 (projection), 1.3 (mass fire), 1.4 (moderate fire), 1.5 (very
insensitive), and 1.6 (extremely insensitive).
8. A substance that detonates when subjected to shock, friction, or heat and is used to
initiate other explosives is called a:
• A) Secondary explosive
• B) Propellant
• C) Primary explosive
• D) Pyrotechnic composition
CorreCt Answer: C — Primary explosives are extremely sensitive compounds that
detonate readily when subjected to shock, friction, or heat. They are typically used in
AMMO 63 U.S. ARMY EXPLOSIVES SAFETY FAMILIARIZATION
(AMMO-63-DL) — COMPREHENSIVE EXAM QUESTION BANK V2.0
Defense Ammunition Center | U.S. Army Explosives Safety
Certification | 2026 Updated Standards
TABLE OF CONTENTS
Section Topic Area Questions
I Hazard Classification, Divisions & Explosive Types 1–20
II Ammunition Identification, Marking & Documentation 21–30
III Magazine Storage Operations & Safety Protocols 31–45
IV Quantity-Distance (QD) Principles & Calculations 46–65
V Transportation Safety & Hazardous Materials Shipping 66–80
VI Net Explosive Weight (NEW) & Complex Calculations 81–95
VII Electromagnetic Radiation (EMR), EEDs & Lightning Protection 96–110
VIII Standard Operating Procedures (SOPs) & Risk Management 111–125
Regulatory Framework, References & Certification
IX 126–140
Requirements
X Scenario-Based Applied Safety Situations 141–150
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SECTION I: HAZARD CLASSIFICATION, DIVISIONS & EXPLOSIVE TYPES
1. Which of the following statements accurately distinguishes between HD 1.1 and HD 1.2
explosives regarding their blast and fragmentation effects?
• A) HD 1.1 produces primarily fragmentation with minimal blast overpressure, while HD
1.2 produces primarily blast effects
• B) HD 1.1 produces a mass explosion with both blast and high-velocity fragmentation
affecting the entire load, while HD 1.2 produces primarily fragment-producing hazards
without mass detonation
• C) HD 1.1 and HD 1.2 both produce mass explosions, but HD 1.2 has a smaller radius of
effect
• D) HD 1.1 produces only thermal effects, while HD 1.2 produces blast effects
CorreCt Answer: B — HD 1.1 is characterized by a mass explosion hazard affecting
the entire load virtually instantaneously with both blast and fragmentation. HD 1.2 presents a
projection/fragment-producing hazard without mass detonation. This fundamental distinction
drives storage and quantity-distance requirements.
2. A pyrotechnic flare produces illumination through a chemical reaction that propagates
at subsonic speeds. This reaction is properly classified as:
• A) Detonation
• B) Deflagration
• C) Sublimation
• D) Combustion without gas production
CorreCt Answer: B — Pyrotechnics deflagrate (burn at subsonic speeds) rather than
detonate. Deflagration is a subsonic combustion reaction that propagates through the material
at speeds below the speed of sound, distinguishing it from detonation which is supersonic.
3. An explosive train sequence for a typical projectile consists of which of the following
components in the correct order?
• A) Primer → Main charge → Booster → Detonator
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• B) Primer → Booster → Main charge
• C) Detonator → Primer → Booster → Main charge
• D) Main charge → Booster → Primer
CorreCt Answer: B — The explosive train progresses from primer (most sensitive) to
booster to main charge. This ensures reliable initiation while maintaining handling safety. The
primer initiates the booster, which provides sufficient energy to detonate the relatively
insensitive main charge.
4. Which hazard division is characterized by a mass fire hazard with minor blast or
fragment effects?
• A) HD 1.1
• B) HD 1.2
• C) HD 1.3
• D) HD 1.4
CorreCt Answer: C — HD 1.3 presents a mass fire hazard with minor blast or
fragment effects. These materials burn vigorously and may produce some blast or
fragmentation, but the primary hazard is thermal (fire) rather than explosion. Pyrotechnic items
and some propellants commonly fall into this division.
5. An item classified as HD 1.4 presents which of the following hazard profiles?
• A) Mass explosion hazard with severe structural damage
• B) Projection hazard with significant fragmentation
• C) Mass fire hazard with minor blast
• D) Moderate fire hazard with no significant blast or fragment effects, confined to the
package
CorreCt Answer: D — HD 1.4 presents a moderate fire hazard with no significant
blast or fragment effects, with any effects typically confined to the package. This makes HD 1.4
materials the least hazardous in the Class 1 division system for storage and transportation.
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6. The term "mass explosion" in the context of HD 1.1 means:
• A) A series of explosions occurring sequentially over time
• B) The entire explosive contents explode virtually instantaneously
• C) An explosion that occurs in multiple stages
• D) A fire that eventually causes a single explosion
CorreCt Answer: B — Mass explosion means the entire explosive contents explode
virtually instantaneously. This distinguishes HD 1.1 from other divisions where explosion may be
partial, sequential, or primarily thermal.
7. Which of the following is NOT a recognized Hazard Division for Class 1 explosives?
• A) HD 1.1
• B) HD 1.2
• C) HD 1.5
• D) HD 1.7
CorreCt Answer: D — Class 1 explosives are divided into divisions 1.1 through 1.6.
HD 1.7 does not exist in the standard hazard classification system. The six recognized divisions
are 1.1 (mass explosion), 1.2 (projection), 1.3 (mass fire), 1.4 (moderate fire), 1.5 (very
insensitive), and 1.6 (extremely insensitive).
8. A substance that detonates when subjected to shock, friction, or heat and is used to
initiate other explosives is called a:
• A) Secondary explosive
• B) Propellant
• C) Primary explosive
• D) Pyrotechnic composition
CorreCt Answer: C — Primary explosives are extremely sensitive compounds that
detonate readily when subjected to shock, friction, or heat. They are typically used in
